SBI Bus Serializer ASSP Telecom Standard Product Data Sheet
Released
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000168, Issue 5
321
Transport
Overhead
VC-4 Path
Overhead
Fixed
Stuff
TU-11
#1
TU-11
#2 - #336
TU-11
#1
TU-11
#2 - #336
TU-11
#1
TU-11
#2 - #336
1
0 – 35
36 – 39
40 –
71
72
73 –
407
408
409 –
743
744
745 -
1079
2
1080 –
1115
1116 –
1119
1120 –
1151
1152
1153 –
1487
1488
1489 –
1823
1824
1825 –
2159
3
2160 –
2195
2196 –
2199
…
4
3240 –
3275
3276 –
3279
…
5
4320 –
4355
4356 –
4359
…
6
5400 –
5435
5436 –
5439
…
7
6480 –
6515
6516 –
6519
…
8
7560 –
7595
7596 –
7599
…
9
8640 –
8675
8676 –
8679
8680 –
8711
8712
8713 –
9047
9048
9049 –
9383
9384
9385 –
9719
13.10 Using the PRBS Generator and Monitors (WPP and PPP)
A pseudo-random (using the X
23
+X
18
+1 polynomial) or incrementing pattern can be
inserted/extracted in the SONET/SDH payload. With PRBS data and incrementing data
patterns, the payload envelope is filled with pseudo-random/incrementing bytes with the
exception of POH and fixed stuff columns. In the case of the incrementing counts, the count
starts at 0 and increments to FFh before the count starts over at 0 once again. The incrementing
count is free to float within the payload envelope and therefore the 0 count is not associated
with any fixed location within a payload envelope. This PRBS generator and monitor is
compatible with the PRBS generators and monitors in other CHESS Set devices. It may not
be compatible with external test equipment.
13.10.1
Mixed Payload (STS-12c/STM-4/AU4-4c, STS-3c/STM-1, and STS-1/STM-0)
The WPP and PPP are designed to process the payload of an STS-12/STM-4 frame in a time-
multiplexed manner. Each time division (12 STS-1/STM-0 paths) can be programmed to a
granularity of an STS-1/STM-0. It is possible to process one STS-12c/STM-4c, twelve STS-
1/STM-0 or four STS-3c/STM-1 or a mix of STS-1/STM-0 and STS-3c/STM-1 as long as the
aggregate data rate is not more than one STS-12/STM-4 equivalent. The mixed payload
configuration can support the three STS-1/STM-0 and STS-3c/STM-1 combinations shown
below:
three STS-1/STM-0 with three STS-3c/STM-1
six STS-1/STM-0 with two STS-3c/STM-1
nine STS-1/STM-0 with one STS-3c/STM-1
The STS-1/STM-0 path that each one of the payload occupies, cannot be chosen randomly.
They must be placed on STS-3c/STM-1 boundaries (group of three STS-1/STM-0).