® ST-BUS™ FAMILY MH89790B CEPT PCM 30/CRC-4 Framer & Interface Preliminary Information Features • • • • • • • • • • • • • • • Complete primary rate 2048 kbit/s CEPT transceiver with CRC-4 option Selectable HDB3 or AMI line code Two frame elastic buffer with 32µ s jitter buffer Tx and Rx frame and multiframe synchroniza-tion signals Frame alignment and CRC error counters Insertion and detection of A, B, C, D signalling bits with optional debounce Line driver and receiver Per channel, overall, and remote loop around Digital phase detector between E1 line and ST-BUS ST-BUS compatible Pin compatible with the MH89790 Inductorless clock recovery Loss of Signal (LOS) indication Available in stand...

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