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Demand test descriptions and error codes - Avaya Support

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Figure 67: A Center Stage Switch Configuration<br />

switch<br />

node<br />

carrier<br />

PPN<br />

EI<br />

EPN<br />

EI<br />

Figure 68: SNC Functions<br />

1<br />

2<br />

3<br />

EPN<br />

EI<br />

4<br />

EPN<br />

EI<br />

5<br />

Switch Node Clock (SNC) TN572<br />

Switch Node Interface (SNI) TN573<br />

Expansion Interface (EI) TN570<br />

DS1 Converter (DS1C) TN574<br />

Online Switcher (OLS) power supply<br />

848 Maintenance Alarms for Communication Manager, Media Gateways <strong>and</strong> Servers<br />

EPN<br />

EI<br />

6<br />

EPN<br />

EI<br />

7<br />

EPN<br />

EI<br />

8<br />

EPN<br />

EI<br />

9<br />

10<br />

EPN<br />

EI<br />

11 12<br />

EPN<br />

EI<br />

13<br />

EPN<br />

EI<br />

14<br />

EPN<br />

EI<br />

15<br />

16<br />

EPN<br />

EI<br />

* = An EI or a DS1C circuit pack may reside in this slot<br />

** = A DS1C circuit pack may reside in this slot<br />

17<br />

EPN<br />

EI<br />

18<br />

EPN<br />

EI<br />

EPN<br />

EI<br />

S S S S S S S S S S S S S S S S S S<br />

OLS * N N N N N N N N N N N N N N N N N N * * OLS<br />

I I I I I I I I C C I I I I I I I I<br />

slot number<br />

.<br />

.<br />

.<br />

St<strong>and</strong>by SNC<br />

Active SNC<br />

Stratum 3<br />

Oscillator<br />

Phase<br />

Locked<br />

Loop<br />

Clock<br />

Generation<br />

Circuit<br />

SNI 1e02<br />

SNI 1e03<br />

SNI 1e20<br />

TPN<br />

Microcontroller<br />

Microcontroller<br />

.<br />

.<br />

.<br />

19<br />

20<br />

17<br />

TPN Links<br />

SNC-LINK<br />

(aux data 2)<br />

21<br />

16<br />

SNI (TN573)<br />

Reference Signals<br />

SNC-REF<br />

Serial Channel<br />

SNC-LINK<br />

(aux data 1)<br />

Clock Duplication<br />

Control<br />

SNC-BD<br />

9 Clock Busses<br />

SNC-BD<br />

fiber<br />

links

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