Avaya S8700 - CO-DS1 (DS1 CO Trunk)

CO-DS1 (DS1 CO Trunk)
Issue 1 May 2002
8-435555-233-143
CO-DS1 (DS1 CO Trunk)
NOTE:
Many trunk problems are caused by incorrect settings of parameters on the
trunk group administration form. Settings must be compatible with the local
environment and with parameter settings on the far end. 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
NOTE:
32-channel mode is supported only on TN464 circuit packs and on G3r V2
systems.
The DS1-CO MO monitors and maintains a CO trunk port on either a TN767 DS1
Interface circuit pack or a TN464 UDS1 Interface circuit pack. Throughout this
discussion, the term DS1 circuit pack applies to both. See ‘‘DS1-BD (DS1
Interface Circuit Pack)’’ and ‘‘UDS1-BD (UDS1 Interface Circuit Pack)’’ on page
8-1707 for more information about these circuit packs. The DS1 circuit pack
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’s Name (in
Alarm Log)
Alarm
Level Initial Command to Run
1
1. UU is the universal cabinet number (1–64 for ATM PNC, 1–44 for CSS PNC). C is the carrier
designation (A, B, C, D, or E). SS is the number of the slot where the circuit pack resides (01–21).
pp is the 2-digit port number (01, 02, 03 ...).
Full Name of
MO
CO-DS1 MAJOR
2
2. A Major alarm on a trunk indicates that alarms on these trunks are not downgraded by the set
options command and that at least 75 percent of the trunks in this trunk group are alarmed. For
more information about the set options command, see Chapter 7, ‘‘Maintenance Commands’’.
test trunk group# member# l DS1 CO Trunk
CO-DS1 MINOR test trunk group# member# l DS1 CO Trunk
CO-DS1 WARNING test trunk group# member# DS1 CO Trunk