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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

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.

9.2 The 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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