CO-DS1 (DS1 CO Trunk)
Issue 1 May 2002
8-435
555-233-143
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 ch 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
and
‘‘UDS1-BD (UDS1 Interface Circuit Pack)’’ on page
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
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...