PM5366-PI datasheet(189/267 Pages) PMC

189 / 267 page

PRELIMINARY

PM5366 TEMAP-84

DATASHEET

PMC-2010672

ISSUE 1

HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER

AND M13 MULTIPLEXER

PROPRIETARY AND CONFIDENTIAL

177

2,2

8,36,64

23,107,191

•••

1,28

34,62,90

100,184,268

2,28

34,62,90

101,185,269

3,28

34,62,90

102,186,270

Table 22

- E1/TVT2 Tributary Column Numbering

E1#

SPE1 Column SPE2 Column SPE3 Column

SBI Column

1,1

7,28,49,70

19,82,145,208

2,1

7,28,49,70

20,83,146,209

3,1

7,28,49,70

21,84,147,210

1,2

8,29,50,71

22,85,148,211

2,2

8,29,50,71

23,86,149,212

•••

1,21

27,48,69,90

79,142,205,268

2,21

27,48,69,90

80,143,206,269

3,21

27,48,69,90

81,144,207,270

SBI Timing Master Modes

The TEMAP-84 supports both synchronous and asynchronous SBI timing

modes. Synchronous modes apply only to T1 and E1 tributaries and are used

with ingress elastic stores to rate adapt the receive tributaries to the fixed SBI

data rate. Asynchronous modes allow T1, E1, DS3 and transparent tributaries to

float within the SBI structure to accommodate differences in timing.

In synchronous SBI mode, the T1 DS0s and E1 timeslots are in a fixed format

and do not move relative to the SBI structure. The SBI frame pulse, SAC1FP or

SDC1FP, in synchronous mode can be enabled to indicate CAS signaling multi-

frame alignment by pulsing once every 12

th 2KHz frame pulse period. SREFCLK

sets the ingress rate from the receive elastic store.

In Asynchronous modes, timing is communicated across the Scaleable

Bandwidth Interconnect by floating data structures within the SBI. Payload

indicator signals in the SBI control the position of the floating data structure and

therefore the timing. When sources are running faster than the SBI the floating

payload structure is advanced by an octet by passing an extra octet in the V3

octet locations (H3 octet for DS3 and E3 mappings). When the source is slower

than the SBI the floating payload is retarded by leaving the octet after the V3 or

H3 octet unused. Both these rate adjustments are indicated by the SBI control

signals.

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