DESCRIPTION

The IDT82P2808 is a 8+1 channels high-density T1/E1/J1 short haul Line Interface Unit. Each channel of the IDT82P2808 can be independently configured. The configuration is performed through a Serial or Parallel Intel/Motorola Non-Multiplexed /Multiplexed microprocessor interface.

FEATURES

◆ Integrates 8+1 channels T1/E1/J1 short haul line interface units

for 100 Ω T1, 120 Ω E1, 110 Ω J1 twisted pair cable and 75 Ω

E1 coaxial cable applications

◆ Per-channel configurable Line Interface options

• Supports various line interface options

– Differential and Single Ended line interfaces

– true Single Ended termination on primary and secondary side of trans

former for E1 75 Ω coaxial cable applications

– transformer-less for Differential interfaces

• Fully integrated and software selectable receive and transmit

termination

– Option 1: Fully Internal Impedance Matching with integrated receive

termination resistor

– Option 2: Partially Internal Impedance Matching with common external

resistor for improved device power dissipation

– Option 3: External impedance Matching termination

• Supports global configuration and per-channel configuration to

T1, E1 or J1 mode

◆ Per-channel programmable features

• Provides T1/E1/J1 short haul waveform templates and user

programmable arbitrary waveform templates

• Provides two JAs (Jitter Attenuator) for each channel of receiver

and transmitter

• Supports AMI/B8ZS (for T1/J1) and AMI/HDB3 (for E1) encoding

and decoding

◆ Per-channel System Interface options

• Supports Single Rail, Dual Rail with clock or without clock and

sliced system interface

• Integrated Clock Recovery for the transmit interface to recover

transmit clock from system transmit data

◆ Per-channel system and diagnostic functions

• Provides transmit driver over-current detection and protection

with optional automatic high impedance of transmit interface

• Detects and generates PRBS (Pseudo Random Bit Sequence),

ARB (Arbitrary Pattern) and IB (Inband Loopback) in either

receive or transmit direction

• Provides defect and alarm detection in both receive and transmit

directions.

– Defects include BPV (Bipolar Violation) /CV (Code Violation) and EXZ

(Excessive Zeroes)

– Alarms include LLOS (Line LOS), SLOS (System LOS), TLOS

(Transmit LOS) and AIS (Alarm Indication Signal)

• Programmable LLOS detection /clear levels. Compliant with ITU

and ANSI specifications

• Various pattern, defect and alarm reporting options

– Serial hardware LLOS reporting (LLOS, LLOS0) for all 9 channels

– Configurable per-channel hardware reporting with RMF/TMF

(Receive /Transmit Multiplex Function)

– Register access to individual registers or 16-bit error counters (Continue ...)

APPLICATIONS

◆ SDH/SONET multiplexers

◆ Central office or PBX (Private Branch Exchange)

◆ Digital access cross connects

◆ Remote wireless modules

◆ Microwave transmission systems