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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-1170UDS1-BD (UDS1 Interface Circuit Pack)
3
The TN464 supports digital Tie, CO, and DID trunks, and OPS lines. On-board
firmware performs call control signaling for the Tie, CO and DID trunks and OPS
lines. ISDN-PRI trunk and PRI endpoint signaling (Q.921, Q.931) is received and
generated by system software and is transmitted on a system link through the
TN1655 Packet Interface and packet bus to the UDS1 where it is placed on the
D-channel. Signaling over the DS1 link has to be synchronized between the
transmitting and receiving ends to ensure error-free communication. Refer to
‘‘SYNC (Synchronization)’’
in this chapter for details.
Each trunk, line or endpoint has its own maintenance strategy but all depend on
the health of the UDS1 Interface circuit pack. Refer to the following sections for
details: TIE-DS1, CO-DS1, DID-DS1, OPS-LINE, ISDN-TRK, ISDN-LNK,
ISDN-SGR, WAE-PT and PE-BCHL. The maintenance strategy for the TN464
UDS1 Interface circuit pack (UDS1-BD) is very similar to the maintenance
strategy for the TN767 DS1 Interface circuit pack (DS1-BD). The same
commands are used for administering and testing the boards. The differences in
maintenance strategy between the boards are due to the UDS1 circuit pack’s
direct interface to the Packet Bus which is used for ISDN-PRI signaling
(ISDN-LNK). While both the TN464 and TN767 can support ISDN-PRI
B-channels, ISDN-PRI D-channel signaling applications require a TN464 UDS1
circuit pack.
The TN464F or later circuit pack combined with the 120A1 CSU Module forms an
Enhanced Integrated CSU. The new 120A1 CSU Module, when combined with
the functionality provided by the TN464F hardware and firmware, and new switch
software, provides functionality equivalent to an external stand-alone Lucent ESF
T1 CSU. The 120A1 CSU Module connects to the TN464F circuit pack on the I/O
connector panel on the back of the port carrier. The new CSU Module, thus
becomes an integrated part of the DEFINITY. system. Throughout the document,
the term 120A1 will mean a 120A1 or later suffix CSU Module.
The Enhanced Integrated CSU is for use in the United States of America with
1.544 Mbps DS1 service. For further details on the 120A1 CSU Module see
DEFINITY Communications System Generic 1, Generic 2, and Generic 3 V1 and
V2 - Integrated CSU Module Installation and Operation
.
The TN464F and 120A1 CSU Module support on-demand loopback tests that
assist in the detection of faults between the TN464F circuit pack and the CSU
Module, between the Integrated CSU and the optional Customer Premises
Loopback Jack, or between the Integrated CSU and remote CSU. These
loopback tests are explained in detail later in this UDS1-BD section, but Figure
3-47 gives a high level overview of the loopback points.