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PM5366-PI Datasheet(PDF) 201 Page - PMC-Sierra, Inc

Part # PM5366-PI
Description  HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
PDF  267 Pages
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Manufacturer  PMC [PMC-Sierra, Inc]
Direct Link  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM5366-PI Datasheet(HTML) 201 Page - PMC-Sierra, Inc

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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
189
Table 34
- E3 Framing Format
SPE
COL #
E3
1
E3
2-18
E3
19
E3
20-38
E3
39
E3
40-84
E3
85
ROW
SBI COL#
1,4,7,10
13
16
•••
•••
•••
•••
70
•••
•••
•••
•••
130
•••
•••
•••
•••
268
1
Unused
H1
V5
E3
E3
E3
E3
E3
E3
2
Unused
H2
E3
E3
E3
E3
E3
E3
E3
3
Unused
H3
E3
E3
E3
E3
E3
E3
E3
4
Unused Linkrate
E3
E3
V5
E3
E3
E3
E3
5
Unused
Unused
E3
E3
E3
E3
E3
E3
E3
6
Unused
Unused
E3
E3
E3
E3
E3
E3
E3
7
Unused
Unused
E3
E3
E3
E3
V5
E3
E3
8
Unused
Unused
E3
E3
E3
E3
E3
E3
E3
9
Unused
Unused
E3
E3
E3
E3
E3
E3
E3
Because the E3 tributary rate is less than the rate of the gray region, padding
octets are interleaved with the E3 tributary to make up the difference in rate.
Interleaved with every E3 frame is an alternating pattern of 81 and 82 stuff
octets, one of which is the V5 octet. These 81 or 82 stuff octets are spread
evenly across the E3 frame. Each E3 subframe is 48 octet which is further
broken into 4 equal blocks of 12 octets each. Table 35 shows the alternating E3
frame stuffing format that is packed into the gray region of Table 34. Note that
there are 6 stuff octets after the V5 octet in one frame and 5 stuff octets after the
V5 octet in the next frame. In this table V5 indicates the V5 octet which is also a
stuff octet, R indicates a stuff octet, D indicates an E3 data octet, FAS indicates
the first byte of the 10 bit E3 Frame Alignment Signal.



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