PEB2035

Serial Interface to Line Interface Unit
`Frame alignment/synthesis for 2048 kbit/s (CEPT,PCM 30) and 1544 kbit/s (T1, PCM 24)
`Meets newest CCITT Rec's (Blue Book), FTZ Rec's and AT&T technical advisories (DMI, August 1986)
`Programmable formats for PCM 30: Doubleframe, CRC Multiframe PCM 24: 4-Frame Multiframe (F4), 12-Frame Multiframe (F12, D3/4), Extended Superframe (ESF), Remote Switch Mode (F72)
`Selectable conditions for loss of sync
`Selectable line codes (HDB3, B8ZS, AMI with ZCS)
`Unipolar NRZ for interfacing fibre optical transmission routes
`Error checking via CRC4 or CRC6 procedures
`Insertion and extraction of alarms and facility signaling
`IDLE code insertion for selectable channels
Serial Interface to System Internal Highway
`System clock frequency of either 4096 kHz or 8192 kHz
`Selectable 2048/4096 kbit/s system internal highway with programmable receive/transmit shifts
`Two-frame deep elastic receive memory for receive route clock wander and jitter compensation (can be reduced to one-frame length for PCM 30 master-slave applications)
`One frame elastic transmit memory (PCM 24 mode only) for transmit route clock wander and jitter compensation
`Two different time-slot assignment procedures in PCM 24 mode
`Support for different signaling schemes
`Channel loop back capabilities
`Channel parity error monitoring
`Clear channel capabilities in PCM 24 mode