DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Maintenance Object Repair Procedures
9-564DS1-BD (DS1 Interface Circuit Pack)
9
DS1-BD (DS1 Interface Circuit Pack)
The DS1 Interface circuit pac k provides an interface to a n external DS1 facility
and supports 24 DS0 ch annels carried on a 1.544 Mb ps DS1 link. These DS0
channels can be ad ministered as either trunks to other switc hes or lines to
off-premises stations. The TN464C and later suffix Universal DS1 Interface also
supports a 32-channe l interface on a 2.048Mbp s link. The functions and
maintenance strategy for the TN464 circ uit packs are covered under a separate
maintenance object, UDS1-BD.
DS1-BD maintenance logs in-line errors reported by the DS1 Interface c ircuit
pack, runs tests for error diag nosis and recovery, and raises and clears alarms.
The following table shows the cap abilities of each DS1 circuit p ack. The TN722
and TN722B are not supported on G3r V1 or later systems.
ISDN-PRI Trunk signaling (for examp le, Q.921, Q.931) requires a TN464D and is
handled by system software. The TN464 is covered in the "UDS1-BD (UDS1
Interface Circuit Pack)" section of Chapter 9.
Each trunk and line have their own maintenanc e strategies. However, they all
depend on the health of the DS1 Interfac e circuit pac k. Refer to the following
sections for details: TIE-DS1, CO-DS1, DID-DS1, OPS-LINE, ISDN-TRK, and
ISDN-PLK. Signaling over the DS1 link must be synchronized b etween the
transmitting and receiving ends to ensure error-free communic ation. Refer to
"SYNC (Synchronization)" for details.
MO Name (in
Alarm Log) Alarm Level Initial Command to
Run1
1. UU is the universal cabinet number (1 for PPN, 2 - 44 for EPNs). C is the carrier designation (A, B,
C, D, or E). SS is the number of the slot in which the circuit pack resides (01 to 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 t est 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)