Telephony Trainers Four Training Systems Are Available Covering Introductory Telephony Principles Through to Complex Digital Trunk Network Systems
SFC 7.3
Telecommunications
Telephony Trainers Four training systems are available covering introductory telephony principles through to complex Digital Trunk network systems. 58-001 is an introductory, stand-alone system covering Telephone & Interface and TDM/PCM Principles. 58-002 introduces Digital Switching tech- niques. 58-003 covers Digital Trunk Switching and message handling. 58-004 is a full Digital Trunk Networks trainer covering transit switching and signalling. Customers purchasing 58-002 can subse- quently expand their systems to cover the curriculum in 58-003 and 58-004 by the addition of more boards.Discovery All use the unique software to pro- vide computer based training systems and are complete with interfaces, cables and manuals, only requiring a PC.
Telephony Training System 58-001 The introductory system comprises: l l l Rapid Access Terminal (RAT) Telephone & Interface Board TDM/PCM Board Telephone & Interface TDM/PCM Principles Examines the signalling and speech circuits and the immediate interface Allows the study of the principles at the switching centre. The use of a high quality, commercial telephone TDM/PCM. It is based on the use of hybrid circuit in the subscribers line interface (SLIC) enables useful standard telephony devices but also measurements to be made. uses special circuits to demonstrate the effects of variable sampling rate, Curriculum Coverage bit rate and filtering. PAM is used to ●Telephone Signalling demonstrate the concept of taking ● Switch Hook short samples to represent a continu- ● Keypad ous waveform. TDM is demonstrated Ringing (Alerting) by multi-channel PAM. Telephone● Speech Curriculum Coverage ● Receiver ●Sampling ● Transmitter (Microphone) Basic Sampling Telephone hybrid circuit ● ● ● Aliassing error Interference Subscribers Line Interface Circuit Spectrum Analysis (SLIC) Telephone & Interface connected to RAT ● Multiplexing● (TDM) ● Battery Feed ● Multiplexing Introduction ● Overvoltage protection Time slots and Frames ● Ringing (Alerting) Pulse● Code Modulation● (PCM) Signalling ● Quantisation Quantisation noise Dual Tone Multi Frequency (DTMF) Interference signalling● Companding● ● Keypad Codes ● Linear Conversion ● Tone Duration ● Companding characteristic Speech Immunity ● Companded conversion Speech SLIC● Hybrid Forward loss Filtering● ● ● Aliassing error Filtered conversion Return balance loss Multichannel● PCM Testing● 24 and 30 Channel Systems Test-Out ● ● ● Frame Synchronisation Test-In Control
Visit the Feedback Website on www.fbk.com Telecommunications
Digital Switching System 58-002 System comprises: l Curriculum Coverage ● Controller l ●Local signalling ●Call records ● Outputs Digital Switching Centre ● Operation ● Call state Tasks board Tones and cadences ● Line identities Call● progress l ●Digital Switch Principles Call time ● Call set-up Four telephone handset Time switching Line records Call supervision kit ● ● ● Time and space switching ● Directory numbers Call release Covers Digital Switching tech- ●Digital switch Call accounting Manual● control niques and applications, includ- ● Control of time switch Line● maps Control ing time and space switching and Connection of tones ● Location maps Testing● Line scan Condition maps Test out & loop back the control of a digital switch by ● ● Switch hook State● transitions Traffic● connection memory. Introduces DTMF receivers Inputs System traffic Call State Transistion Diagrams conforming to ITU-T SDL format for call progress. Concepts of call state and state transition and the three stages of call handling. Supplied with a vertical mounting frame for ease-of-use and future upgrades.
Dual Switching System 58-003 System comprises: l Curriculum Coverage ● Controller l ●Trunk Configuration Zero insertion (bit stuffing) ●Error Control 2 - Digital Switching ● Trunk paths Trunk● Signal Units ● Sequence numbers Centre boards Local & inter-switching ● Message signal units Buffers l 2 - Four telephone hand- ● centre numbering Fill-in signal units Trunk● State Diagrams set kits Tones and cadences Signalling Information ● Originating switch ●Trunk Switching Field● ● Dialling In addition to the curriculum Outward path Label Destination switch covered by 58-002 extends the ● ● Return path ● Heading codes Trunk● Call Progress work to cover trunk switching and Signal Protocol Controller Address signals Originating switch trunk traffic topics. Covers local ● ● ● Flags ● Dialling & inter-switching centre numbers Frame check sequence Destination switch and their origin through trunk switching, highways and timeslots. CCITT (now ITU-T) codes and formats are used. Supplied with a vertical mounting frame for ease-of-use and future upgrades.
Trunk Networks System 58-004 System comprises: associated signalling and l the use of ITU-T type trans- l Controller 2 - Digital Switching action capability messages to control system testing. l Centre boards 2 - Four telephone hand- Supplied with a vertical mounting frame for l set kits ease-of-use. Trunk Networks board In addition to the curriculum Curriculum Coverage ● ● covered by 58-002 & 58-003 the Transit Switching Centre Destination Switch Signalling trunks network board has three ● ● ● Numbering Two-Level Transit 1st & 2nd Level Switches transit switches and extends the ● Transit Switch CSTD Switching● Non-Associated● Signalling work to cover transit switching Transit Signalling ● Numbering ● Signalling Call Progress and signalling. Transit Switch Call ● Dialling CSTD System Testing The system can be configured as ●Progress Routeing Tables ● TCAP Signalling four local switching centres, to ● Transit Switch Centre Two-Level Transit ● Originating Switch Call Progress ● Testing cover simple transit switching, Manual Testing two level transit switching, non- For further information on these and other equipment in the Feedback range please contact ...... Feedback Instruments Limited, Feedback Incorporated, Park Rd, Crowborough, E.Sussex, TN6 2QR, England. 437 Dimmocks Mill Road, PO Box 400, Hillsborough, NC 27278 Tel: +44 (0) 1892 653322, Fax: +44 (0) 1892 663719, Tel: 800-526-8783, 919-644-6466, Fax: 919-644-6470, E-mail: [email protected], Website: www.fbk.com E-mail: [email protected], Website: www.fbk.com
ã Feedback plc 0799