Description

The MT8976 is Mitel’s second generation T1 interface solution. The MT8976 meets the Extended Super Frame format (ESF), the current D3/D4 format and is compatible with SLC-96 systems.

The MT8976 interfaces to DS1 1.544 Mbit/sec digital trunk.

Features

• D3/D4 or ESF framing and SLC-96 compatible

• 2 frame elastic buffer with 32 µsec jitter buffer

• Insertion and detection of A, B,C,D bits. Signalling freeze, optional debounce

• Selectable B8ZS, jammed bit (ZCS) or no zero code suppression

• Yellow alarm and blue alarm signal capabilities

• Bipolar violation count, FT error count, CRC error count

• Selectable robbed bit signalling

• Frame and superframe sync. signals, Tx and Rx

• AMI encoding and decoding

• Per channel, overall, and remote loop around

• Digital phase detector between T1 line & STBUS

• One uncommitted scan point and drive point

• Pin compatible with MT8977 and MT8979

• ST-BUS compatible

Applications

• DS1/ESF digital trunk interfaces

• Computer to PBX interfaces (DMI and CPI)

• High speed computer to computer data links