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 Luc ent ISDN-BRI Specification. In this context, the term
"ISDN-BRI port" is used to refer collectively to ports on the TN2208 circ uit 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, Adjunc t-Switch Application Interface (ASAI)
and Lucent adjunc ts (for example, CONVERSANT®. Voice System). The circuit
packs contain 12 p orts of line circuit interface , each of which operates with two
B-channels (referred to as B1 and B2 throug hout this section) and one D-c hannel
as specified in the Luc ent 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 wh ich are connected to either B RI endpoints or ASAI or Lucent
adjuncts.
For BRI endpoints, each B-channel may sup port voice or circ uit-switched data
and may be circ uit-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 end point(s) or ASAI or Lucent
adjunct.
ISDN-BRI endpoints are available in various configurations. All endpoints require
the D-channel to convey signa ling information to the switch. Only one B-c hannel
is required for a voice-only s et or a stand-alone data module (BRI-DAT). A voice
and data-cap able set requires both B-channels (one for voice and one for data).
Therefore, each TN556 or TN2198 port can suppor t either two voice-only sets,
two stand-alone data modul es (BRI-DAT), or one voice and data-capable set.
Only a single ASAI or Lucent adjunc t may be connected to an ISDN-BRI port.
Multiple adjuncts per line are not supported.
Figur e 3-11 illustrates the physical connec tion (solid line) between an ISDN-BRI
Port and its associated ISDN-BRI set(s). Each physic al 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 voic e and voice/data se ts or ASAI or
Lucent adjuncts. On a TN2198 each ISDN-BRI circ uit pack can supp ort up to 12
physical
connections to a NT1, which, in turn, c onnects to 2 terminals.
This section covers the maintenance d ocumentation for ISDN-BRI ports. Some of
the results of maintenance testing of ISDN-BRI ports may b e affected by the
health of the ISDN-BRI Line circuit pack (BRI-BD), BRI endp oint (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 c ircuit pack and endpoints, refer to
the BRI-BD (ISDN-BRI Line Circuit Pack) Maintenance documentatio n, the
BRI-SET (ISDN-BRI Endpoint) Maintenance doc umentation, and ASAI-AJ
(Adjunct-Switch App lication Interface) Maintenanc e documentation, ATT-AJ
(Lucent Adjunct) Mainten ance documentation, LGATE-AJ (Ethernet
Adjunct-Switch App lication Interface) Maintenanc e documentation, and ATTE-AJ
(Ethernet Lucent Adjunct) Maintenanc e documentation.