MT8977 General Description
MT8977 Features
• D3/D4 or ESF framing and SLC-96 compatible
• Two frame elastic buffer with jitter tolerance improved to 156 UI
• 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 and STBUS
• One uncommitted scan point and drive point
• Pin compatible with MT8976 and MT8979
• ST-BUS compatible
MT8977 Typical Application
• DS1/ESF digital trunk interfaces
• Computer to PBX interfaces (DMI and CPI)
• High speed computer to computer data links
MT8977 Connection Diagram
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