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