PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
Figure 4
- STM-4 (STS-12) Order of Byte Transmission
(STS-3 #, STS-1 #)
STM-1 #, STM-0/AU3 #
1,1
1,2
1,3
2,1
2,2
2,3
3,1
3,2
3,3
4,1
4,2
4,3
STM-1
(STS-3)
Tributary
Processor
(STP)
#1
STM-1
(STS-3)
Tributary
Processor
(STP)
Order of Transmission
Twelveth
Byte
First
Byte
#2
4,3 3,3 2,3 1,3 4,2 3,2 2,2 1,2 4,1 3,1 2,1 1,1
STM-1
(STS-3)
Tributary
Processor
(STP)
STM-4 (STS-12)
#3
STM-1
(STS-3)
Tributary
Processor
(STP)
Byte Interleaving to generate STM-4 (STS-12) stream
#4
10.1 Input Bus Demultiplexer
In STM-4 (STS-12) interface mode, the first stage of the input bus demultiplexer
captures data sampled on the ID[7:0] bus and distributes this data as four STM-1
(STS-3) streams to the corresponding four STM-1 (STS-3) tributary processors
(STP). In STM-1 (STS-3) interface mode, the first stage of the input bus
demultiplexer is bypassed and the STM-1 (STS-3) data on the ID[7:0], ID[15:8],
ID[23:16] and ID[31:24] is forwarded to the respective STP’s. The input STM-1
(STS-3) demultiplexing logic of each STP provides the second stage of the input
bus demultiplexer. It distributes the STS-1 (AU3) or TUG3 data to the three
tributary payload processors within the STP.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
89
PMC [ PMC-SIERRA, INC ]
