PM5366-PI PMC-Sierra, Inc., PM5366-PI Datasheet - Page 74
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PM5366-PI
Manufacturer Part Number
PM5366-PI
Description
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM5366-PI.pdf
(267 pages)
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9.2 The Tributary Indexing
PROPRIETARY AND CONFIDENTIAL
corresponding rate justifications at the SBI Drop Bus as indicated by the SDPL
signal. Regardless of the IVTPPBYP bit state, the SDV5 output will always
indicate the V5 byte location.
The TEMUX-84 is capable of transporting 84 1.544 Mbit/s (T1) or 63 2.048
Mbit/s (E1) tributaries. This section explains the correspondence between the
indexing systems of the various mapping and multiplexing formats: SBI Bus,
Telecom Bus and M13. The listed index systems are used throughout the
document.
The SBI Bus tributary designation uses two integers: the first represents the byte
interleaved SPE number (range 1 to 3) and the second is the link index within the
SPE (range 1 to 28).
The Telecom Bus indexing follows the conventions of the ITU-T multiplexing
structure. The bandwidth is divided into three TUG-3s numbered 1 through 3,
each of which is composed of seven TUG-2s numbered 1 through 7, each of
which is composed of either three TU-12s numbered 1 through 3 or four TU-11s
numbered 1 through 4.
The three DS3s are divided into seven DS2s, each of which is composed of
either four 1.544 Mbit/s or three 2.048 Mbit/s tributaries.
The payload capacity is divided into three equal portions. Each of the following
lists represents one set of equivalent tributaries:
Table 13 and Table 14 provide the equivalencies between the various multiplex
and mapping formats. Alternately, the formats can be equated with the following
formulae:
1.544Mbit/s SBI LINK #
2.048Mbit/s SBI LINK #
• SPE #1, TUG-3 #1 and DS3 #1
• SPE #2, TUG-3 #2 and DS3 #2
• SPE #3, TUG-3 #3 and DS3 #3
ISSUE 1
= 7*(TU11-1) + TUG2
= 4*(DS2-1)+DS1
= 7*(TU12-1) + TUG2
= 3*(DS2-1)+E1
62
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER
AND M13 MULTIPLEXER
PM5366 TEMAP-84
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