' ·-

43 Part 2, Article 1 r INI: June, 1978 ( Issue 3

KSR/RO

CONTENTS Significant features of the 43 line include compati­ bility with existing 33 and 35 terminal communica­ Page tions procedures and system-software, operator­ selectable half or full-duplex operation, automatic­ Introduction ...... 1 answer capability, multi-copy, dot-matrix, impact System Description ...... 2 printing, full-ASCII upper and lower-case entry and print-out capability, responsive solid-state kevboard, Computer Time-Sharing ...... 2 compact size, built-in diagnostics, and a variety of Terminal-to-Terminal ...... 2 interfaces designed to meet the needs for digital, System Operation ...... 3 analog, voltage and current interfacing.

Computer Time-Sharing ...... 3 The 43 printer is availai.Jle in a pin-fed version which, Terminal-to-Terminal...... 3 in addition to its ability to produce an original and up to 2 copies of business form print-outs, can also Terminal Description ...... 4 produce print-outs with up to 132 characters per line, without exceeding the standard 8-1/2 by 11 inch < Terminal Operation ...... 4 paper size after the feed-hole margins have been torn General ...... 4 off. This is accomplished by printing 13 char/in on Operation of KSR with 103 Interface . . . . . 4 forms which are 8-1/2 inches long and 12 inches wide. Operation of KSR with ElA or TTL This permits "wide" printouts to be made on standard Interface ...... 18 paper, with a savings in filing effort. Operation of KSR with DC Interface ...... 24 Operation of RO with 103 Interface ...... 28 43 printers are also available in friction feed versions, Operation of RO with EIA, TTL to accommodate plain-paper print-outs. Both the Interface ...... 3 0 friction and pin fed versions feature operator and on­ Operation of RO with DC Interface ...... 32 line left and right margin set and clear, to provide un-. attended as well as operator attended formatted print­ Component Descriptions ...... 34 out capability.

General ...... 34 The 43 solid-state keyboard, in addition to the standard Features Summary ...... 34 Shift and Control keys, includes a Caps Lock key to Options ...... 35 permit upper case letters to be entered without having Component Operation ...... 36 to unlock to enter numerics, and a Repeat key for repeating any ASCII character or control. Key touch Technical Facts ...... 37 is similar to that of a good quality office typewriter. Code and Character Set ...... 37 Built into the overall 43 design is provision for a Physical Facts ...... 38 number of interfaces to allow the terminal to be Interfuces ...... 40 coupled to a variety of standard data sets and OEM designed devices, or to modular-type telephones.

Also part of the design are a number of diagnostics that enable the rapid isolation of troubles, if and when INTRODUCTION they occur, to the remote device, the communications facilities, or to one of the 5 main components in the The 43 line of terminals provide economical data 43, which are made highly modular for easy field re­ communications for computer time-sharing and placement and minimum down-time. terminal-to-terminal systems at an operator­ selectable 10 or 30 char/sec (110 or 300 bps) over This technical reference provides the system and half or full-duplex, switched-network or point-to­ terminal operator and on-line operation facts that point private-line facilities. support these and other features of the 43 line. Page 2 of 46 Issue 3

SYSTEM DESCRIPT-ION

Computer Time-Sharing Terminal-to-Terminal

Half-Duplex or Echoplexed Half or Full-Duplex Operation Full-Duplex Operation Over Over Private-Line Facilities Private-Line Facilities 0------GJ �

Switched Network

Half or Full-Duplex Operation Over Switched Network Facilities

43 te rminals can be used for basic terminal-to-terminal Half-Duplex or Echoplexed data communications over point-to-point or switched­ Full-Duplex Operation Over network facilities, Ln the half or full-duplex mode, to Switched-Network Facilities permit alternate or simultaneous sending and receiving between terminals in the system.

As illustrated above, 43 terminals can be used in As shown, the system can include 35, 33 and 33-com­ ·� computer time-sharing systems, whether private-line, patible terminals because the communications proce­ switched-network or a mixture of both of these dures are very similar and because the 43 can be facilities. They can be operated in a half or full-duplex switched by the operator from 300 to 110 bps to mode and can be echoplexed in the full-duplex mode. match the bit rate of 33 and 35 terminals. Half-duplex operation permits alternate entry and reception of data to and from the computer. Full­ duplex operation permits simultaneous entry and re­ ception of two different sets of data, or permits data that is sent to the computer to be returne d (echo­ plexed) to the terminal, as well as received by the computer, as a method of assuring the terminal operator that the data successfully reached the computer.

As shown, the system can include 33, 35 and 33- compatible terminals, as well as 43 terminals, since all can be served by similar, if not identical, software.

Also in many systems, it is possible, for different ter­ minals to operate at different speeds. This would allow 43 terminals to be added and used at their higher 30 cps speed without requiring the replace­ ment of existing lower speed 10 cps terminals. Page 3 of 46 43 Part 2, Article 1

( SYSTEM OPERATION

Computer Time-Sharing Terminal-to-Terminal

In many switched-network computer time-sharing sys­ In a switched-network terminal-to-terminal communi­ tems the operator of a terminal desiring to use the cations system, the operator at a terminal desiring to computer first establishes a voice connection with the send to another terminal first establishes a voice con­ computer, via an associated phone or similar calling nection with the desired receiving terminal via an unit, and then switches to the data mode, on hearing associated phone or siP

If both terminals are attended and equipped with a phone, the operators may talk after as well as before the data connection has been established, by switch­ ing back to the talk mode.

With point-to-point private-line instead of switched­ network facilities, there may or may not be a need to establish a connection between two terminals prior to either sending to the other. Typically the connec­ tion is established at all times and either terminal can send to the other by merely beginning to send.

(� Page 4 of 46 Issue 3 ·�

TERMINAL DESCRIPTION

43 terminals are presently available in KSR Operation of a KSR with a 103-Type (Keyboard Send-Receive) and RO (Receive-Only) Built·ln Modem Interface configurations, comparable to model 33 and 35 KSR and RO configurations. The KSR configura­ Typical Operator Procedures tion permits data to be entered and printed, entered and printed while being sent, or received and printed. If operated in the full-duplex mode, data (Assumes power on and associated phone on-hook can be entered and sent while other data is being when DATA or AUTO ANSW lit) received and printed, but entered data cannot be If LOCAL/TALK, nATA or AUTO ANS is lit, the printed while being sent. The RO configuration other two cannot be lit permits data to be received and printed.

Both KSR and RO configurations are available with To Originate a Call: a variety of interfaces to permit them to be coupled to the variety of systems described earlier, and also Depress LOCAL/TALK if not lit to permit them to be incorporated into OEM de­ Take phone off-hook signed systems and terminal configurations. In­ Listen for dial tone and dial cluded are TTL-Serial, 103-type Built-In Modem, Listen for ringing followed by tone or talk EIA-RS232/DC-20 to 60 rna, and Dual (Line + Auxiliary)EIA/DC interfaces which permit the 43 If tone heard, depress DATA to be coupled to 103, 113 and 212 type data sets, If no tone, talk and depress DATA when agreed to telegraphic type circuits, to OEM designed hard­ Put phone on-hook ware, and to modular type telephones. Be sure DATA is lit (may flash first) ) Begin sending (or receiving) data

To Manually Answer a Call: TERMINAL OPERATION LOCAL/TALK must be lit prior to call Take phone off-hook when it rings

General Talk and depress DATA when agreed Put phone on-hook Operation of any 43 terminal is simple and straight­ Be sure DATA is lit (may flash first) forward. The following paragraphs describe typical Begin receiving (or sending) data terminal operation and operator and on-line controls and indicators for KSR and RO configurations with a 103 interface and with other than a 103 interface. Also included are mode diagrams for each of these To Automatically Answer a Call: configurations which show all possible ways in Depress AUTO ANS if not lit which the configuration can be operated via opera­ tor and on-line controls. DATA lights when phone rings Reception begins

To In terrupt Remote Sender:

Depress INTRPT (briefly lights) Reception should stop If remote operator present Transfer from Data to Talk If no remote operator present "\J..· .. ,� Wait for instruction from remote device or disconnect Page 5 of 46 43 Part 2, Article 1

( � � '�'�'' I� �"'I '�"'' ON-UP HALF-UP 0-UP LOCALTALK DATA ANSWAUTO INTRPT ALARM PRINTERTEST PARITY DUPLEX 3CPS - OFF-ON FULL-ON 10-DN

)"--"--1 r------, � � � � � � � * � ESC 1 2 3 4 5 6 7 8 91 rTl0 SPACEBACK r---1 [ n- rl DC1 ETB � DC2 I DC4 � � � � OLE � a w E R Tl y u I 0 p = s t------1 RETURN }Til � II s H E T - B L CAP�I ) A ( � D ( l [ H l I LOCK 1 053 [ m G m m m n I I m1 )----SUB CAN l----1 E SYN t-s,:x t------1so � � � T---:)1 LINE SHIFT l z X I CX { v 8 N M I SHIFT I FEED �CTRL( l IREPT( 'DELETE�

To Transfer from Data to Talk: To Clear Margins (in DATA or LOCAL/TALK) Take phone off-hook Enter on the keybua!'d: Send data stating talk desired ESC x (lower-case X) Depress LOCAL/TALK when agreed and talk ( This clears margins and also moves the print-head to the left-most location To Disconnect: If DATA lit To Perform Analog Loop-Back Test: Depress LOCAL/TALK or AUTO ANSW key or send EOT Depress LOCAL/TALK if not lit If LOCAL/TALK lit Keyboard ESC> (ALARM flashes) Put phone on-hook Depress DATA (DATA lights) Observe that characters entered with teleprinter in half-duplex mode print double To Set Margi'ns (in DATA or LOCAL/TALK mode) Enter on the keyboard: ESC x (lower-case X) To Perform Digital Loop-Back Test: As many SPs as there are spaces to the desired Originate call to remote tester left-hand margint (as described earlier) ESC I (lower-case L) Receive ESC< (ALARM t1ashes) As many SPs as there are spaces to the desired Receive test data right-hand margint (which is echoplexed back to sender)

Receive ESC = (ALARM stops) ESC r (lower-case R) Obtain results of test in DATA or RETURN LOCAL/TALK mode as desired or required Margins have now been set to allow printing to begin at the left-hand margin and end 1-character ahead of the right-hand margin (e. g. if margins are set at 10 and 7 0 on the print-position scale, a 60-character line has tThe print-head pointer points to the position (" been allowed for, beginning with the first where the next character will be printed only character at 10 and ending with the last aftera 1-second delay in motion (due to the printer's character at 69). last character visibility feature). Page 6 of 46 Issue 3

Operator & On-Line Controls & Indicators for a KSR with a 103-Type Built-In Modem Interface ,,�

� �

LOCAL Lit if in LOCAL{fALK modet AUTO Lit if in AUTO ANSW modet TALK ANSW

Puts terminal in LOCAL/TALK mode: Puts terminal in AUTO ANSW mode:

Permits off-line operation Puts terminal in DATA mode on receipt of call (after 1-ring) if: Permits phone to be used to originate or manually answer a call phone on-hook or no phone

to talk carrier received within 20 sec

to establish a daW. connection Prevents phone from being used to originate or manually answer a call Causes disconnect if: Causes disconnect if: in DATA mode in DATA mode phone on-hook or no phone phone on-hook or no phone or Causes transfer from data to talk mode if or Causes transfer from data to talk mode if: in DATA mode in DATA mode phone off-hook phone off-l1ook Removes effect of received interrupt received carrier turns off Removes either loop-back Removes effect of received interrupt )

Removes either loop-back � Lit if in DATA modet LJ (May flash before lighting ) � INTRPT Lit if interrupt (200ms state 0) received Puts terminal in DATA mode: (Bell rings )

Permits data to be sent or received If depressed when not lit: Disables phone Sends interrupt (250ms state 0) or Puts terminal in AUTO ANSW mode if: (to halt transmission from remote device) Call connection not established If depressed when lit: Carrier not received within 20 sec Removes effect of received interrupt

Turns off indicator

tlf LOCAL/TALK, DATA or AUTO ANSW key is lit, the other two are not lit. i.e. the terminal can only be in one of these three modes at any one time. Page 7 of 46 43 Part 2, Article 1

� ON-UP ( ' Lit when: Flashes during: Detector on if up, off if down PARITY Depress to lock down, again to release Paper out Either OFF-ON L:J (Does not affect sent parity) or low loop-back Cover up PRINTER If on: TEST Causes terminal to print symbol • on receipt of depressed character with even vertical parity error

If off: Paper Out or Low (Pin or Friction Fed Printer, respectively): Causes terminal to print character received Lights ALARM & rings bell regardless of its parity

Puts terminal in LOCAL/TALK mode: on receipt of 8 NLs if in DATA mode & if pin-fed printer In half-duplex mode if up, HALF-UP full-duplex if down DUPLEX immediately if in AUTO ANSW mode Depress to lock down, again to release FULL-ON Prevents entry into DATA or AUTO ANSW mode

Half-Duplex mode: Cover Up: Permits terminal to send or receive, Lights ALARM but not both at same time

Prevents sending or receiving if in PATA mode Causes terminal to print characters and obey (without causing disconnect) controls sent from keyboard

Puts terminal in LOCAL/TALK mode if in AUTO ANSW mode Full-Duplex mode: (' Permits terminal to send and receive, Prevents entry into DATA or AUTO ANSW mode both at the same time

Causes terminal to ignore characters Bell Rings: and controls sent from keyboard (unless being echoplexed in full-duplex) 7 spaces ahead of and at right-hand margin if print-head moving right Prevents CTRL plus RETURN function

at left-hand margin on entry or receipt of backspace

on receipt of interrupt (200 ms state 0)

on paper out or low 30-UP 30 char/sec if up, 10 if down CPS Depress to lock down, again to release 10-DN

If up: PRINTER On if held down, off if up Causes terminal to send and receive at 30 char/sec TEST (300 wpm) (300 bit/sec)

Puts terminal in LOCAL/TALK mode If down: Causes terminal to send and receive at 10 char/sec Causes entire character set to be continuously (100 wpm) (110 bit/sec) printed (as shown below)

( • '"MS%!'(l*+,-./0123456789:;<=>'@ABCDEFGHIJKLHNOPQRSTUVUXYZ[\]' 'abtdefghi klMnopqrstuvw�yz{:}- • I"M$%1'()t+,-.!0123456789:;<=>'@ABCDEFGHIJKLHNOPQRSTUV�XYZ[\J._'abcdefghi klMnopqrstuvwxyz{:}- Page 8 of 46 Issue 3

Operator & On-Line Controls & Indicators for a KSR with a 103-Type Built-In Modem Interface (Cont'd) '1

(Power) rtr On if LOCAL/TALK, DATA or AUTO r-::l On if down, off if up L:J Depress to lock down, again to release ANSW lit

Permits keyboard entry of upper-case letters without Power off: having to use SHIFT and without having to unlock CAPS LOCK to enter unshifted characters such as Disables terminal numbers Permits phone to be used to originate or manually answer a call

Causes disconnect if:

On if held down, off if up in DATA mode G phone on-hook or no phone or Causes transfer from data to talk mode if: Permits keyboard entry of shift-position characters in DATA mode

phone off-hook

Removes effect of received interrupt On if held down, off if up B Removes either loop-back . Permits keyboard entry of shift-position controls Power on: Enables terminal ) Puts terminal in AUTO ANSW mode

If depressed with CTRL key: Clears margins RETURN I Causes return and line feed Moves print-head to left-most location (except in full-duplex mode) without sending on-line controls

B On if held down, off if up Causes character and on-line control keys depressed at the same time as the REPT key to be repetitively sent until released Page 9 of 46 43 Part 2, Article 1

When in Transmission t or Reception Reception When in DATA mode ( Keyboard DATA of Control in OATA mode of Control Entry of mode or Control Sends Entry of Control ESC< Flashes ALARM Control in LOCAL ITALK mode Puts terminal into digital LINE NL Feeds paper up 1-line loop-back FEED I Disables keyboard Moves print-head to RETURN CR except for ESC = left-hand margin Stops ALARM BACK Moves print-head 1-character ESC= Removes either SPACE BS left or rings bell if at loop-back BS left-hand margin Lights INTRPT BEL Rings bell Interrupt (200ms state 0) Disables keyboard Pr<>vents character that follows ESC Rings bell from being printed EOT ESC I Sets left-hand margin at 2 sec state 0 Puts terminal in AUTO (lower-case L) print-position I ANSW mode if phone 450ms car'r off on-hook or no phone ESC r Sets right-hand margin at Esc> (lower-case R) print-position or character other Moves print-head Clears margins ESC X than CR when to left-hand margin Moves print-head to (lower-case X) print-position at left-most location right-hand margin Feeds paper up 1-line Permits print-head to Puts control or ESC m proceed past left or character and others (lower-case M) right margin, once that follow into printer buffer until Feeds paper up 1-line ESC w print-head reaches ( (lower-case W) Moves print-head to left-hand margin, left-hand margin --- - at which time printer - operates at 4 7 cps until buffer empty (no rec'd data lost)

Keyboard When in When in DATA mode Entry of LOCAL/TALK Sends Control & Analog Loop-Back Control mode

ESC> Flashes ALARM Flashes ALARM M Puts terminal Causes disconnect into analog if phone on-hook 0 loop-back after or no phone if HDX I d DATA depressed or causes transfer e to data mode if ESC < Flashes ALARM m phones off-hook Puts terminal into digital Puts terminal loop-back into analog Auto'ly goes to loop-back if Digital Loop-Back DATA mode on phone on-hook call receipt, but .. .. or no phone , DATA not lit � � M Permits off-line if I operation during 0 LOCAL/TALK loop-back until d DATA depressed, e Causes no action which causes "f m

received data to � ...� ATA ------., print as well as lit be looped back ~ (, ESC = Stops ALARM Stops ALARM Removes either Removes either loop-back loop-back t No action occurs if transmitted when terminal in full­ I... duplex mode (unless being echoplexed) Page 10 of 46 Issue 3

Mode Diagram for a KSR with a 103-Type Built-In Modem Interface

The diagram that follows shows all of the possible A talk connection is established with a remote device ways in which a KSR terminal with a 103 interface in the LOCAL/TALK mode either by lifting the phone can be operated via operator and on-line controls. and dialing or by hearing ringing and lifting the phone. It includes modes and mode changes described earlier If a tone is then heard, in either case, the DATA key under operator and on-line controls, plus additional should be depressed and will establish a data connection. possibilities which may be of interest. Otherwise this can be done if and when agreed to the For ready reference relative to mode diagram, the during the talk connection. As shown on the mode following brief descriptions are included: diagram it is also possible to revert to a talk con­ nection from a data connection. In the LOCAL/TALK.mode the LOCAL/TALK key T is lit and the phone is either off-hook or on-hook. A data connection is established (after a talk con­ If off-hook, a talk connection has been (or is about nection) if both the terminal and the remote device to be) established with a remote device. If on-hook, turn on carrier within 20 sec of each other. At the the terminal is disconnected (and is possibly being terminal this is done by depressing DATA or by an used for off-line operation). automatic transfer from AUTO ANSW to DATA. (Normally whichever location answers the call turns T, In the DATA mode the DATA key is lit a data on carrier first.) (send/receive) connection has been established with a remote device, and the phone is on-hook (preferably) A word of caution: In several cases the mode diagram in or off-hook. While this mode receipt of interrupt will appear to be incorrect when compared to the (200ms state 0) prevents further sending from the operation of an actual terminal. This is because the ) terminal (but does not prevent reception) until the mode diagram does not show the intermediate steps INTRPT key is pressed. (Depression of the key at that the terminal goes through en route from one other times sends 250ms state 0 to halt the remote mode to another, nor does it show the time required device when it is sending.) (sometimes up to 4 sec) to change modes. (Timing is shown for typical situations in the next section). In the AUTO ANSW mode the AUTO ANSW key is Therefor, when observing an actual terminal wait T lit , the phone is on-hook and the terminal auto­ several seconds to be sure that the mode arrived at matically switches to the DATA mode on receipt is the final one. of a call (after 1-ring). Also, the mode diagram assumes that both the terminal and remote device phones are on-hook or "f'Whenever the LOCAL/TALK, DATA or AUTO off-hook together (or at most within 4 sec of each ANSW key is lit, the other two are not. Also, if other) in order to carry out the mode changes any one of these keys is lit, power in on. shown. Page 11 of 46 43 Part 2, Article 1

Mode Diagram for KSR with 103 Interface ( Follow heavy arrows for typical call origination & Diagram assumes that both terminal and remote '" disconnect sequence (start at heavy circle). phones are on-hook or off-hook together (or at most within 4 sec of each other). Diagram does not show loop-back modes.

0 =Depress S =Send A= Receive

Mode Phone On-Hook or No Phone

• Take phone off-hook

• Put phone on-hook

(.) •-s- .._,. ,. @ ���� . �.._ <"� -.. � � c � ll ,& .... ""-'0'- <1'1 �­ • ..._ :c eTurn power on Q' I I'-- •D-DATA & • oa:2 ·� • ®

c ® :s • Put phone on· hook j c 0 e I 0 ·� "' Connected oi;� ... I ] 8 I ,,.'<'& ,_z eo I o0 -a: �o�_ 'X' 'bv..e9 o1S � �-�� I � 0 5( �:::> --�'·"- oa - c ;;; ·"'c Disconnected WNu

ePut phone on-hook ·�o .,. ' ,o..,

"'""'>""?(...... >-�"' o 0 ""' "-.,-1-z, �o.,

eTake tJhone off-hook

• Put phone on-hook I ® ® I • t • D-LOCAL!TALK • R -8N Ls after paper Raising cover prevents eannot leave LOCAL(TALK e D-PRINTER TEST out (pin feed printer) sending or receiving mode if cover up, paper out • Raise cover • D-LOCAL(TALK I {without causing or low or power off. Power • Turn power off e D-PRINTER TEST disconnect or mode off also prevents off-line • Remove paper • Turn power off change) operation of terminal & e Low paper turns off LOCAL(T ALK (friction feed printer) light, but does not prevent phone operation

( ,, Page 12 of 46 Issue 3

Operating Sequence Diagrams for a KSR with a 103-Type Built-In Modem Interface

The following diagrams show the sequence of events that occur at the originating and answering locations for the type of communications assumed by each diagram.

Diagram I

Diagram I assumes a 43 tenninal at both the originating and answering location and an operator present at the originating location but not at the answering location.

ORIGINATING ANSWERING l SWITCHED I I NETWORK Operator _ ____ I 43 1 43 I Operator � � � � � � � � . c Des�res to send I � � � � � c � C C 0 e>. a: a: e>. 0 C I Not present u � � � c c � � � u g � � � � � � � � g � � � � nnM�� Pushes LOCAL/TALK r r f. Off hook Lifts phone - J-+-+--1--1--1--1-l--i--i--- !------Dial tone Hears dial tone - Dialing Dials - Ringback I --- Ringing � Hears ringing : : ! Off hook 1-ron 1-: .. I r� f 120n f2on 1) I f· ';!.S Hearst2istate - I state � I , ) (state , ) _ I _£ :_,. I Pushes OAT At rb l )· 0 � ·. Ij_ f1 on f1 on u> E 1-+-+-4...1-1-!--1-1-!--+-L ;? � (state 1) � --- (state 1) T 1 Sees D A T A on E 0 � "' I Hangs up phone � E I I l �u �u Enters data ---{ ... ------I 1! FSK) 1! FSK) ! rt 1 1 ��l U�L - �

Disconnect caused by EOT sent from onginat1ng 43 Data Data .-- .-- ...- 1!1 FSK) 11 FSK) Enters data (cont'd) --- 1 .-- f'l r- t "' � I EOT EOT - E I· Enters EOT Lftjr --- , I g E f2 state 0 f2 state 0 l f f r-TT - Hears bell +- l Ll.__j___< ' r f off & f off 0 I� ' Sees Indicators r--T - r ; � , 1 --- g ! '· g On hook ..,. E � f ff & i f co E --- 2° ___1__I i I On hook I t ! �� �-- - u��

2 t can be done after ringing has begun if t2 (state 1) is received w1thin 0 sec Page 13 of 46 43 Part 2, Article 1

( ' The key to reading these diagrams is to read acro ss the diagram before reading down the diagram. Also, realize that time passes as you read down the diagram. In a sense, the diagram gives you the ability to view the activities at the originating and answering locations at the same time.

ORIGINATING ANSWERING SWITCHED NETWORK 1------,-- -- Operator 43 43 Operator

" ...J ...J <1: "' "' <1: z z r­ t: <1: r­ ...J t :; :; a. <1: :; 0 a: a: <1: <1: a: a: 0 <1: <1: (.) r- r­ <1: <1: r­ r­ r­ (.) :;) r­ ...J ...J 0 <1: z z :;) <1: 0 ...J 0 <1: <1: <1: <1: 0 ...J

Disconnect caused by carrier fail , 11>1 H---£!1 Data Data Enters data (cont'd) I I I I I I I (t, FSK) tt1 FSK) •

t2 off IT.iso car'r fail I -+ ;., s t1 off & f1 off Sees indicators +-+- On hook loll �t4<;() f2 off & �s

On hook ( Retries call L-l '-- '-' '--- L- '--- L L I

Disconnect caused by a paper out at the answering 43

-

Data Enters data (cont'd) -- tt1 FSK)

Hears bell Sees indicators f� Stops data entry ! l Pushes LOCAL/TALK f .. On hook Lifts phone

Dial tone Hears dial tone Dialing , ___..... Dials r ., • Ringback Ringing t. Hears ringing t'

Does not hear t2 ,·,:30� l On hook Ring off Hangs up phone t t h !' � !.ii L....J L...J L_..JL- '---' '-- L.J

( . ·�. '�'

ORIGINATING ANSWERING SWITCHED NETWO.RK Operator 43 43 Operator :..: :..: ..J ..J c( en en c( z z t: c( t: ..J c( f- :=: :=: f- ..J ... a: ... c( c( oj, 0 a: a: 0 c( f- f- a: c( '" f- u Desires to send u f- c( f- Present 0 c( ::l ..J ..J ::> c( 0 ..J c c( � -<( -c( � -c( c ..J - r !""! r r n Pushes LOCAL/TALK _f l " Off hook Lifts phone �· -l Dial tone I Hears dial tone Dialing ---- f Dials Ringback Ringing Hears ringing [ Hears r"inging .... Off hook 1� i Lifts phone _.. ___ Talk Talk Talks r Talks

u Pushes DATA 22 Sees l ---- 1 05 15 f2 on ms D DATA flash t (max[sec f2 on ) Hears f2 (state 1) I· (state 1) ---- (state 1) c Pushes OATAt t io f1 on f1 on I '·· 50 1 Sees DATA on 50 (state 1) (state 1 ms 7 ms l Sees DATA on Hangs up phone ms ---- - j Hangs up phone r -- Data Data Enters data v t Sees data L (11 FSK) (11 FSK) - - L - � '- '- '- '--- I

43 Answering operator stops originating without disconnecting - r- r- r- r- r- r - r-� ---- .. -r- Data Data r Enters data (cont'd) I ! Desire$ to stop (f1 FSK) (f1 FSKI ---- f sender without r-- I f2 state 0 12 state 0 disconnecting:& t I Pushes NTRPT -r-J. 200 I t ---- J� Hears bell i ms f--- Sees INTRPT on ' f2 state 1 ..,. 12 state 1 Sees indicators ! ' i INTRPT off - ---- I Data entry stopped -� r-r-r-; r-- Data Data i Sees dataI r--� Enters data 112 FSKI ..., (f2 FSK) I Pushes NTR PT I i Page 15 of 46 43 Part 2, Article 1 (

ORIGINATING ANSWERING SWITCH�� NETWOR� Operator 43 43 Operator :.: -':.: ...J <( C/) C/) <( !:: z z 1- ...J <( 1- :::. :::. 1- <( ::J ...... <( <( 0 a: a: 0 <( <( 1- 1- a: a: .... (,J 1- <( <( 1- 1- (,J 0 <( :::J ...J ...J :::J <( 0 ...J 0 <( :!: <( <( :!: <( 0 ...J

Answering operator desires to disconnect -originating operator pushes LOCAL/TALK Data Data (f2 FSK) ---- !f2 FSK) Enters data saying Reads data ""' 200 ""' disconnect desired f1 state 0 ., f1 stateo ... ms ·, Pushes LOCAL/TALK 4000 ... r t f2 off ---- .... f off & 1 Hears bell ms .... 2 II Sees indicators "' On hook 1 f1 off & ---- 800 ... ms "" 11 off On hook ' -- ' '- '- '- '- '- \__

Answering operator desires to talk - - ( r-- r- r-- r- r- Data ---- Data Enters data saying Reads data ..., talk desired (12 FSK) !12 FSK) 2 00 Lilts phone Lifts phone f1 state 0 .. ---- f1 state 0 ... ms Pushes LOCAL/TALK ... r ,Joo t 12 state 0 ---- f2 state 0 � - Hears bell Sees INTRPT on & 4000 " .... s r-c-� ms 12 off ---- f2 off � .,t·� Pushes LOCAL/TALK ...... 11 off ---- 11 off ...... ---- Talk Talk Talks ...... _... Talks On hook ---- On hook ,. Hangs up phone ... Hangs up phone

Answering operator desires to disconnect -originating qperator enters EOT

Data ---- Data r - Reads data -r- . .... f- Enters data saying .... (f2 FSK) .... (f2FSK) disconnect desired

---- EOT . .., � EDT ... Enters EDT 2 ... "" 00 ' f2 state 0 --- f2 state 0 ms .... s l ...... f 4000 Hears bell -f- 1 f1 off .. f1 off _., Sees indicators - ... � '- llil1l '- 1800 \__ '- '- ...._ f2 off f2 off _r_ ms .... �

( Page 16 of 46 Issue 3

Operating Sequence Diagrams for a KSR with a 103-Type Built-In Modem Interface ( cont'd)

Diagram Ill

Diagram III assumes a 43 terminal and an operator at the originating location and a computer at the answering location.

ORIGINATING I SWITCHED COMPUTER NETWORI< Operator 43 ANSWERING

:.:: -l <1: en Desires to z :i <1: 1- ::E Use Computer 0.. <1: <1: 0 a: a: u 1- 1- 1- <1: 0 <1: ::> z -l -l 0 <1: <1: � r r- [] r- Pushes LOCALfTALK f: Off hook)lio lifts phone 1� �Dial tone Hears dial tone t- Dialing Jlo Dials t- ' ,. � Ringback Ringing )lio j_ Hears ringing f-. ... Off hook 1-ring ; Detects call f' t2 on Hears f (state 1) �2� 2 �1) (state �' � 11 Turns on f (state 1) f--lf: I 10 sec 2 7ms Pushes DATA t '• on (maxi _,, _on� _ .:L_ Detects f (state 1) I� (state 1 Sees DATA on > 11 1�r 11 ms Oil Data Reads sign-on data f � --- Sends sign-on data Hangs up hone I 112 FSKI (!2 FSKI �; Enters data & � � Authorization routine I �) . --- Reads data per l .•. If, FSKI (11 FSKI Data routine r o4 FSK) � 112 112 FSKI I Data • Enters inquiry � Reads inquiry If, FSKI (f1 FSKI Processes inquiry Data Data Reads reply data t· Sends reply data Oil t �KI 112 FSKI I=

Operator desires to stop reply without disconnecting

i Desires to stop reply f 200 � state0 ms f1 _L_ Detects f state 0 Pushes INTRPT 1 1 I 112�ms �1 �:· : � Stops sending I Reads Sends acknowledgement i ! Data > ·Enters data � Reads per routine i '

Operator desires to disconnect

' Desires to end I � l Data Enters end data � "'- .Reads end data : Data � Sends sign-off data Reads sign-off data .....- t2 off

- - tcan be done before f (state 1) is heard if it is received within 20 sec 2 Page of Part 2, Article 17 46 (c 43 1

Diagram DiagramIV assumes a computer at the originating location and a terminalwithout an operator at the answeringIV location. 43

ANSWERING ORIGINATING SWITCHED COMPU\ER NETWORK 43 Operator

� ...J "' <( z 1- I­ <( Desires to send :::! C. Not present a: 0 <( :;<( Off hook a: <( 1- 1- u Goes off hook ...J <( 0 <( <( 0 ...J Dial tone � Detects dial tdne • ,-- r- � r- ' Dialing Dials Ringback Ringing _L Detects ringing -...... 1 Off hook -ring Goes to data I" �055 f2 on f2on _L 1 ms �· 1 (state J 1 (state Detects f2 state J 10� f1 on I" 11 on :l__ 1 1 m (state J __.. (state ) Turns on f 1 state 1

Data Data Sends data (11 FSK) (11 FSKJ

Disconnect caused by computer

f1 o l Turns off f1 ... ; On hook ( Goes on hook Ill

Disconnect caused by carrier fail 12 off

car'r fail Detects f2off ---, Stops sending data ��  1 f1 off& 11 off Turns off f1 & '_j__ On hook I I I I U y Goes on hook � I T;,� Retries call ;"0�::k

Disconnect caused by paper alarm at answering 43 r Sends data (cont'd) 200 i 8 lines :_� 0 ms data Detects f 2state of t Stops sending j II f1 off Turns off f1 I 1800 t2off 12 off & Fl I..._ Ill Detects f2off ms ff hook On hook Goes on, then off hook I� "' Dial tone I" [ .... Detects dial tone �• t'i lti�_.y Dialing lilo Dials - f� Ringback Ringing Detects ringing I � rfq Goes to data t 1 Does not detect f 2 state [,<" On hook Stop ring l Goes on hook .. !

i I !�i ( L '- '- L...J . t Page 18 of 46 Issue 3

Operation of a KSR with an EIA or TTL Interface

�. I 7 r '�"�'I ���'I I� �1 [E§J I�' ,I ON-UP HALF-UP 30-UP TERM PRINTER DATA INTRPT ALARM PARITY DUPLEX CPS I LOCAL TEST READY OFF-ON FULL-ON 10-DN ..

l ESC I

TcAPS LOCK

LINE � ( FEED cTRL

Typical Operator Procedures ) (Assumes power on and an associated data set and To Manually Answer a Call: phone equipped with LINE & DATA keys) (If LOCAL, LOCAL must be lit prior to call DATA or TERM READY lit other two are not) Depress LINE (on phone) if not already (Assumes phone on-hook when DATA or TERM READY lit) Take phone off-hook when it rings Talk & depress TERM READY & DATA* To Originate a Call: when agreed Depress TERM READY if not lit Put phone on-hook Depress LINE (on phone) if not already Begin receiving (or sending) data Take phone off-hook To Automatically Answer a Call: Listen for dial tone & dial Depress TERM READY if not lit Listen for ringing followed by tone or talk DATA (on terminal) lights when phone rings If tone heard, depress DATA* Reception begins If no tone, talk & depress DATA* when agreed

Put phone on-hook

Begin sending (or receiving) data

*(on phone)-causes DATA on terminal to light ,j (may flash before lightbg) when connection established. Page 19 of 46 43 Part 2, Article 1

( "

To Interrupt Remote Sender: To Perform Digital Loop-Back Test:

Depress INTRPT (briefly lights) Originate call to remote tester (as described earlier) Reception should stop

If remote operator present: Receive ESC< (ALARM flashes)

Transfer from data to talk Receive test data If no remote operator present: (which is echoplexed back to sender)

Wait for instruction from remote device Receive ESC = (ALARM stops) or disconnect Obtain results of test in DATA or LOCAL mode as desired or required To Transfer from Data to Talk:

Take phone off-hook To Set Margins (in DATA or LOCAL mode) enter on the keyboard: Send data stating talk desired ESC x (lower-case X) Depress LINE (on phone) when agreed & talk As many SPs as there are spaces to the To Disconnect: desired left-hand margint 1 If DATA (on terminal) lit: ESC (lower-case L)

Depress LOCAL or TERM READY or As many SPs as there are spaces to the send EOT desired right-hand margint

If DATA (on terminal) not lit: ESC r (lower-�ase R)

Put phone on-hook RETURN

Margins have now been set to allow printing to To Perform Analog Loop-Back Test: ( begin at the left-hand margin and end 1-character Depress LOCAL if not lit ahead of the right-hand margin (e. g. if margins are set at 10 & 70 on the print-position scale, a SO­ Keyboard ESC> (ALARM flashes) character line has been allowed for, beginning Depress DATA (on phone) (DATA lights) with the first character at 10 and ending with the last character at 69). Observe that characters entered with terminal in half-duplex mode print double To Clear Margins:

Enter on the keyboard:

ESC x (lower-case X) tThe print-head pointer points to the position This clears margins and also moves the where the next character will be printed only after print-head to the left-most location a 1-second delay in motion (due to the printer's last character visibility feature).

(,, Page 20 of 46 Issue 3

Operator & On-Line Controls & Indicators for KSR with an EIA or TILInterface � Lit when: Flashes during: d Paper out AL* or DL* on or low � Cover up Lit if in LOCAL modet PRINTER D TEST depressed . Puts terminal in LOCAL mode:

Permits off-line operation Paper Out or Low Turns off TR/DTR (*-see next page) (pin & friction feed printer, respectively): Removes effect of received interrupt Lights ALARM & rings bell Turns off AL* & DL* Puts terminal in LOCAL mode:

after receipt of 8 NLs if in DATA mode � & if pin-feed printer L=.J Lit if in DATA modet immediately if in TERM READY mode

Prevents entry into DATA or TERM READY Indicates when data can be sent or received mode

Cover Up: � TERM Lights ALARM READY Lit if in TERM READY modet Prevents sending or receiving (without turning off TR/DTR*)

Puts terminal in TERM READY mode: Puts terminal in LOCAL mode if in TERM READY mode

") Turns on TR/DTR * & permits terminal to enter DATA mode when DR/DSR*, CTS* & CD* Prevents entry into DATA or TERM READY mode turn on Bell Rings: Turns off TR/DTR* for 50ms if DATA lit 7 spaces ahead of and at right-hand margin if Removes effect of received interrupt print-head moving right

Turns off AL* & DL* at left-hand margin on entry or receipt of backspace

on receipt of interrupt (200ms state 0) Lit if �terrupt (200ms state 0) rec'd on paper out or low t:j (Bell nngs) If depressed when not lit: �

Sends interrupt (250ms state 0) PRINTER TEST On if held down, off if up (to halt transmission from remote device)

If depressed when lit: Puts terminal in LOCAL mode Removes effect of received interrupt Causes entire character set to be continuously Turns off indicator printed (as shown below)

tif LOCAL, DATA or TERM READY lit, other 2 are not

• l"M�%!'1l*+,-,/0123456789:;<=>'@ABCDEFGHIJKLMHOPQRSTUVUXYZ[\]"_'abcdefghijklMnopqrstuvw�y:{:}- • l"MS%!'1l*+,-./0123456789:;<=>'@ABCDEFGHIJKLMNOPQRSTUVUXYZ[\J"_'abcdefghijklMnopqrstuvwxy:{:}- Page 21 of 46 43 Part 2, Article 1

ON-UP Detector on if up, off if down " On if held down, off if up PARITY Depress to lock down, again to release (,, OFF-ON (Does not affect sent parity) '------' G Permits entry of shift-position characters on keyboard If on:

Causes terminal to print symbol• on receipt of character with even vertical parity error On IT held down, off if up If off: EJ Causes terminal to print character received Permits entry of shift-position ':ontrols on regardless of its parity keyboard

HALF-UP In half-duplex mode if up, If depressed with CTRL key: DUPLEX full-duplex if down FULL-ON Depress to lock down, again to release Causes return & line feed RETURN (except in full-duplex mode) without sending on-line controls Half-Duplex mode:

Permits terminal to send or receive, but not both at same time

Causes terminal to print characters and obey On IT held down, off IT up controls sent from keyboard B Full-Duplex mode: Causes character and on-line control keys depressed at Permits terminal to send & receive, both at the same time as the REPT key to be repetitively sent the same time until released ( Causes terminal to ignore characters and controls sent from keyboard (unless being echoplexed in full-duplex) (Power) Prevents CTRL plus RETURN function On if LOCAL, DATA or TERM READY lit 30-UP rzr CPS 30 char/sec if up, 10 if down Power Off: 10-DN Depress to lock down, again to release Disables terminal

Turns off TR /DTR* If up: Removes effect of rec'd interrupt Causes terminal to send and receive at 30 char/sec (300 wpm) (300 bit/sec) Turns off AL*

If down: Power On:

Causes terminal to send and receive at 10 char/sec Enables terminal (100 wpm) (110 bit/sec) Puts terminal in TERM READY mode

Clears margins

On if down, off if up Moves print-head to left-most location u� Depress to lock down, again to release

Permits keyboard entry of upper-case letters without *on interface: having to use SHIFT and without having to unlock TR/DTR = (Data) Terminal Ready CAPS LOCK to enter unshifted characters such as DR/DSR =Data (Set) Ready numbers CTS = Clear To Send (, CD = Carrier Detect AL = Analog Loop DL = Digital Loop Page 22 of 46 Issue 3

Reception . Operator & On-Line Controls & Indicators for When 1n DATA mode of Control KSR with an EIA or TTL Interface (Cont'd)

ESC< Flashes ALARM

Turns on DL* When in Transmission t or Reception Keyboard DATA of Control in DATA mode Disables keyboard Entry of mode or On-Line except for ESC = Sends Entry of Control Control Control in LOCAL mode Stops ALARM

ESC= Removes either LINE NL Feeds paper up 1-line loop-back FEED Lights I NTR PT Moves print-�.Jad to Interrupt RETURN CR Disables keyboard left-hand marg'-; (200ms state O) Rings bell BACK Moves print-head 1-character SPACE BS left or rings bell if at EOT BS left-nand margin DS R, CTS, CD or Puts terminal in TERM DR oft> 450 ms READY mode BEL Rings bell Esc> Prevents character that follows ESC or character other Moves print-head from being printed th�n CR �hen to left-hand margin - ESC I Sets left-hand margin at pnnt-pos1t1on at . Feeds paper up 1 -I me (lower-case L) print-position right-hand margin Puts control or ESC r Sets right-hand margin at character and others (lower-case R) print-position that follow into Clears margins printer buffer until ESC X Moves print-head to print-head reaches (lower-case X) left-most location left-hand margin, at which time printer Permits print-head to ESC m operates at 4 7 cps proceed past left or ) (lower-case M) until buffer empty right margin, once � � � __ (no rec'd dat l s ) I Feeds paper up 1-line _ ESC w (lower-case W) Moves print-head to Mode Diagram for KSR with an EIA or TTL Interface left-hand margin The diagrams that follow show all of the possible ways in which a KSR terminal with a TTL or an EIA

Key bo ard interface can be operated via operator and on-line When in When in DATA mode Entry of controls. It includes modes and mode changes de· LOCAL mode Sends Control & Control scribed earlier under operator and on-line controls plus additional possibilities which may be of interest. ESC > Flashes ALARM Flashes ALARM For ready reference relative to the mode diagrams, Turns on AL * Turns on AL * the following brief descriptions are included:

ESC < Flashes ALARM Causes no action In the LOCAL mode the LOCAL key is litt and TR/ DTR* is off. Possibly the terminal is being used for Turns on DL * off-line operation. Goes to DATA if In the DATA mode the DATA key is litt, TR/DTR* DR/DSR", CD* & CTS* turn on, is on, and a data (send/receive) connection has been but DATA does established with a remote device. While in this mode not light receipt of interrupt (ZOOms state 0) prevents further sending from the terminal (but does not prevent Permits off-1 ine reception) until the INTRPT key is depressed. operation until (Depression of the key at other times sends 250ms & DATA lights state 0 to halt the remote device when it is sending.) rec'd data is printed In the TERM READY mode the TERM READY key is litt, TR/DTR is on and the terminal will switch to & ESC = Stops ALARM Stops ALARM the DATA mode when DR/DSR*, CTS* CD* turn on. Turns off Turns off AL*&DL" AL"&DL" tWhenever the LOCAL, DATA or TERlVI READY key is lit, the other two are not. tNo action occurs if transmitted when teleprinter in full­ duplex mode (unless being echoplexed) *Leads on TTL or EIA interface (note on previous page) Page 23 of 46 43 Part 2, Article 1

Mode Diagram forKSR with

(' EIA Interface

....--- D =Depress ® S =Send D-LOCAL R =Receive • •D-PRINTER TEST Interface leads: (C) • Raise cover CD = Carrier Detect •Turn power off CTS =Clear To Send • Remove paper DSR = Data Set Ready DSR. CTS & •Low paper DTR =Data Terminal • CD On (friction feed printer) Ready >- 0 cd: © @ *Raising cover w 0: prevents • R-8 N Ls after sending or :2: paper out (pin fed printers) 0: @ receiving w @ •D-LOCAL (without turning •D-PRINTER TEST off DTR or changing mode) --��• •Turn off power tcannot leave © LOCAL mode �f if cover up, •DSR off > 450 ms paper out, or •CTS off > 450 ms power off. LOCALt •CD off> 450 ms Power off also tho prevents off-line •0-TERM c Turns operation of KSR READY Off DTR & turns off LOCAL •R-EOT ( } rfor 50 ms light

Mode Diagram forKSR with TIL Interface

D =Depress ® S =Send •D-LOCAL R =Receive •D-PRINTER TEST Interface leads: © • Raise cover DR = Data (Set) Ready •Turn power off TERM TR =Terminal Ready nL/\r"'\V •Remove paper <::> •Low paper •DR On *Raising cover ..$' lfriction feed printer) � prevents ., >- � sending or 0 © @ receiving cd: §' (without turning w «!rv • R-8 N Ls after 0: off TR or paper out (pin fed printers) :2: @ changing mode) 0: •D-LOCAL w 1- @l •D-PRINTER TEST I tcannot leave •Turn off power [;]n 0 LOCAL mode -- • - if cover up, © paper out, or power off. •DR off>450 ms �f Power off also th prevents off-line •0-TERM oc LOCALt Turns operation of KSR READY Off TR & turns off LOCAL ( •R-EOT } rfor 50 ms light Page 24 of 46 Issue 3

Operation of a KSR with '� DC-20 to 60 ma Interface

[\ I ·���,, ���'I I� �1 � ,�, ,, ON-UP HALF-UP 30-UP TERM PRINTER DATA INTRPT ALARM PARITY DUPLEX CPS LOCAL TEST READY OFF-ON FULL-ON 10-DN

BACK 1 SPACE "' � RlnlDTUmlm LJr:-G1 L__:j RETURN

cAPs ]LOCK( m1

1<111>11J?I LINE SHIFT SHIFT J · ill [lJ;l ill FEED l �C { ffilffii�WflrelllWIIllnlrnl TR l

Typical Operator Procedures To Set Margins (in DATA or LOCAL mode) �;:' enter on the keyboard: ·.·)·. To Send or Receive: ESC x (lower-case X) Depress TERM READY if not lit As many SPs as there are spaces to the Be sure DATA is lit desired left-hand margint Begin sending or receiving data ESC 1 (lower-case L) As many SPs as there are spaces to the To Interrupt Remote Sender: desired right-hand margint Depress INTRPT (briefly lights) ESC r (lower-case R) Reception should stop RETURN If remote operator present: Margins have now been set to allow printing to Send data explaining interrupt begin at the left-hand margin and end 1-character If no remote operator present: ahead of the right-hand margin (e.g. if margins are set at 10 & 70 on the print-position scale, a 60- Wait for instruction from remote device character line has been allowed for, beginning or disconnect with the first character at 10 and ending with the last character at 69). To Disconnect: Depress LOCAL or send EOT To Clear Margins: Enter on the keyboard: tThe print-head pointer points to the position ESC x (lower-case X) where the next character will be printed only after a 1-second delay in motion (due to the printer's This clears margins and also moves the last character visibility feature)- print-head to the left-most location ;� Page 25 of 46 43 Part 2, Article 1

(' Operator & On-Line Controls & Indicators for KSR with DC-20 to 60 rna Interface I§'' -$\'§1 � LOCAL I Lit if in LOCAL modet � Lit when: Flashes during: Paper out AL* on or low Puts terminal in LOCAL mode: Cover up Permits off-line operation PRINTER Removes effect of received interrupt TEST Turns off AL* depressed

Paper Out or Low � (pin & friction feed printer, respectively): Lit if in DATA modet Lights ALARM & rings bell

D Puts terminal in LOCAL mode: Indicates when data can be sent or received after receipt of 8 NLs if in DATA mode & if pin-feed printer

I"' 'f'l Prevents entry into DATA mode TERM I Lit if in DATA modet READY Cover Up:

Lights ALARM

Puts terminal in DATA mode Prevents sending or receiving without ( removing from DATA mode Prevents entry into DATA mode Lit if interrupt (200ms state 0) rec'd (Bell rings) Bell Rings: tj 7 spaces ahead of and at right-hand margin if If depressed when not lit: print-head moving right

Sends interrupt (250ms state 0) at left-hand margin on entry or receipt of (to halt transmission from remote device) backspace

on receipt of interrupt (200ms state 0) If depressed when lit: on paper out or low Removes effect of received interrupt

Turns off indicator

� PRINTER TEST On if held down, off if up

Puts terminal in LOCAL mode

Causes entire character set to be continuously printed (as shown below)

tEither LOCAL is lit or DATA & TERM READY (, are lit

• 1"M�Z&'Cl*+,-,/0123456789:;<=>'@A8CDEFGHIJKLHNOPQRSTUVUXYZ[\]"_'abcdefghi kl�noparstuvwxyz{:}· • 1"M$%&'11*+,-./0123456789:;<=>?@ABCDEFGHIJKLHNOPQRSTUVUXYZ[\J"_'abcdefghi kl�noparstuvwxyz{:}- Page 26 of 46 Issue 3

ON-UP Detector on if up, off if down On if held down, off if up PARITY Depress to lock down, again to release OFF-ON (Does not affect sent parity) G '------' Permits entry of shift-positiori characters · on keyboard If on:

Causes terminal to print symbol• on receipt of character with even vertical parity error On if held down, off if up If off: B Causes terminal to print character received Permits entry of shift-position controls on regardless of its parity keyboard

HALF-UP In half-duplex mode if up, If depressed with CTRL key: DUPLEX full-duplex if down FULL-ON Depress to lock down, again to release Causes return & line feed RETURN (except in full-duplex mode) without sending on-line controls Half-Duplex mode:

Permits terminal to send or receive, but not both at same time

Causes terminal to print characters and obey On if held down, off if up �controls sent from keyboard B Full-Duplex mode: Causes character and on-line control keys depressed at Permits terminal to send & receive, both at the same time as the REPT key to be repetitively sent ) the same time until released

Causes terminal to ignore characters and controls sent from keyboard (unless being echoplexed in full-duplex) (Power) Prevents CTRL plus RETURN function On if LOCAL, DATA or TERM READY lit 30-UP [ff CPS 30 char/sec if up, 10 if down Power Off: 10-DN Depress to lock down, again to release Disables terminal

Removes effect of rec'd interrupt If up: Turns off AL* Causes terminal to send and receive at 30 char/sec (300 wpm) (300 bit/sec) Power On:

If down: Enables terminal

Causes terminal to send and receive at 10 char/sec Clears margins {100 wpm) (110 bit/sec) Moves print-head to left-most location

� On if down, off if up L:_j Depress to lock dmvn, again to release

Permits keyboard entry of upper-case letters without *on interface: having to use SHIFT and without having to unlock AL = Analog Loop CAPS LOCK to enter unshifted characters such as numbers Page 27 of 46 43 Part 2, Article 1

(" Operator & On-Line Controls & Indicators for KSR with DC-20 to 60 rna Interface (Cont'd)

When in Transmission t or Reception Reception I Keyboard When in DATA mode DATA of Control in DATA mode of Control Entry of mode or On-Line Sends Entry of Control Control Control in LOCAL mode ESC< Flashes ALARM

Disables keyboard LINE NL Feeds paper up 1-line except for ESC = FEED

Moves print-head to RETURN CR left-hand margin Stops ALARM I ESC= Removes either BACK Moves print-head 1-character loop-back SPACE BS left or rings bell if at left-hand margin BS Lights INTRPT Interrupt Disables keyboard BEL Rings bell (200ms state 0) Rings bell Prevents character that follows j ESC from being printed I EOT Puts terminal in LOCAL ESC I Sets left-hand margin at mode (lower-case L) print-position Esc>

ESC r Sets right-hand margin at or character other Moves print-head (lower-case R) print-position than CR when to left-hand margin print-position at Clears margins Feeds paper up 1-line ESC X right-hand margin Moves print-head to (lower-case X) Puts control or left-most location ( character and others Permits print-head to that follow into ESC m proceed past left or. printer buffer until (lower-case M) right margin, once print-head reaches left-hand margin, Feeds paper up 1-line ESC w at which time printer (lower-case W) Moves print-head to operates at 4 7 cps left-hand marg�------until buffer empty _,_ (no rec'd data lost )

Keyboard When in Wh•n ;n DATA mod• Entry of· LOCAL mode Sends Control & Control I ESC > Flashes ALARM Flashes ALARM ' Turns on AL * Turns on AL *

ESC < Flashes ALARM Cau ses no action

Goes to OATA, but OATA does not light

Permits off-line operation until DATA lights & rec'd data is printed

ESC = Stops ALARM Stops ALARM

Turns off Turns off (� AL* AL*

tNo action occurs if transmitted when teleprinter in full­ duplex mode (unless being echoplexed) Page 28 of 46 Issue 3

Operation of an RO

� � � PRINTER TERM RESET DATA ALARM TEST READY

Operator & On-Line Controls & Indicators for an RO with a 103-Type Built-In Modem

'�" ,'§1 TERM Lit if in TERM READY mode RESET I I READY (See RESET for related control)

Puts RO in TERM READY mode:

Causes return & line feed without sending on-line controls Lit if in DATA mode Turns off ALARM light if alann condition has LJ� been removed Indicates when data can be received Puts RO in DATA mode on receipt of call if:

phone on-hook or no phone

carrier received within 20 sec Lit when:

plus @ � Paver nut or low

ALARM Cover up PRINTER TEST depressed ) PRINTER ' on if held down, off if up TEST Paper Out or Low (pin or friction feed printer, respectively):

Causes entire character set to be continuously Lights Alann printed (as shown below) Prevents entry into DATA or TERM READY plus @ mode

plus @ after receipt of 8 NLs if pin feed printer

@ Cover Up: Lights ALARM

Causes disconnect if: Prevents entry into DATA or TERM READY in DATA mode mode

phone on-hook or no phone Prevents receiving in DATA mode (without causing disconnect) or Causes transfer from data to talk if:

in DATA mode Bell Rings:

phone off-hook 7 spaces ahead of & at right margin if print-head moving right rec 'd carrier turns off At left margin on receipt of BS Removes loop-back On receipt of interrupt (200 ms state 0)

On paper out or low

- w :1 • 1 "U U ·' ( l* + • I 0 1 2 3 456 7 8 9 : ;<=>?�ABC DEF GHI J K L 1iN 0 P Q R STU V UXY zr \ J _ abc de f :3 hi j k l11 nop q rstu v 'Y: { : } - "" • 1"M$%!'1lt+,-,/0123456789:;<=>7�ABCDEFGHIJKLHNOPORSTUVUXYZ[\J"_'abcdefghijkl�nopqrstuvwxvz{:}-, .. ) Page 29 of 46 43 Part 2, Article 1

Re<:eption When in mode of Control DATA ( ESC< Flashes ALARM Reception When in DATA mode Puts terminal into digital loop-back of Control -- Stops ALARM NL Feeds paper up 1-line ESC= Removes either loop-back CR Moves print-head to left-hand margin--- Lights INTRPT Moves print-head 1-character left Interrupt BS Disables keyboard or rings bell if at left-hand margm (200ms state 0) Rings bell BEL Rings bell -- EOT Prevents character that follows ESC from being printed 2 sec state 0 Puts terminal in TERM READY mode 450ms car'r off if phone on-hook or no phone ESC I Sets left-hand margin at (lower-case L) print-position ESC> ESC r Sets right-hand margin at or character other Moves print-head to left-hand margin (lower-case R) print-position than CR when Feeds paper up 1-line print-position at ESC x Clears margins right-hand margin Puts contr01 or character and others (lower-case X) Moves print-head to left-most locat1on that follow in''- printer buffer until ESC m Permits print-head to proceed past print-head reaches left-hand margin, (lower-case M) left or right margin, once ?t which time printer operates at 4 i cps until buffer empty (no rec'd ESC w Feeds paper up 1-line data lost) (lower-case W) Moves print-head to left-hand marg1n --·--

Mode Diagram for RO with 103 Interface

0 =Depress R = Receive

Mode r Off-Hookt>hOOOI I

e Take phone off-hook

( ePut phone on·hook I I I • 0-AESET & I R-carner on (or vice versa) li not within 20sec � I < @ £ I j e < 0 0 I � � Connected . ., o;\ I J ·- � I -a: r- � -� "' 0�� ---iI .,.�•. WN U �-­ I I I • r=o:��-·-] � a: a: a: & ••• "' .,. E 6 � eTake phone off-hook • a:

ePut phone on·hook

• o ·�/."'-s> � ,.,_'<-.;. *'ol.r*'";:�r '?'1.­ .,.,_ ,.,_'<-9:- � v_,?V.,��" �) '?,_ -���efl/� �t. «'..!',_

' eTake phone off--hook

•Put phone on--hook I (. @ ® e 0-PRINTEA TEST • R-8 NLs after I *Raising cover t Cannot leave a Raise cover paper out prevents Non- AESET mode e Tum power off (pin fed printer) I receiving if cover up, paper out (without causing or low or power off. • Remove paper e 0-PAINTEA TEST • Turn power off disconnect or • Low paper mode change) (friction feed printer) Page 30 of 46 Issue 3

Operator & On-Line Controls & Indicators for RO with EIA or TTL Interface Lit when: � Paper out or low EJ Cover up L:J PRINTER TEST depressed Puts RO in TERM READY mode:

Causes return & line feed without sending on-line controls Paper Out or Low Turns off ALARM light if alarm condition (pin & friction feed printer, respectively): has been removed Lights ALARM Tum:'! on TR/DTR* & ;_;ermits terminal to enter Prevents entry into DATA or TERM READY mode DATA mode when DR/DSR*, CTS* & CD* turn on Turns off TR/DTR* after receipt of 8 NLs if pin feed printer Turns off TR/DTR* for 50 ms if DATA lit

PRINTER Cover Up: On if held down, off if up TEST Lights ALARM

Prevents entry into DATA or TERM READY mode Causes entire character set to be continuously Prevents receiving in DATA mode printed (as shown below) (without turning off TR/DTR*) Removes effect of received interrupt

Turns off TR/DTR* Bell Rings: 7 spaces ahead of & at right margin if print-head � �) TERM Lit if in TERM READY mode moving right READY (See RESET for related control) At left margin on receipt of BS

On receipt of interrupt (200 ms state 0) � On paper out or low � Lit if in DATA mode Indicates when data can be received

*On RO Interface: TR/DTR= (Data) Terminal Ready, DR/DSR= Data (Set) Ready, CTS =Clear To Send, CD= Carrier Detect

Reception Reception When in DATA mode When in DATA mode of Control of Control

NL Feeds paper up 1-line ESC < Flashes ALARM

CR Moves print-head to left-hand margin Turns on DL •

Moves print-head 1-character left Stops ALARM BS or rings bell if at left-hand margin ESC= Removes either loop-back BEL Rings bell Interrupt Lights INTR PT Prevents character that follows (200ms state 0) ESC Rings bell from being printed EOT ESC I Sets left-hand margin at Puts terminal in TERM (lower-case L) print-position 450ms car'r off READY mode ESC r Sets right-hand margin at ESC > (lower-case R) print-pos1tion or character other Moves print-head to left-hand margin ESC X Clears margins than CR when Feeds paper up 1-line (lower-case X) Moves print-head to left-most location I print-position at right-hand margin Puts control or character and others �J ESC m Permits print-head to proceed past I that follow into printer buffer until (lower-case M) left or right margin, once I I print-head reaches left-hand margin,

ESC w Feeds paper up 1-line at which time printer operates at I 47 cps until buffer empty (no rec'd (lower-case W) Moves print-head to left-hand margin data lost) Page 31 of 46 43 Part 2, Article 1

Mode Diagram for RO with

('" EIA Interface

•DSR off > 450 ms Interface eCTS off > 450 ms leads: •CD off > 450 ms CD - Car'r Detect •R-EOT (Turns off DTR 50 CTS -Clear To Send for ms) ® DSR - Data Set Ready eO-PRINTER TEST DTR -Data Term'l Ready •DSR, CTS & CD On •Raise cover *Raising cover •Turn power off prevents • Remove paper sending or •Low paper receiving (friction feed printer) (without turning 1-0: @) @ off DTR or we.. (/)Q) changing mode) W<�> a:� ® fDTRl IQi tcannot leave � oa: • R-8 N Ls after Non-Reset if • • paper out cover up, fDTRl (pin fed printer) paper out or low l_Q!!J eO-PRINTER TEST or power off. Turn power off

Non - RESETt (

Mode Diagram for RO with TTL Interface

Interface •R-EOT (Turns off TR leads: for 50 ms) ®

DR= Data •D-PRINTER TEST (Set) Ready � •DR On • Raise cover (/) *Raising cover TR =Terminal w •Turn power off Ready 1- prevents • Remove paper a: sending or w 1- •Low paper receiving z (friction feed printer) (without turning 1-0: @ we.. @ off TR or r.n., changing mode) w"' ® ITRl a:� IQi tcannot leave � oa: • R-8 N Ls after • • Non-Reset if paper out cover up, rTRl (pin fed printer) paper out or low LQ!!J e D-PRINTER TEST or power off. Turn power off

( Non - RESETt Page 32 of 46 Issue 3

Operator & On-Line Controls & Indicators for ,\, RO with DC-20 to 60 rna Interface Lit when: � Paper out or low Cover up B L::J PRINTER TEST depressed Puts RO in TERM READY mode:

Causes return & line feed without sending on-line controls Paper Out or Low Turns off ALARM light if alarm condition (pin & friction feed printer, respectively): has been removed Lights ALARM Puts terminal in DATA mode Prevents entry into DATA or TERM READY mode Removes terminal from DATA mode after PRINTER receipt of 8 NLs if pin feed printer On if held down, off if up TEST

Cover Up: Causes entire character set to be continuously printed (as shown below) Lights ALARM

Removes effect of received interrupt Prevents entry into DATA mode Prevents receiving without removing from Removes terminal from DATA mode DATA mode

[§3J TERM 1 Lit if in DATA mode READY Bell Rings: 7 spaces ahead of & at right margin if print-head \C) moving right � At left margin on receipt of BS L.:::J Lit if in DATA mode On receipt of interrupt (200 ms state 0)

On paper out or low Indicates when data can be received

*On RO Interface: TR/DTR =(Data) Terminal Ready, DR/DSR= Data (Set) Ready, CTS =Clear To Send, CD= Carrier Detect

Reception Reception When in DATA mode When in DATA mode of Control of Control l

NL Feeds paper up 1-line ESC < Flashes ALARM

CR Moves print-head to left-hand margin Turns on DL * I Moves print-head 1-character left Stops ALARM I BS ESC= or rings bell if at left-hand margin Removes either loop-back I BEL Rings bell Interrupt Lights INTRPT Prevents character that follows (200ms state 0) I ESC Rings bell from being printed EOT I ESC I Sets left-hand margin at (lower-case L) print-position 450ms car'r off Puts terminal in Non-RESET mode I

ESC r Sets right-hand margin at ESC > I (lower-case R) print-position I or character other Moves print-head to left-hand margin ESC Clears margins than CR when X Feeds paper up 1-line (lower-case X) Moves print-head to left-most location j print-position at 1 I right-hand margin Puts control or character and others ESC m Permits print-head to proceed past I that follow into printer buffer until I! (lower-case M) left or right margin, once I l print-head reaches left-hand margin, i at which time printer operates at ! ESC w Feeds paper up 1-line I I 47 cps until buffer empty (no rec'd I (lower-case W) Moves print-head to left-hand margin I ' data lost) I ______' L_

Page 34 of 46 Issue 3 COMPONENT DESCRIPTIONS 43 Features ·� The 43 KSR terminal consists of 5 main components: General keyboard, printer, logic, interface unit and power 10 or 30 char/sec (110 or 300 bps) KSR & RO supply. An RO consists of all of these except the operator selectable on KSR keyboard. In both configurations all components Interface: TTL-Serial, are housed in a single table-model cabinet. 103-type Built-In Modem, EIA-RS232/DC-20 to 60ma, or The 43 keyboard most closely matches the keyboard ·Dual (Line+ Aux.) each EIA/DC of the Model 40 line of terminals and the keyboard Half or Full-Duplex Operation on KSR, of newer-style electric keyboards with regard to operator selectable character locations, key size, and key touch. Most used ASCII control locations closc'y match those Manual or Automatic-Answer of incoming calls found on 33 and 35 terminals, skv<' the 43 will be on KSRt, operator selectable. Auto answer on ROt used mainly in systems presently using those type KSR Switches to Auto Answert of terminals Term 'l Ready T or Local f on Disconnect RO switches to Term'l Readyt'f or Non-Resetf

The full ASCII, dot-matrix, impact printer is available Disconnect on EOT or do not in a friction and a pin feed type, to accommodate Generate Even Vertical Parity or 8th bit always plain-paper print-outs and to accommodate fanfolded state 1 form and/or 132 column print-outs, respectively. Analog (KSR) and Digital (KSR & RO) Loop-Back Testst and Printer Test The logic is contained on a single circuit card located along the inside bottom of the cabinet. The inter­ Only 5 main components face unit is another circuit card located in the rear Compact (KSR cr RO): 5-1/2" H, 18" W, 21-1/2" D, (bustle) of the teleprinter cabinet, as is the power 30 lbs supply. 115 VAC @ 50/60Hz 75 W max. 10 ft 3-wire power cord included The features of 43 teleprinter and its components are ) summarized on the next page, for ready reference. Keyboard (not on RO)

Typewriter format: Model 40 design and touch Often-used ASCII controls located as on Model 33

Generates 128 ASCII characters and controls

N-Key Rollover: 8-character burst buffer

Caps Lock, Back Space, Repeat, Return, Line Feed, Shift and Control Keys

Controls and Indicators

KSR Controls: LocalT f or Local/Talkt, Data t, Auto-Answert or Term'l Readyr'fInterrupt, Printer Test, Parity On/Off, Half/Full Duplex and 10/30 cps

KSR Indicators: Alarm, interrupt, mode, test and power on

RO Controls: Reset and Printer Test

RO Indicators: Term '1 Ready, Data and Alarm

twith Built-In Modem 'fwith.:.. EIA or TTL interface 'fwith DC interface .,J Page 35 of 46 43 Part 2, Article 1

Printer Options (chosen via switches inside 43) ( Prints 4 x 7 dot-matrix upper and lower-case characters via 9-wire print-head Elect option 431a for most Distinguish Between applications. Options 431b Zero and Oh by Printing Print wires are spring-driven, magnetically-held, and and c are for systems that electrically released for minimum power consumption require the zero or oh, zero narrower than oh 431aF respectively, to be slashed, • Prints 94 ASCII characters plus for control SUB. slash on zero 431b and where the absence of the Does not print DEL nor character after ESC slash would cause data to slash on oh 431c be misread. Prints • on receipt of even parity error instead of printing received character or performing received Speed Maximum Line Length control, or pri"lts or performs regardless of parity, (RO only) KSR & RO, operator selectable on KSR F F Q.U...: '21 132 char/line 432a 30 cps 436a Distinguishes between zero and alpha 0 by printing 10 cps 436b zero narrower than 0 or by printing slash on either F -- --- ..... 80 char/line 432c 1 zero or 0 oct c"C l KSR speed '0 yes 432d Friction Feed: Prints up to 72 or 80 char/line at 0 Q) is changed ·.;::; u.. 72 � - 10 char/in & 6 line/in on standard 400 ft 8-1/2-in . � c s on keyboard. "'·- char/line c wide rolled paper U..Q. (.)Q) no 432b Pin Feed: Prints up to 72, 80 or 132 char/line at 13 char/in & 6 line/in on pin-fed fan-folded forms For most applications, elect option 432a for 8-1/2-in long, 12-in wide pin fed printers and option 432c for friction fed printers.

Impact prints an original and 1 (friction fed) Options 432b and d permit pin and friction or up to 2 (pin fed) copies fed printers to match traditional teleprinter print-line lengths. Opt'nn 432a cannot be Left and Right Margin Set and Clear, elected for a friction fed printer. operator (KSR) and on-line controllable

Characters not sent when in half-duplex mode (KSR) ( Disconnect on EOT Elect option 433a for most if printer at right margin (controls are sent) applications, to disconnect yes 433aF Characters received at right-hand margin can be either or turn off TR/DTR for 50 ms on EOT (End of transmission) not printed or printed after causing automatic return no I 433b & line feed, to accommodate occasional garbled line­ ending sequences in received data If the system does not use even vertical parity and it 64-character Received Data Buffer: Timing characters Send Even Vertical Parity (not on RO) is desired to generate bit not required for return & line feed or multiple back 8 of all characters and yes 434aF space controls sent from the no 434b terminal as a state 1 (mark), 47 char/sec print-out rate when data waiting in buffer elect option 434b. Multiple lines feed at 30 line/sec Print • on receipt of This choice Automatic disconnect on paper-out after 8 received NLs ! even parity error instead on KSR Last Character Printed Visible of printing received is made character or performing after 1-second delay in printing on the received control (RO only) keyboard. Bell rings before & at right margin & on receipt of BEL F yes 437a Print-position indicator scale no 437b Paper Guide and Supply Holder

Cartridge-loaded print-ribbon, continuously inked Automatic Return & Line Feed Elect option 435a for most at Right-Hand Margin applications to prevent loss of data due to occasional garbled line ending sequences yes 435aF in received data. no 435b

(, EIA/Current No option is elected. EIA/Current interface See Interfaces wired at connector per desired interface.

F indicates the option activated at the factory Page 36 of 46 Issue 3

COMPONENT OPERATION

Printer

The 43 printer component prints characters via a dot­ matrix method that utilizes a single column of print wires to produce impact printing. It does not con­ sume large amounts of electrical power while printing. This is because the print wires are spring driven, magnetically held and electrically released, rather than selenoid driven and retracted.

Below is a representation of two characters printed by the 43 printer as an illustration of the dot-matrix method of printing used.

12 34567 1234!';;67

2 2 Driving these 9 print wires is a print head consisting 3 3 of 9 basic units, 5 on the left and 4 on the right, as illustrated above. 4 4

5 5 Below is a greatly exagg�rated and simplified illustra- tion of one of the 5 print units on the left. 6 6

7 7 :)

8 8

9 9

The left-hand character is an upper-case Q, the right­ hand a lower-case q. As shown, the printer prints the characters by impacting a column of wires up to 7 at a time and up to 7 times in a row, depending on the character being printed.

After each character is printed, a lead screw moves Spring-.. the print-head containing the wires to the next print­ position.

On a friction feed printer printing at 10 char/in, the dot columns are slightly further apart than they are on a pin feed printer printing at 13 char/in.

The C shaped part is spring steel and is twisted and held by the magnet as shown. When operated, an electrical pulse in the coil cancels the effect of the magnet on the spring, allowing the spring to push the print wire into the print ribbon and onto the paper as indicated by the arrow. The coil does not move with the spring but allows it to move between preset stops within the coil core. ;',�',;.J·· F To make up the print head, 5 of these units are merged with 4 left-handed versions of the same mechanism to produce a column of 9 print wires. Page 37 of 46 43 Part 2, Article 1

TECHNICAL FACTS

(� Code

ASCII

Controls Characters

' (a NUL OLE SP 0 p p 0 0 I SOH DCl 1 A Q a q I I 10 II STX DC2 2 B R b r 1 ETX DC3 # 3 c s c � 0 EOT IX:4 s 4 D T d t I 0 ENQ NAK (�) 5 E u e u l I I I I 1 ACK SYN & 6 F v f v 1 / BEL ETB 7 G w g w

BS CAN ( 8 H X h X 0 HT EM ) 9 I y I y 0 ( * NL SUB J z J z 1 VT ESC + ; K [ k { 1 I FF FS < L \ I I 0 - CR GS = M 1 m } 1 "' - so RS > N , n 1 SI us I ? 0 - 0 DEL ... il31� 0 1 0 1 0 1 0 1 -5 0 1 0 1 -6 BITS 0 1 7

NUL -Null BS -Back Space OLE - Data Link Escape CAN -Cancel SOH -Start of Heading HT -Horizontal Tab DC1 -Device Control 1 EM -End of Media STX -Start of Text NL -New Line DC2 -Device Control 2 SUB -Substitute ETX -End of Text VT -Vertical Tab DC3 - Device Control 3 ESC -Escape EOT -End of Transmis'n FF -Form Feed DC4 - Device Control 4 FS -Field Separator ENQ -Enquiry CR -Carriage Ret. NAK -Negative Acknowledge GS -Group Separator ACK -Acknowledge SO -Shift-Out SYN -Synchronous AS - Record Separator BEL -Bell Sl -Shift-In ETB -End of Trans'n Block us -Unit Separator

(,, SP-Space DEL-Delete Page 38 of 46 Issue 3 Terminal Vocabulary ,,,, Keyboard Vocabulary: Environmental Requirements . All 128 ASCII characters & controls can be sent from Temperature the 43 keyboard. ° Storage: -40 to 140 F Printer Vocabulary: Operating: 40 to 110°F 95 characters can be printed. This includes 94 of the 96 characters shown on the ASCII code chart plus the Relative Humidity symbol • , which is printed on receipt of the control Storage & Operating: 2 to 95% SUB and on receipt of a character or control with an (non-condensing) even parity error if parity is detected.

Altitude

Physical Facts Shipping: Sea level to 50,000 ft

Operating: Sea level to 10,000 ft Rolled Paper Holder Electrical Requirements Fan-Folded Paper Holder 115 V AC @ 50/60Hz 75 W Max

Routine Maintenance ~�-·1 Once per year

Operator's Manual r�_/.1/2" 999-300-126

Print Ribbon ) 430035

Reliability

Maximum of 3 troubles per every 100 terminals per month

2000 hr print-head life 5 million character print-ribbon life

Pedestal

" 25 � Page 39 of 46 43 Part 2, Article 1

Paper & Printing Specifications

Pin-Fed Friction-Fed (' Fan-Folded Forms Rolled Paper

7/8" �I - �- , +'!- "' " 1 0 h o . • ; "�'-' ,/m .... ,. :_:•.;:::: . · :_:· •• ·- -.w;; ••>- · .'.'��· ·- �·- 1 ) � - g. �'"'" ·- 5- '"-P'' •• . •·->- lb .. - . .,. · 4- . u ... p ..._ .,_" to 2 ' co::::- "'-""• M (12-!b

(

SENT AND RECEIVED DATA

Applies to SEND and RECEIVE leads on TTL, EIA and DC interfaces (Shown here to avoid repetition elsewhere.)

On 0

State Sffilt 1 2 ___.I 3 4 I 5 I 6 Off I I I 7 1;:,,� 1.=:

(Shown is a perfect waveform for the ASCII character M with even vertical parity)

The parity (8th) bit is sent in state 1 if even parity is not generated

"'' Page 40 of 46 Issue 3

103-TYPE BUll T-IN MODEM INTERFACE

Interface- Pin Assignments - - Physical � 1 - - 2 TI (TIP) - 3 Phone Rl (RING) 4

5 L..... l - 43 KSR - (REAR VIEW) r

�:l OM* - Cord that was -J attached to

T (TIP) "0 phone is attached I - "' 3 l Line 0:: to KSR � R (RING) I 4 + a; F "' DM1* t5 5 '- ') J �� *control leads for line exclusion on key telephones . �� Sent when 43 Sent when 43 FSK (Analog) Originating Answering Interface FCC Registration No. AT793C-70162-DT-E f1 f2 I Ringer Equivalence 0.3 State 0 (space) 1070Hz 2025Hz I Ringer Type A State 1 (mark 1270Hz 2225Hz I Page 41of 46 43 Part 2, Article 1

( DUAL (LINE+ AUXILIARY) INTERFACE Both EIA-RS232/DC-20 to 60 rna

Physical Electrical

EIA (RS232)

State 0 (space) On +3 to +25 VDC

State 1 (mark) Off -3 to -25 VDC

Non-EIA Portion

On +3 to +25 VDC AL Off -3 to -25 VDC

Auxiliary On +2.5 to +5.0 VDC Interface, PO Off +0.0 to +0.4 VDC 25-pin receptacle DC Undefined

Line Interface

A mating 25-pin receptacle connector ( is available from: Current (20/60 maDC) Body Pins Shell State 1 (mark) 20/60 maDC*

Teletype: 145913 173716 186727 State 0 (space) OmaDC Amphenol: 17-304-01 17-763-02 Cannon: 239-13- 99070 *20 to 60 maDC at 5 to 130 VDC.

A mating 25-pin EIA cable & (receptacle on 1end, plug on other end) Send Receive leads connect to separate, is available from Teletype: non-inductive, optically-isolated + to - circuits inside the 43. 7ft -408065 25ft- 408067 & 12ft - 408066 50ft - 408068 Send circuit generates receive circuit accepts current on-off telegraphic signal from externally supplied 20/60 maDC. Auxiliary Interface Receive circuit input resistance is A mating 25-pin plug connector approximately 50 ohms. is available from:

Body Pins Shell

Teletype: 341977 173715 341873 Amphenol: Cannon:

Pin Assignments Pin Assignment Descriptions (, (next page) (next page) Page 42 of 46 Issue 3 ci:"' Pin Assignments �" ,;,

AUXILIARY LINE INTERFACE INTERFACE

Used for EIA-RS232

DTR DTR _.. .. 20 (CD) 20 (CD) .. R lt 22 (CE) � - DSR DSR 6 6 .... � (CC) (CC) � osst ""' 43 23 .. OS It KSR 12 � RTS RTS 4 __.. .. 4 (CA) (CA) .. CTS CTS � ... 5 (CB) 5 (CB) "'' SEND SEND (TO) (TO) ... ,.. 2 (BA) 2 (f;!A) ..

DATA SET AUXILIARY CD/RLSD CDIRLSD &/OR DEVICE(S) 8 (CF) 8 (CF) ""' OTHER r" RECEIVE (RO) r" RECEIVE (AD) DEVICE(S) 3 3 (BB) � (BB) ...

DC � DC 24 24 ...... PO ALt .. _h .. 17 25 ..

"',') ,, SG SG 7 (AB) 7 (AB) PG PG 1 (AA) 1 (AA)

For limited-EIA applications connect pins 5, 6 & 8 (& possibly 20) together to permit operation

Used for DC-20 to 60 ma

+ + 14 14

- SENDt� -SENDt --)- 13 13 - -

SIGNAL + + LINE AUXILIARY 16 43 16 KSR &/OR DEVICE(S) E V t ... REC I E - .... RECEIVET- OTHER 15 15 DEVICE(S) - -

DC DC 24 24 ...... PO Alt _...., 17 25 ->

For Full-Duplex current-loop applications connect pins 2 & 6 on auxiliary interface together and connect pins 3, 4, 5, 6 & 8 on line interface together.

For Half-Duplex current·loop additionally connect pins 14 & 15 together on line interface.

tcertain KSRs either do not have this pin or do not perform the associated function. Page 43 of 46 43 Part 2, Article 1

( Pin Assignment Descriptions

AUXILIARY INTERFACE, LINE INTERFACE

Used for EIA-RS232

DTR (Data Terminal Ready)- Off turns DTR (Data Terminal Ready)- Off if KSR in off line interface DTR LOCAL mode or auxiliary interface DTR off. Turns off for 50 ms if EOT received or DSR (Data Set Ready) -:On if KSR in LOCAL TERM READY depressed when in DATA mode. mode or if line interface DSR, CTS & CD on. Also affected by paper supply & tests.* RTS (Request To Send)- On prevents 43 KSR Rlt (Ring Indicator)- On causes KSR to from sending answer-back send answer-back if DTR, DSR, CTS & CD on CTS (Clear To Send)- On if KSR power on DSR (Data Set Ready)- On puts KSR in DATA SEND (TD) (Transmit Data)- Tum on until mode if DTR, CTS & CD on. � varied per sent data. DSSt (Data Speed Selector)- Off or on, CD (Carrier Detect)/RLSD (Received Line respectively, indicates selection of Signal Detector)- On if KSR Power on 10 or 30 cps on KSR

RECEIVE (RD) (Receive Data)- Off until DSit (Data Speed Indicator)- Off or on, varied per received data respectively, switches KSR to 10 or 30 cps

DC (Device Control)'!'- Not defined. RTS (Request To Send)- On/Off on late/early Connected only to line interface DC. design KP when power on.

PO (Printer On-Off)'!'- Off prevents CTS (Clear To Send)- On puts KSR in DATA print-out of data except keyboard entered. mode if DTR, DSR & CD on. f SG- Signal Ground SEND (TD) (Transmit Data)- On if KSR in ( PG- Protected Ground LOCAL or TERM READY mode. Off if in DATA mode until varied per sent data.

CD (Carrier Detect)/RLSD (Received Line Signal Detector)- On puts KSR in DATA mode if DTR, DSR & CTS on. 'f

RECEIVE (RD) (Receive Data)- Tum on when KSR in LOCAL or TERM READY mode. Turn off when KSR in DATA mode until varied per received data.

DC (Device Control)'!'- Not defined. Connected only to auxiliary interface DC.

ALt (Analog Loop-back)T- Turns on when ESC> entered on keyboard:*

SG- Signal Ground

PG- Protected Ground

Used for DC-20 to 60 rna

SEND- Turn on until varied per sent data SEND- On until varied per sent data

RECEIVE - On until varied per received data RECEIVE- Turn on until varied per rec'd data

DC (Device Control)- Not defined. DC (Device Control)- Not defined. Connected only to line interface DC. Connected only to auxiliary interface DC.

PO (Printer On-Off)- Off prevents print-out ALt(Analog Loop-Back)-Turns on when ESC):. of data except keyboard entered. entered on keyboard.*

*See mode diagram & operator & on-line controls for additional detail

(, tCertain KSRs either do not have this pin or do not perform the associated function

'fNon-EIA

fOff > 450ms switches KSR from DATA to TERM READY mode r Page 44 of 46 Issue 3 ·�

EIA·RS232/DC-20 to 60 ma

Physical Electrical

EIA (RS232)

State 0 (space) On +3 to +25 VDC

State 1 (mark) Off -3 to -25 VDC

I menace, Non-EIA Portion 25-pin On +3 to +25 VDC plug AL Off -3 to -25 VDC

On +2.5to +5.0 VDC PO Off +0.0 to +0.4 VDC

DC Undefined

A mating 25-pin receptacle connector ) is availablefrom: Current (20/60 maDC)

Body Pins Shell State 1 (mark) 20/60 maDe*

Teletype: 145913 173716 186727 State 0 (space) 0 maDC Amphenol: 17-304-01 17-763-02 Cannon: 239-13-99070 *20 to 60 maDC at 5to 13 0 VDC.

A mating 25-pin EIA cable (receptacle on 1 end, plug on other end) Send & Receive leads connect to separate, is available from Teletype: non·inductive, optically·isolated +to - circuits inside the 43. 7ft- 408065 25ft- 408067 12ft- 408066 50ft - 408068 Send circuit generates & receive circuit accepts current on-off telegraphic signal from externally supplied 20/60 maDC.

Receive circuit input resistance is approximately 50 ohms.

Pin Assignments Pin Assignment Descriptions (next page) (next page) •<(' Page 45 of 46 43 Part 2, Article 1

Pin Assignments Pin Assignment Descriptions

(� for EIA-RS232 for EIA-RS232 - DTR (Data Terminal Ready)-Off if KSR in DTR LOCAL mode.' Turns off for 50 ms 20 (CD) if EOT received or TERM READY depressed � ..... Rlt when in DATA mode. 22 (CE) l....L � - Also affected by paper supply & tests.* DSR 6 (CC) � Rit (Ring Indicator}-On causes KSR to osst .... 23 ...... send answer-back if DTR, DSR, CTS & CD on os1t 12 ...._ DSR (Data Set Ready)-On puts KSR in DATA mode if DTR, CTS & CD on� RTS 4 (CAl � DSSt (Data Speed Selector)-Off or on, CTS DATA SET respectively, indicates selection of 5 (CB) �....- 43 SEND (TO) &/OR 10 or 30 cps on KSR KSR 2 (BA) .... OTHER DEVICE (S) DSit (Data Speed Indicator)-Off or on, respectively, switches KSR to 10 or 30 cps CD/ALSO 8 (CF) I....� RTS (Request To Send)-On/Off on late/early i..t. RECEIVE (RD) design KSR when power on. 3 (68) .. CTS (Clear To Send)-On puts KSR in DATA mode if DTR, DSR & CD on. f Alt 25 ..... SEND (TD) Transmit Data)-On if KSR in LOCAL or TERM READY mode. Off if in DATA mode SG until varied per sent data. 7 (AB) - PG CD (Carrier Detect)/RLSD (Received Line 1 (AA) ----1 Signal Detector)- On puts KSR in DATA mode ( ___J if DTR, DSR & CTS on. f

For limited-EIA applications connect pins 5, 6.& 8 RECEIVE (RD) (Receive Data)-Tum On when (& possibly 20) together to permit operation KSR in LOCAL or TERM READY mode. Tum Off when KSR in DATA mode until varied per received data. for DC-20 to 60 rna

+ ALt (Analog Loop-back)f-On when ESC> 14 entered on keyboard.*

-SENot _., SG -Signal Ground 13 - PG- Protected Ground

SIGNAL for DC-20 to 60 rna + LINE 43 SEND- On until varied per sent data 16 &/OR KSR OTHER .. RECEIVEt- RECEIVE-Tum On until varied per rec'd data DEVICE (S) 15 - ALt (Analog Loop-back)-On when ESC> entered on keyboard.*

ALt ..... 25 .. *See mode diagram & operator & on-line controls for additional detail tCertain KSRs either do not have this pin or do For Full-Duplex current-loop applications connect not perform the associated function 6 pins 3, 4, 5, & 8 together fNon-EIA For Half-Duplex current-loop additionally connect fOff > 450ms switches KSR from pins 14 & 15 together ( DATA to TERM READY mode Page 46 of 46 Issue 3 TTL-SERIAL INTERFACE The TTL (Transistor-to-Transistor Logic) interface is provided via a low power 74LS04 Schottky Hex. ,�) Inverter plus a 7417 Hex. Buffer having the electrical characteristics shown in the table on the next page.

Interface Pin Assignments TR (data Terminal Ready)- Off if KP in LOCAL mode, on if in TERM READY or DATA mode. Receipt of EOT or depression of TERM READY in TR DATA mode turns off TR for 50 ms. Also affected by paper supply & tests.* DR

DR (Data set Ready)- On puts KP in DATA mode if TR on. Off> 450 ms switches KP from DATA to TERM READY mode. DUP

DUP (Duplex)-Off if KP in half-duplex mode, on if in full-duplex; if supplierl --·ith +5VDC. RS c.. 6 ¥ RS (Request to Send) (late design KPs)-Grounded.

19 SEND (SD) (Send Data)-Off if KP in DATA 43 mode, then varies per sent data KP - 17 ·c: RECEIVE (RD) (Receive Data)-Must be off if ::J "' c: KP in DATA mode, until varied per received data. Q - "' u AL ·c: AL (Analog Loop-back) -On if ESC> entered on ::J E keyboard. DL E 0 u DL (Digital Loop-back)-On if ESC< entered on keyboard in LOCAL mode or received in DATA �)

+12VDC mode. 13 } -12VOC +12VDC (235 rna max) 11 -12VDC (110 rna max) all on if power on +5VDC + 5VDC ( 55 rna max) 7

GND GND (Ground)-Logic ground 9

*See mode diagram & operator & on-line

Pins 2, 4, 16 and 18 controls for additional detail. reserved for future use

Electrical Characteristics Physical

Electrical Characteristics The TTL interface connector is a 20-pin receptacle. TTL A mating 20-pin ribbon-cable plug connector is Interface From 43 To 43 available from: (Drivers)t (Terminators) t Teletype: part number 341802 0 to 0.4VDC 0 to 0.7VDC State 0 3M: catalog number 3428-1002 (Space) 8 rna max -0.36 rna max Berg: catalog number 65483-001 On @0.4VDC @0.4VDC Attached cable should be limited to 2 feet 2.4 to 5.25VDC 2 to 5.25VDC State 1 (Mark) l -0.4 rna max 0.020 rna max Off @5.25VDC @ 2.4VDC I '-- t �) Milximum capacitive load per driver= 50 pf T An open circuit to a terminator is considered a state 1 State 0-to-1 /1-to-0 propagation time = 20 ns