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CO-DS1 (DS1 CO Trunk)
Issue 1 June 2005 817
CO-DS1 (DS1 CO Trunk)
S8700 | 8710 / S8500 / S8300
Many trunk problems are caused by incorrect settings of parameters on the trunk group
administration screen. Settings must be compatible with the local environment and with
parameter settings on the far end. Refer to “Chapter 12, Managing Trunks", in the Administrator
Guide for Avaya Communication Manager, 03-300509 for information on how to administer
trunks. The Application Notes section of that book shows the correct settings for administrable
timers and other parameters on a country-by-country basis.
A DS1 CO (central office) trunk provides a link for digitized voice or data communications
between the system and a central office switch. There are two types of DS1 interfaces:
● 24 DS0 channels on a 1.544-Mbps link
● 31 DS0 channels + 1 framing channel on a 2.048-Mbps link
32-channel mode is supported on the TN464C or higher suffix, TN2207, and TN2464
circuit packs (
S8300/G700: and on MM710 Media Modules).
The DS1-CO MO monitors and maintains a CO trunk port on a TN767 DS1 Interface circuit
pack, a TN464 UDS1 Interface circuit pack, or on
S8300 / G700: MM710 Media Module.
Throughout this discussion, the term DS1 applies to all. For more information, see one of the
following maintenance objects:
The DS1 circuit pack or media module supports low level CO trunk signaling interfaces for both
ground-start and loop-start trunks. This maintenance strategy covers the in-line errors log,
initialization tests, periodic tests, scheduled tests, demand tests, and alarm resolution.
MO Name in Alarm Log Alarm
Level
Initial Command to Run Full Name of MO
CO-DS1 MAJ
1
1. A Major alarm on a trunk indicates that alarms on these trunks are not downgraded by set options
and that at least 75 percent of the trunks in this trunk group are alarmed. For more information about
set options, see Maintenance Commands Reference (03-300191).
test trunk grp#/mem# l DS1 CO Trunk
CO-DS1 MIN test trunk grp#/mem# l DS1 CO Trunk
CO-DS1 WRN test trunk grp#/mem# DS1 CO Trunk
Circuit Pack/Media Module Maintenance Object
TN767 DS1 Interface Circuit Pack DS1-BD
TN464 UDS1 Interface Circuit Pack UDS1-BD
S8300 / G700: MM710 DS1 Media Module MG-DS1