Maintenance-Object Repair Procedures
555-233-143
8-586 Issue 1 May 2002
DS1-BD (DS1 Interface Circuit Pack)
The DS1 Interface circuit pack provides an interface to an external DS1 facility
and supports 24 DS0 channels carried on a 1.544-Mbps DS1 link. These DS0
channels can be administered as either trunks to other switches or lines to
off-premises stations. The TN464C (or higher-suffixed) Universal DS1 Interface
also supports a 32-channel interface on a 2.048-Mbps link. The functions and
maintenance strategy for the TN464 circuit packs are covered under a separate
MO,
‘‘UDS1-BD (UDS1 Interface Circuit Pack)’’ on page 8-1707.
DS1-BD maintenance logs in-line errors reported by the DS1 Interface circuit
pack, runs tests for error diagnosis and recovery, and raises and clears alarms.
The following table shows the capabilities of each DS1 circuit pack. The TN722
and TN722B are not supported on G3r V1 or later systems.
ISDN-PRI Trunk signaling (for example, Q.921, Q.931) requires a TN464D and is
handled by system software. The TN464 is covered in
‘‘UDS1-BD (UDS1 Interface
Circuit Pack)’’ on page 8-1707
.
Each trunk and line have their own maintenance strategies. However, they all
depend on the health of the DS1 Interface circuit pack. See the following sections
for details: ‘‘TIE-DS1 (DS1 Tie Trunk)’’ on page 8-1621, ‘‘CO-DS1 (DS1 CO
Trunk)’’ on page 8-435, ‘‘DID-DS1 (Direct Inward Dial Trunk)’’, ‘‘OPS-LINE (DS1
Off-Premises Station Line)’’, ‘‘ISDN-TRK (DS1 ISDN Trunk)’’ on page 8-989, and
‘‘ISDN-PLK (ISDN-PRI Signaling Link Port)’’ on page 8-965. Signaling over the
DS1 link must be synchronized between the transmitting and receiving ends to
ensure error-free communication. See ‘‘SYNC (Port-Network Synchronization)’’
for details.
MO’s Name (in
Alarm Log) Alarm Level
Initial SAT 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).
Full Name of MO
DS1-BD MAJOR test board UUCSS sh DS1 Interface circuit pack
DS1-BD MINOR test board UUCSS l DS1 Interface circuit pack
DS1-BD WARNING test board UUCSS sh DS1 Interface circuit pack
Circuit Pack
Code
24
Channel
32
Channel
Tie Trunk
Signaling
CO Trunk
Signaling
DID
Trunk
Signaling
OPS Line
Signaling
TN722/B x x
TN767/B/C/D/E x x x x x
TN464C/D/E/F x x x x x x
(24-chl only)
TN2313 X X X X X X
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