Instruction manual

Networking and connectivity
555-233-767128 Issue 4 May 2003
Trunk types and signaling
Auxiliary trunks
Auxiliary trunks connect devices in auxiliary cabinets with Communication
Manager. Some of the features that are supported with this type of trunk are
recorded announcements, telephone dictation service, malicious call trace, and
loudspeaker paging.
Advanced Private Line Termination (APLT)
Provides access to and termination from CO (Central Office)-based private
networks; namely, Common Control Switching Arrangements (CCSA) and
Enhanced Private Switched Communications Service (EPSCS).
APLT trunks are physically the same as those used for analog tie trunks, where the
trunk signaling is compatible with EPSCS and CCSA network switches. The
outgoing APLT trunk repeats any number of digits to the private network as
dialed. APLT trunks can tandem through the PBX from EPSCS network only;
CCSA networks require an Attendant to complete the call.
Central Office (CO)
Central Office (CO) trunks connect Communication Manager to the local central
office for incoming and outgoing calls.
Central Office (CO) support on G700 Media
Gateway — Russia
See ‘‘Central Office (CO) support on G700 Media Gateway’’ on page 99.
Digital multiplexed interface
The digital multiplexed interface feature supports two signaling techniques:
bit-oriented signaling and message-oriented signaling for direct connection to host
computers.
Digital multiplexed interface offers two major advantages:
■ digital multiplexed interface delivers a standard, single-port interface for
linking host computers internally and externally through a T1 carrier.
■ Since it is compatible with ISDN standards and is licensed to numerous
equipment manufacturers, digital multiplexed interface promotes
multi-vendor connectivity.