Sync (Port-Network Synchronization) - Avaya S8700 Maintenance Manual

For multi-connect configurations

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SYNC (Port-Network Synchronization)

MO's Name (in

This section discusses synchronization problems local to the switch. For further

information about synchronization including network synchronization, refer to

AT&T Network and Data Connectivity.

Synchronization maintenance is composed of both hardware and software

components, and its purpose is to provide a common reference frequency for

reliable digital communications between an S8700 Media Server system and

other PBXs, central offices (COs), or customer-premises equipment (CPE).

Synchronization is implemented using several system components including:

TN722, TN767, and TN464 DS1 Interfaces (all suffixes)

TN768, TN780, or TN2182 Tone-Clock

TN572 Switch Node Clock

TN573 Switch Node Interface

TN570 Expansion Interface

If both a primary and secondary references are administered for Stratum-4

synchronization, both references must reside in the same port network (PN).

Traditional Sync Operation

For a previous DEFINITY system, or optionally for an S8700 Media Server

Mulit-Connect system, synchronization is obtained from the public circuit-switched

network via either:

A DS1 or BRI interface

The ATM network

For DS1- or BRI-based synchronization, a particular DS1 or PRI interface is

configured as the synchronization reference. The IPSI/Tone-Clock board in the

same PN locks on to this reference and regenerates clock signals that are placed

on the EPN's backplane. In turn, the Center Stage Switch (CSS) components

transfer this timing to every other PN. These IPSI/Tone-Clocks then regenerate

clock signals for their own PNs at the same rate as the:

Public network

Initial SAT Command to

display errors

test synchronization

Full Name of MO

Port Network Synchronization

Issue 1 May 2002