STANDARD PRODUCT
PM4351 COMET
DATA SHEET
PMC-1970624
ISSUE 10
COMBINED E1/T1 TRANSCEIVER
alignment is lost. However, once CRC multiframe alignment is found, it cannot
be lost due to errors in the 6-bit MFAS pattern.
Under the CRC-to-non-CRC interworking algorithm, if the E1-FRMR can achieve
basic frame alignment with respect to the incoming PCM data stream, but is
unable to achieve CRC-4 multiframe alignment within the subsequent 400 ms,
the distant end is assumed is assumed to be a non CRC-4 interface. The details
of this algorithm are illustrated in the state diagram in Figure 8.
PROPRIETARY AND CONFIDENTIAL
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