Demand test descriptions and error codes - Avaya Support

ATM-BCH (ATM B-Chel Trunk)
ATM-BCH (ATM B-Chel Trunk)
MO Name in Log Alarm Level Initial Command to Run Full Name of MO
ATM-BCH MAJ1 MIN
ATM-BCH explains how to test and repair TN230x ATM Interface circuit packs (TN2305 and
TN2306) that have ATM B-Chel trunks administered for ATM Circuit Emulation Service (CES).
For additional repair information, see also, ATM-SGRP (ATM Signaling Group) and PKT-BUS
(Packet Bus).
For maintenance instructions for TN230x circuit packs that are administered as Expansion
Interfaces for ATM network connectivity, see ATM-INTF (ATM Interface).
ATM Circuit Emulation Service
Under ATM Circuit Emulation Service, you simulate ISDN-PRI circuits by assigning ATM ports
to signaling groups. Each signaling group represents a PRI circuit, and the ports in the group
represent the D-Chel and B-Chels of that circuit. B-Chels must also be assigned to ISDN-PRI
trunk groups. TN230x circuit packs support up to 248 ports per circuit pack.
Signaling Group Components
test port location l ATM B-Chel Trunk
WRN test port location
1. A MAJOR alarm on a trunk means that alarms on these trunks are not downgraded by set options, and at
least 75% of the trunks in this trunk group are alarmed.
B (bearer) chels (ATM-BCH) transmit digitized voice or data, while a separate D-chel
(ATM-DCH) handles call-control signaling. One D-chel handles signaling for a group of B-Chels
that combine to form a signaling group (ATM-SGRP).
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