PM5366-PI PMC-Sierra, Inc., PM5366-PI Datasheet - Page 123

• Manufacturer Part Number: PM5366-PI
• Description: HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
• Manufacturer: PMC-Sierra, Inc.

PRELIMINARY
DATASHEET
PMC-2010672
9.33 Extract Scaleable Bandwidth Interconnect (EXSBI)
PROPRIETARY AND CONFIDENTIAL
Table 8
Under microprocessor control, the incoming DS3 stream can be overwritten with
the framed DS3 AIS. When asserting DS3 AIS, a nominal stuff pattern is used
as illustrated above. Please refer to the D3MD functional description section for
a description of the DS3 AIS frame.
The D3MA outputs the STS-1 (STM-0/AU3) with the mapped DS3 onto the Line
Add bus, LADATA[7:0].
The Extract Scaleable Bandwidth Interconnect block demaps up to 84
1.544 Mbit/s links, 63 2.048 Mbit/s links, three 44.736 Mbit/s links, three
34.386 Mbit/s links or an arbitary bit rate from the SBI shared bus. The SBI
bandwidth is evenly divided into three SPEs, each of which may carry a different
payload type. The 1.544 Mbit/s links can be unframed or they can be T1 framed
and channelized for insertion into the DS3 multiplex or SONET/SDH mapping.
The 2.048 Mbit/s links can be unframed or they can be E1 framed and
channelized for insertion into the SONET/SDH mapping or G.747 multiplexer.
The 44.736 Mbit/s links can also be unframed for mapping into SONET/SDH.
The 44.736 Mbit/s links and 34.368 Mbit/s links can be DS3/E3 unchannelized
when the TEMAP-84 is used as a DS3/E3 framer. Finally, an arbitrary bandwidth
signal may be carried for presentation on the Flexible Bandwidth Port. The SBI
Bus Data Formats section provides the details of the mapping formats.
All egress links extracted from the SBI bus can be timed from the source or from
the TEMAP-84. When timing is from the source, the 1.544 Mbit/s, 2.048 Mbit/s,
34.368 Mbit/s or 44.736 Mbit/s internal clocks are slaved to the arrival rate of the
Row Number
1
2
3
4
5
6
7
8
9
- DS3 synchronizer bit stuffing algorithm.
Normal or DS3 AIS
ISSUE 1
S
S
S
S
S
S
I
I
I
111
Run Faster
S
S
S
S
I
I
I
I
I
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER
Run Slower
AND M13 MULTIPLEXER
PM5366 TEMAP-84
S
S
S
S
S
S
S
S
I