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Communication Manager Maintenance-Object Repair Procedures
1446 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
ISDN-TRK (DS1 ISDN Trunk)
S8700 | 8710 / S8500 / S8300
Note:
Note: 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. See Administrator Guide
for Avaya Communication Manager, 03-300509. The Application Notes section of
that book shows the correct settings for administrable timers and other
parameters on a country-by-country basis.
Note:
Note: See the figures in the ISDN-SGR (ISDN-PRI Signaling Group) on page 1429
maintenance object for an illustration of the principles described below.
Throughout this section, the general term DS1 circuit pack refers to TN464 and
TN767 series circuit packs for systems supporting circuit packs (S8700, S8500),
and to MM710 DS1 Media Modules for systems supporting media modules
(S8300, G700, G350).
For additional repair information, see also DS1-BD (DS1 Interface Circuit Pack)
on page 978 for
TN767 ports, UDS1-BD (UDS1 Interface Circuit Pack)
on page 2374 for TN464C or higher
suffix ports, and MG-DS1 (DS1 Interface Media Module)
on page 1594 for MM710 Media
Module ports.
A DS1 ISDN trunk is a 64-kbps bearer channel used to transmit digitized voice or data traffic.
These trunks, or B channels, use a separate channel, the D channel for call-control signaling.
This mode of operation is known as out-of-band signaling, as opposed to in-band robbed-bit
signaling, in which signaling is carried in the same channel as the voice or data traffic. One D
channel, or ISDN signaling link (ISDN-LNK), carries signaling messages for several B channels,
forming an ISDN signaling group (ISDN-SGR).
A B channel may be a port on a TN464 series UDS1 circuit pack, a TN767 series DS1 Interface
circuit pack, or an MM710 DS1 Interface Media Module.
MO Name in
Alarm Log
Alarm
Level
Initial SAT Command to
Run
Full Name of
MO
ISDN-TRK MAJ
1
1. A MAJOR alarm on a trunk indicates that alarms on these trunks are not
downgraded by the set options.
test port location l DS1 ISDN Trunk
ISDN-TRK MIN test port location l DS1 ISDN Trunk
ISDN-TRK WRN test port location s DS1 ISDN Trunk