PM4341AT1XC
DATA SHEET
PMC-900602
ISSUE 7
T1 FRAMER/TRANSCEIVER
ESF, FMS1, FMS0:
The ESF bit selects either Extended Superframe format or enables the Frame
Mode Select bits (FMS) to select either regular superframe, T1DM or SLC®96
framing formats. The mode is encoded as follows:
Table 19
ESF
- XBAS Frame Format Options
FMS1
FMS0
MODE
0
0
0
0
0
1
SF framing format
T1DM framing format (R bit
unaffected)
0
0
1
1
0
1
SLC®96
T1DM framing format (FDL data
replaces R bit)
1
1
0
0
0
1
ESF framing format - 4 kbit/s data link
ESF framing format - 2 kbit/s data link
(frames 3,7,11,15,19,23)
1
1
1
0
1
ESF framing format - 2 kbit/s data link
(frames 1,5,9,13,17,21)
1
ESF framing format - 4 kbit/s data link
MTRK:
The MTRK bit forces trunk conditioning, idle code substitution and signalling
conditioning, on all channels when MTRK is a logic 1.This has the same
effect as setting the IDLC bit in the PCM Control byte and the SIG0 bit in the
SIGNALLING Control byte for all channels.
Reserved:
The Reserved bit should be set to logic 0 for proper operation.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
161
PMC [ PMC-SIERRA, INC ]
