Avaya 03-300430 User Manual

This section discusses intra-switch synchronization maintenance and the hardware and 
software components that provide a common reference frequency for reliable digital 
communications among the G3r system, the ATM switch, and other PBXs, Central Offices 
(COs) or customer-premises equipment (CPE).  Circuit packs involved in synchronization 
include:

Note:

TN768 or TN780 Tone-Clock circuit packs are not compatible with ATM EIs.

●

TN2312 IPSI circuit pack’s Tone-Clock circuit

●

TN2182 Tone-Clock

●

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

●

TN2305/6 ATM Expansion Interface (multimode fiber)

Synchronization is achieved between the S8700 Media Server Multi-Connect IPSI and the port 
networks (PNs) through the ATM port-network connectivity (ATM PNC) between the networks.  
Depending on the network’s synchronization plan and the status of synchronization sources, the 
system timing reference may be:

●

The clock circuit pack on the ATM switch

●

A DS1 or UDS1 interface circuit pack-tapped T1 input signal connected to the ATM switch 
clock circuit

●

An OC-3 interface circuit pack on the ATM switch

Stratum 4 synchronization extracts timing information directly from

●

A DS1 or UDS1 reference

●

An OC3 reference

●

The ATM switch clock

For further information about synchronization including network synchronization, refer to AT&T 
Network and Data Connectivity, 555-025-201.

ATM-SYNC

MIN

ATM Synchronization

ATM-SYNC

WRN

ATM Synchronization