Server Alarms - Avaya Support

Communication Manager Maintenance Object Repair Procedures
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
Avaya adjuncts. The D-Channel is used for conveying signaling between the switch and a BRI
endpoint(s), ASAI or Avaya adjunct. Each ISDN-BRI D-Channel is connected to the switch
processor and the ISDN-BRI port through the packet bus.
ISDN-BRI endpoints are available in various configurations. Every endpoint requires 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 Avaya adjunct may be connected to an ISDN-BRI port.
Multiple adjuncts per line are not supported.
Figure 39: ISDN-BRI Port Interactions 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 Avaya 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-ADJ/LGATE-ADJ/
LGATE-AJ) or Avaya adjunct (ATT-ADJ/ATTE-AJ). These interactions should be kept in mind
when investigating the cause of ISDN-BRI port problems. For more information about the circuit
pack, see:
● BRI-BD (ISDN-BRI Line Circuit Pack)
● BRI-SET, Various Adjuncts
and for more information about its endpoints, see:
● ASAI-ADJ (ASAI Adjunct)
● ATT-ADJ (Avaya Adjunct)
● LGATE-AJ (Ethernet ASAI Endpoint)
592 Maintenance Alarms for Avaya Communication Manager, Media Gateways and Servers