DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1807TSC-ADM (Administered Temporary Signaling Connections)
9
TSC-ADM (Administered Temporary
Signaling Connections)
No alarms are generated for Administered Temporary Signaling Connections
(TSC-ADM, also called ADM TSCs).
Administered temporary signaling connections provide a path through ISDN-PRI
networks for supplementary D-channel messages. ISDN-PRI applications such
as the Distributed Communications System (DCS) use temporary signaling
connections to exchange user information across an ISDN-PRI network. What
makes Administered TSCs unique is that these particular TSCs stay active for an
extended period of time, similar to a permanent data connection. These ADM
TSCs are used for DCS features that require Non-Call Associated (NCA) TSCs,
and the ADM TSC provides the logical channel function in a DCS network.
An NCA TSC is a virtual connection established within a D-channel without
associating any B-channel connections. The connection provides user-to-user
service by exchanging USER INFORMATION messages without associated
B-channel connections.
An Administered TSC is a special NCA TSC defined for the DCS over the
ISDN-PRI D-channel. The ADM TSC has an administratively defined endpoint
and is established for an extended period of time.
There are two types of ADM TSCs:
■ Permanent
These are established by the originating PBX (Near-end ADM TSC) or by
the terminating PBX (Far-end ADM TSC). Once these ADM TSCs are
established, they remain active.
■ As-Needed
These are established only when needed.
ADM TSC maintenance provides a strategy to verify that a far-end can respond
to an ISDN-PRI USER INFORMATION TSC heartbeat message, thereby
indicating that user-user signaling is functioning. In addition, maintenance can
retrieve the status of the ADM TSC’s connection state.
Since ADM TSCs are administered on a per signaling group basis, the health of
an ADM TSC also depends on the state of the D-channel or D-channel pair
administered per signaling group. Refer to ISDN-SGR documentation for details
on ISDN-PRI NFAS and D-channel Backup maintenance.
MO Name (in
Alarm Log)
Alarm
Level
Initial Command
to Run Full Name of MO
TSC-ADM none none Administered Temporary Signaling Connections
