Avaya 03-300430 User Manual

ATM-TRK explains how you test and repair TN230x ATM Interface circuit packs (TN2305 and 
TN2306) that have been administered as virtual ISDN-PRI trunks for ATM Circuit Emulation 
Service (CES).  The maintenance instructions for TN230x circuit packs that have been 
administered as Expansion Interfaces for WAN connectivity are in the ATM-INTF (TN2305/6) 
MO.

The TN2305 and TN2306 (

on page 617) are 

dual-purpose ATM circuit packs that can be administered as either:

●

 or virtual ISDN-PRI signaling trunks

●

Expansion Interfaces (ATM-EIs) for port-network connectivity (ATM PNC) between the 
PNs

Either circuit pack “personality” requires SONET OC-3 or SDH STM-1 fiber cable connections 
between the circuit pack and the ATM switch.  As a trunk board, it supports direct connection 
between ATM CES circuit packs without an intervening ATM switch.

ATM-TRK

MAJ

test board location ATM TRUNK (ATM Circuit 

Emulation Service)

ATM-TRK

MIN

ATM TRUNK (ATM Circuit 

Emulation Service)

ATM-TRK

WRN

ATM TRUNK (ATM Circuit 

Emulation Service)

TN2305

B and D 

channels

24 or 32 

channel

Multimode

Y

TN2306

B and D 

channels

24 or 32 

channel

Single-mode

Y