WAN PHYSICALS
See also; Cisco console & aux cabling
Some Electrical Characteristics for T1 Cabling co-directional Mark 3.0 Vdc Space 0 Vdc +/- 0.30 Vdc Pulse width 647 nsec Encoding AMI (bipolar) or B8ZS Speed 1544 kbps +/- 50 ppm
Some Electrical Characteristics for E1 Cabling Coaxial or one symmetrical pair (4 wires) for each direction Balanced: 3.0 Vdc Mark Unbalanced: 2.37 Vdc Balanced: 0 Vdc +/- 0.237 Vdc Space Unbalanced: 0 Vdc +/- 0.3 Vdc Pulse width 488 nsec Encoding AMI or High Density Bipolar of order 3 (HDB3) Speed 2048 kbps +/- 50 ppm
X.21
D-type 15 pin connectors:
Pin 1 Protective Ground (Shield) Pins 2, 9 Transmit Pins 3, 10 Control Pins 4, 11 Receive Pins 5, 12 Indication Pins 6, 13 Signal Timing Pins 7, 14 Terminal Transmit Clock Pin 8 Signal Ground Pin 15 is not used. E1
DA15 D-type 15 pin connectors:
Pin 1 Transmit positive (TTIP) Pin 3 Receive positive (RTIP) Pin 9 Transmit negative (TRING) Pin 11 Receive negative (RRING) Pins 2, 4, 5-8, 10, and 12-15 are not used.
E1 RJ48
RJ48 cables :
Pin 1 Transmit negative (TRING) Pin 2 Transmit positive (TTIP) Pin 4 Receive negative (RRING) Pin 5 Receive positive (RTIP) Pins 3, 6, 7, and 8 are not used.
E1 BANTAM
BANTAM cables :
Tip positive Ring negative Sleeve ground RS-232 (V.24)
D-type 25 pin connectors:
Pin 1 Protective Ground (Shield) Pin 2 Transmit Data Pin 3 Receive Data Pin 4 Request To Send Pin 5 Clear To Send Pin 6 Data Set Ready Pin 7 Signal Ground Pin 8 Data Carrier Detect Pin 15 Transmit Clock (from DCE) Pin 17 Receive Clock Pin 18 Local Analog Loopback Pin 20 Data Terminal Ready Pin 21 Remote Digital Loopback Pin 22 Ring Indicator Pin 24 Transmit Clock (from DTE) Pin 25 Test Mode Pins 9-14, 16, 19 and 23 are not used. RS-530
D-type 25 pin connectors:
Pin 1 Protective Ground (Shield) Pins 2, 14 Transmit Data Pins 3, 16 Receive Data Pins 4, 19 Request To Send Pins 5, 13 Clear To Send Pins 6, 22 Data Set Ready Pin 7 Signal Ground Pins 8, 10 Data Carrier Detect Pins 9, 17 Receive Clock Pins 11, 24 Transmit Clock (from DTE) Pins 12, 15 Transmit Clock (from DCE) Pin 18 Local Analog Loopback Pins 20, 23 Data Terminal Ready Pin 21 Remote Digital Loopback Pin 25 Test Mode RS-449/RS-422
D-type 37 pin connectors:
Pin 1 Protective Ground (Shield) Pins 4, 22 Transmit Data Pins 5, 23 Transmit Clock (From DCE) Pins 6, 24 Receive Data Pins 7, 25 Request To Send Pins 8, 26 Receive Clock Pins 9, 27 Clear To Send Pin 10 Local Analog Loopback Pins 11, 29 Data Set Ready Pins 12, 30 Data Terminal Ready Pins 13, 31 Data Carrier Detect Pin 14 Remote Digital Loopback Pin 15 Ring Indicator Pins 17, 35 Transmit Clock (From DTE) Pin 18 Test Mode Pin 19, 37 Signal Ground Pins 2, 3, 16, 20, 21, 28, 32, 33, 34 and 36 are not used.
V.35
V.35 cables:
Pin A Protective Ground (Shield) Pin B Signal Ground Pin C Request To Send Pin D Clear To Send Pin E Data Set Ready Pin F Data Carrier Detect Pin H Data Terminal Ready Pin J Ring Indicator Pins P, S Transmit Data Pins R, T Receive Data Pins U, W Transmit Clock (from DTE) Pins V, X Receive Cloc Pins Y, AA Transmit Clock (from DCE) Pin N Remote Digital Loopback Pin L Local Analog Loopback Pin NN Test Mode T1
DA15 D-type 15 pin connectors:
Pin 1 Transmit positive (TTIP) Pin 3 Receive positive (RTIP) Pin 9 Transmit negative (TRING) Pin 11 Receive negative (RRING) Pins 2, 4, 5-8, 10, and 12-15 are not used.
T1 RJ48
RJ48 cables:
Pin 1 Transmit negative (TRING) Pin 2 Transmit positive (TTIP) Pin 4 Receive negative (RRING) Pin 5 Receive positive (RTIP) Pins 3, 6, 7, and 8 are not used.
T1 BANTAM
BANTAM cables:
Tip positive Ring negative Sleeve ground ISDN BRI
U port pinouts for the RJ-45.
8-Pin1 Function 3 No connection 4 Signal --- Tip or Ring 5 Signal --- Tip or Ring 6 No connection
1Pins 1, 2, 7, and 8 are not used.
The table below shows the BRI Cable (RJ-45 to RJ-45) pintouts.
NT7 LT1 Wire RJ-45 (8 Pin)8 RJ-45 (8 Pin) 4 Tip 4 5 Ring 5
1 LT refers to the line termination point (that is, at the wall jack).
ISDN BRI Cable Specifications
The table below provides the cable specifications of the ISDN BRI cable.
High-capacity Low-capacity Specification Cable Cable Resistance (at 96 160 ohms/km 160 ohms/km kHz) Capacity (at 1 120 nF1/km 30 nF/km kHz) Impedance (96 75 ohms 150 ohms kHz) 0.024" (0.6 0.024" (0.6 Wire diameter mm) mm) Distance 32.8' (10 m) 32.8' (10 m) limitation
1 nF = nanoFarad. ISDN S/T Interface for a downstream ISDN phone or fax
The ISDN S/T interface requires an RJ-45 straight-through cable.
Note: You cannot connect the 1604-R to the ISDN network through the S/T port.
The table below provides the ISDN BRI S/T port pinouts for the RJ-45.
8 Pin1 TE2 NT3 Polarity 3 Transmit Receive + 4 Receive Transmit + 5 Receive Transmit - 6 Transmit Receive -
1Pins 1, 2, 7, and 8 are not used.
2TE refers to terminal equipment Layer 1 aspects of TE1, TA, and NT functional groups. This applies to the Cisco 1603 and the ISDN BRI S/T WAN interface card.
3NT refers to network terminating Layer 1 aspects of NT1 and NT2 functional groups. This applies to the Cisco 1604 ISDN S/T port.
G.703
Some Electrical Characteristics Mark 1.0 Vdc Space 0 Vdc +/- 0.10 Vdc Pulse width 3.9 usec
The bit coding is done in three steps. Step1: A binary 1 is replaced by 1100 and a binary 0 by 1010. Step2: Conversion into a three-level signal (AMI) by alternating the polarity of consecutive blocks. Step3: Conversion to Violated AMI. Every 8th block of the polarity is alternated. The violated block marks the last bit in an octet.
Central-Directional This is a rarely used version. The clock signals are supplied on different wires from a centralized clock. The centralized could be an atomic-clock. The reason for 8 or 6 wire version is the possibility to send a clock signal balanced in both directions at the same time, or in each direction separate. The first has 6-wires (2 clock, 4 data), the second is 8-wire (4 clock, 4 data). Some Electrical Characteristics Mark 1.0 Vdc Space 0 Vdc +/- 0.10 Vdc Pulse width 15.6 usec
The modulation technique used is AMI.
Contra-Directional This is always an 8-wire version. There is ofcourse the transmit and receive pair and two pairs for the clock signals. All clock signals are send to the DTE. This means they are all originated by the DCE.
Some Electrical Characteristics Mark 1.0 Vdc Space 0 Vdc +/- 0.10 Vdc Pulse width 15.6 usec
The modulation technique used is AMI.
Speeds higher than 64kbps All other speeds use a different coding scheme and different pulse width, also the mark and space voltages may differ.
Pinning Specifications
Signal RJ45 Description DTE RJ45 BNC Description DTE BNC RxA Receive Input Negative 1 Receive Input Tip RxB Receive Input Positive 2 Receive Ground Ring TxA Transmit Output Negative 4 Transmit Output Tip TxB Transmit Output Positive 5 Transmit Ground Ring S1 Transmit Ground 3 S2 Receive Ground 6