PM5366-PI datasheet(123/267 Pages) PMC

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PRELIMINARY

PM5366 TEMAP-84

DATASHEET

PMC-2010672

ISSUE 1

HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER

AND M13 MULTIPLEXER

PROPRIETARY AND CONFIDENTIAL

111

Table 8

- DS3 synchronizer bit stuffing algorithm.

Row Number

Normal or DS3 AIS

Run Faster

Run Slower

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].

9.33 Extract Scaleable Bandwidth Interconnect (EXSBI)

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

PM5366-PI Datasheet(PDF) 123 Page - PMC-Sierra, Inc