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Trunk Management
DEFINITY Enterprise Communications Server Release 8.2
Overview
555-233-002
Issue 1
April 2000
Full ETSI Functionality
The full set of ETSI public-network and private-network ISDN features is officially
supported. This includes Look-Ahead Interflow, Look-Ahead Routing, and Usage
Allocation. It also includes all QSIG supplementary services supported through R8:
■ Name Identification
■ Call Diversion (including rerouting)
■ Call Transfer
■ Path Replacement
It does not include:
■ DCS
■ Non-Facility Associated Signaling
■ D-Channel Backup
■ Wideband Signaling
NT Interface on TN556C
DEFINITY ECS supports the NT (network) side of the T interface using the TN556C
circuit pack. This gives the switch full tie trunk capability using BRI trunks. DEFINITY ECS
supports leased BRI connections through the public network, with a TN2185 on each end
of the leased connection. DEFINITY ECS will not, however, allow customers to
administer both endpoints and trunks on the same TN556C circuit pack.
Call-by-Call Service Selection
Enables a single ISDN-PRI trunk group to carry calls to a variety of services, rather than
requiring each trunk group to be dedicated to a specific service. It allows you to set up
various voice and data services and features for a particular call.
Facility and Non-Facility Associated Signaling
Allows an ISDN-PRI DS1/E1 interface D-channel to carry signaling information for
B-channels (voice or data). D-Channel Backup can also be administered to increase
system reliability.
Wideband Switching
Provides the ability to dedicate 2 or more ISDN B-channels or DSO endpoints for
applications that require large bandwidth. Certain applications, such as video
conferencing and high-speed data transmission, require extra bandwidth and it becomes
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