Filter
Top Products
ATM-BCH (ATM B-Channel Trunk)
Issue 1 June 2005 507
ATM-BCH (ATM B-Channel Trunk)
S8700 | 8710 / S8500
ATM-BCH explains how to test and repair TN230x ATM Interface circuit packs (TN2305 and
TN2306) that have ATM B-channel trunks administered for ATM Circuit Emulation Service
(CES).
For additional repair information, see also ATM-DCH (ATM D-Channel Port)
on page 522,
ATM-SGRP (ATM Signaling Group)
on page 598 and PKT-BUS (Packet Bus) on page 1790.
For maintenance instructions for TN230x circuit packs that are administered as Expansion
Interfaces for ATM network connectivity, see ATM-INTF (TN2305/6)
on page 573.
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 channel and B channels of that circuit. B channels must also be assigned to
ISDN-PRI trunk groups. TN230x circuit packs support up to 248 ports per circuit pack.
Signaling Group Components
B (bearer) channels (ATM-BCH) transmit digitized voice or data, while a separate D channel
(ATM-DCH) handles call-control signaling. One D channel handles signaling for a group of B
channels that combine to form a signaling group (ATM-SGRP).
MO Name in
Alarm Log
Alarm
Level
Initial Command to Run Full Name of MO
ATM-BCH MAJ
1
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.
test port location l ATM B-Channel Trunk
ATM-BCH MIN test port location l ATM B-Channel Trunk
ATM-BCH WRN test port location sh ATM B-Channel Trunk