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UDS1-BD (UDS1 Interface Circuit Pack)
Issue 4 May 2002 10-1839 555-233-123
Throughout this MO on the UDS1-BD, the term TN464 will mean any TN464C or
later suffix UDS1 circuit pack. If part of this section refers to a specific suffix
TN464 board, it will be noted as such.
The UDS1 maintenance strategy includes logging in-line errors reported by the
UDS1 circuit pack, running tests for error diagnosis and recovery, and raising or
clearing maintenance alarms.
TN464 circuit packs support the following:
■
Digital Tie, CO, and DID trunks
■
DS1 off-premises (OPS) lines
■
Narrowband and wideband access endpoint ports
■
ISDN-PRI trunks and accompanying signaling channel
■
PRI endpoint ports (PE-BCHL) and accompanying signaling channel
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 MO 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 MOs 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 result from the UDS1 circuit pack’s
direct interface to the Packet Bus 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 UDS1 circuit pack, combined with the 120A1 CSU Module forms an
Enhanced Integrated CSU. The 120A1 CSU Module, when combined with the
functionality provided by the TN464F hardware and firmware, and switch
software, provides functionality equivalent to an external stand-alone Avaya ESF
T1 CSU. The 120A1 CSU Module connects to the UDS1 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 this MO, the
term 120A1 will mean a 120A1 or later suffix CSU Module.