PCM SWITCHING AND TRANSMISSION SYSTEM

PCM SWITCHING AND TRANSMISSION SYSTEM


Specifications

 

Telephone sets: PULSE/TONE dialing

• Operating modes:

- Local: TDM E1-32 frame generation, PCM channels and digital exchange switching

- Local line: TDM E1-32 frame generation, PCM channels,

 on line 4 transmission with HDB3 coding, Loop with Line Simulator and digital exchange switching

- Testing line: like Local line with assessment of service quality

- Remote Loop: like Local line with external Loop

- Remote Master/Slave: a bidirectional link can be established to connect 2 Trainers mod. PCM/EV

• Loop modes:

- Internal: with Line Simulator

- External: with output and input on coaxial line

• 4 User interfaces (SLIC) for the connection of 4 Users for

• POTS or PSTN networks:

- Compatibility: telephone, modem, fax

- Dialing: pulses, multi-frequency tones (DTMF)

• 4 CODECs with functions of:

- Filter

- Signal conversion: analog/digital PCM

- Time-Slot assignment: transmission and reception

- Serial frame generation: 32 channels (2048 kb/s)

• 1 Digital Switch that “routes” the PCM signals for the required links

• 1 CEPT Interface with functions of:

- HDB3 coder-transmitter

- HDB3 receiver-decoder

• 1 Line Interface with functions of:

- Line equalizer

- Reception clock regenerator

• 1 Simulator of artificial line:

- Controls of Attenuation and Noise generator

• 1 Control microprocessor able to interface with a PC

• 1 Synchronization system for displaying

• Time Slots on oscilloscope

• State indication LED:

- Signaling: Clock Loss, BER, Frame Sync, Multi-Frame Sync
- Incoming calls: for Users1, 2, 3 and 4
- Switch Hook detection: for Users 1, 2, 3 and 4
- DTMF binary code and Line signaling: for User1