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Demand test descriptions and error codes - Avaya Support

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Communication Manager Maintenance Object Repair Procedures<br />

Figure 3: Stratum-4 Synchronization with Unduplicated ATM PNC<br />

Note: The<br />

Interface<br />

module<br />

Note:<br />

TN722 DS1 Interface circuit pack does not provide a synchronization<br />

reference as reliably as the TN767 or TN464 circuit packs. Therefore, administer<br />

the TN767 or TN464 circuit packs as the primary or secondary sources.<br />

Stratum-3 Synchronization<br />

Stratum-3 synchronization is not supported on S8700-series servers with ATM PNC.<br />

Troubleshooting ATM synchronization<br />

A significant part of the Synchronization Recovery Strategy for a S8700-series system with ATM<br />

PNC resides in the ATM switch’s clock hardware, firmware, <strong>and</strong> software. The system monitors<br />

synchronization performance <strong>and</strong> alarms any faulty components. See SYNC (Port Network<br />

Synchronization).<br />

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

Clock<br />

ATM switch fabric<br />

Interface<br />

module<br />

ATM timing distribution<br />

ATM PNC<br />

External T1/E1<br />

primary<br />

External T1/E1<br />

secondary<br />

Interface<br />

module<br />

OC3 OC3<br />

ATM-EI<br />

DEFINITY<br />

DEFINITY<br />

ATM-EI<br />

EPN<br />

PPN<br />

Tone clock Tone clock<br />

DS1 DS1<br />

T1-splitter<br />

DS1 DS1<br />

T1-primary<br />

T1-secondary<br />

iodfst4 LJK 011998

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