Avaya 03-300430 User Manual
Communication Manager Maintenance-Object Repair Procedures
686 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
The TN2208 LGATE MFB provides Communication Manager with the interface to
Adjunct-Switch Application Interface (ASAI) and Avaya adjuncts (for example, CONVERSANT
Adjunct-Switch Application Interface (ASAI) and Avaya adjuncts (for example, CONVERSANT
®
Voice System). The circuit pack contains 12 ports of line circuit interface (although only 8 are
usable by the switch), each of which operates with two B channels (referred to as B1 and B2
throughout this section) and one D channel. In this context, the term “ISDN-BRI port” is used to
refer collectively to ports on the TN2208 circuit pack that are connected to ASAI or Avaya
adjuncts.
The TN556 and TN2198 ISDN-BRI Line circuit packs provide the system with the interface to
ISDN-BRI endpoints, Adjunct-Switch Application Interface (ASAI) and Avaya 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. In this context, the term “ISDN-BRI port” is used to refer
collectively to ports on the TN556 an TN2198 circuit packs that are connected to either BRI
endpoints, ASAI or Avaya 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
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.
usable by the switch), each of which operates with two B channels (referred to as B1 and B2
throughout this section) and one D channel. In this context, the term “ISDN-BRI port” is used to
refer collectively to ports on the TN2208 circuit pack that are connected to ASAI or Avaya
adjuncts.
The TN556 and TN2198 ISDN-BRI Line circuit packs provide the system with the interface to
ISDN-BRI endpoints, Adjunct-Switch Application Interface (ASAI) and Avaya 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. In this context, the term “ISDN-BRI port” is used to refer
collectively to ports on the TN556 an TN2198 circuit packs that are connected to either BRI
endpoints, ASAI or Avaya 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
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.
on page 687 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-AJ/
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:
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-AJ/
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:
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