E1 PRI Frame Format

Time Slot 0

Time Slot 1

Time Slot 31

256 BITS (125 microseconds)

• Supports 30B, 1 D and 1 framing channel

• Each B channel time slot has a PCM 8 bit sample

• Does not support 31B channels (NFAS)

• Uses HDB3 line coding scheme

• Frame rate is 8000 frames per second

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