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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-269BRI-PORT (ISDN-BRI Port), ABRI-PORT (ASAI ISDN-BRI Port)
3
as specified in the Lucent ISDN-BRI Specification. In this context, the term
"ISDN-BRI port" is used to refer collectively to ports on the TN2208 circuit pack
which are connected to ASAI or Lucent adjuncts.
The TN556C and TN2198 ISDN-BRI Line circuit packs provide DEFINITY with the
interface to ISDN-BRI end points, Adjunct-Switch Application Interface (ASAI)
and Lucent adjuncts (for example, CONVERSANT®. Voice System). The circuit
packs contain 12 ports of line circuit interface, each of which operates with two
B-channels (referred to as B1 and B2 throughout this section) and one D-channel
as specified in the Lucent ISDN-BRI Specification. In this context, the term
"ISDN-BRI port" is used to refer collectively to ports on the TN556C and TN2198
circuit packs which are connected to either BRI endpoints or ASAI or Lucent
adjuncts.
For BRI endpoints, each B-channel may support voice or circuit-switched data
and may be circuit-switched simultaneously. The B-channels are not used on
ports connected to ASAI or Lucent adjuncts. The D-channel is used for
conveying signaling between the switch and a BRI endpoint(s) or ASAI or Lucent
adjunct.
ISDN-BRI endpoints are available in various configurations. All endpoints require
the D-channel to convey signaling information to the switch. Only one B-channel
is required for a voice-only set or a stand-alone data module (BRI-DAT). A voice
and data-capable set requires both B-channels (one for voice and one for data).
Therefore, each TN556 or TN2198 port can support either two voice-only sets,
two stand-alone data modules (BRI-DAT), or one voice and data-capable set.
Only a single ASAI or Lucent adjunct may be connected to an ISDN-BRI port.
Multiple adjuncts per line are not supported.
Figure 3-11
illustrates the physical connection (solid line) between an ISDN-BRI
Port and its associated ISDN-BRI set(s). Each physical connection allows for two
B-channels and one D-channel. Each ISDN-BRI circuit pack can support up to
12 of these
physical
connections to different voice and voice/data sets or ASAI or
Lucent adjuncts. On a TN2198 each ISDN-BRI circuit pack can support up to 12
physical
connections to a NT1, which, in turn, connects to 2 terminals.
This section covers the maintenance documentation for ISDN-BRI ports. Some of
the results of maintenance testing of ISDN-BRI ports may be affected by the
health of the ISDN-BRI Line circuit pack (BRI-BD), BRI endpoint (BRI-SET), or
ASAI adjunct (ASAI-AJ/LGATE-AJ) or Lucent adjunct (ATT_AJ/ATTE-AJ). These
interactions should be kept in mind when investigating the cause of ISDN-BRI
port problems. For more information on the circuit pack and endpoints, refer to
the BRI-BD (ISDN-BRI Line Circuit Pack) Maintenance documentation, the
BRI-SET (ISDN-BRI Endpoint) Maintenance documentation, and ASAI-AJ
(Adjunct-Switch Application Interface) Maintenance documentation, ATT-AJ
(Lucent Adjunct) Maintenance documentation, LGATE-AJ (Ethernet
Adjunct-Switch Application Interface) Maintenance documentation, and ATTE-AJ
(Ethernet Lucent Adjunct) Maintenance documentation.