PM5366-PI datasheet(161/267 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

149

OPERATION

12.1 Tributary Indexing

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:

• SPE #1, TUG-3 #1 and DS3 #1

• SPE #2, TUG-3 #2 and DS3 #2

• SPE #3, TUG-3 #3 and DS3 #3

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 #

= 7*(TU11-1) + TUG2

= 4*(DS2-1)+DS1

2.048Mbit/s SBI LINK #

= 7*(TU12-1) + TUG2

= 3*(DS2-1)+E1

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