Demand test descriptions and error codes - Avaya Support

ISDN-TRK (DS1 ISDN Trunk)
Note: Many
ISDN-TRK (DS1 ISDN Trunk)
MO Name in Log Alarm Level Initial Command to Run Full Name of
MO
ISDN-TRK MAJ1 MIN
test port location long DS1 ISDN Trunk
WRN test port location
1. A MAJOR alarm on a trunk indicates that alarms on these trunks are not downgraded by the set
options.
Note:
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 Administering
Avaya Aura Communication Manager (03-300509). Refer to your Avaya
representative for 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) 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 and DS1 Interface Media
Modules for systems supporting media modules.
For additional repair information, see also DS1-BD (DS1 Interface Circuit Pack) for TN767
ports, UDS1-BD (UDS1 Interface Circuit Pack) for TN464C or higher suffix ports, and MG-DS1
(DS1 Interface Media Module) for Media Module ports.
A DS1 ISDN trunk is a 64-kbps bearer chel used to transmit digitized voice or data traffic. These
trunks, or B-Chels, use a separate chel, the D-Chel 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 chel as the voice or data traffic. One D-Chel, or ISDN
signaling link (ISDN-PLK), carries signaling messages for several B-Chels, forming an ISDN
signaling group (ISDN-SGR).
A B-Chel may be a port on a TN464 series UDS1 circuit pack, a TN767 series DS1 Interface
circuit pack, or an DS1 Interface Media Module.
Two types of DS1 interfaces exist:
● 24 DS0 chels on a 1.544-Mbps link
● 31 DS0 chels + 1 framing chel on a 2.048-Mbps link
Issue 5 May 2009 557