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359
Administration for Network Connectivity
555-233-504 — Issue 1 — April 2000 CID: 77730
B Private Networking
• Feature Plus Message Waiting Indication
~ Audio Information Exchange (AUDIX)
Feature Plus MWI depends on the presence of a Message Center. Whenever
DEFINITY ECS acts as a Message Center switch, there is an interaction
between DEFINITY ECS and AUDIX. DEFINITY ECS must be able to
receive messages from AUDIX then, if applicable, send the appropriate
Feature Plus MWI message to the network. Similarly, if DEFINITY ECS
receives a Feature Plus MWI message, DEFINITY ECS translates the Feature
Plus message into the appropriate AUDIX message and passes it to AUDIX.
The only messages that DEFINITY ECS handles are AUDIX messages along
the BX.25 link. Feature Plus MWI can interwork with Basic AUDIX,
including INTUITY AUDIX, and with DEFINITY AUDIX with the DCIU
control link. Feature Plus MWI does not work with the DEFINITY AUDIX
that emulates a DCP voice terminal or with versions of AUDIX that
communicate to DEFINITY ECS mode codes.
DEFINITY ECS implementation requires that all users on a Served User PBX
use the same Feature Plus Message Center. Some of the served users can use a
Feature Plus Message Center, while others use a local message center and/or a
DCS Remote Message Center and/or a QSIG Message Center. However, some
served users on a PBX cannot use one Feature Plus Message Center while
other served users on the same PBX use a different Feature Plus Message
Center.
~ Off-Premise Station
Feature Plus MWI does not work with an off-premise station implemented
with a DS1 circuit pack.
• QSIG
Feature Plus signaling links do not support QSIG.