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10 Network Interfaces and Equipment
DEFINITY ProLogix Solutions Release 2 Overview
555-235-100 Issue 2 June 1999 10-21
Integrated Services Digital Network - Basic Rate Interface (ISDN-BRI)
DEFINITY ProLogix Solutions can connect to equipment or endpoints that support
an Integrated Services Digital Network (ISDN) by using the Basic Rate Interface
(BRI). This feature is a 192-Kbps interface that carries two 64-Kbps B-channels and
one 16-Kbps D-channel.
The ISDN-BRI Trunk circuit pack enables DEFINITY ProLogix Solutions to support
the T interface and the S/T interface as defined by ISDN standards (ITU-T
recommendation I.411). The circuit pack provides eight ports to the network and
supports two B channels and one D channel. ISDN-BRI Trunk provides the
following advantages:
• Provides an inexpensive way to connect to ISDN services provided by the
network provider
• Meets almost all ETSI Country protocol requirements
• Supports essential (not supplementary) ISDN services
DEFINITY ProLogix Solutions Release 2.0 supports the NT (network) side of the T
interface using the TN556C circuit pack. This give DEFINITY ProLogix Solutions
full tie trunk capability using BRI trunks. DEFINITY ProLogix Solutions Release
2.0 supports leased BRI connections through the public network, with a TN2185 on
each end of the leased connection. However, DEFINITY ProLogix Solutions Release
2.0 does not allow you to administer both endpoints and trunks on the same TN556C
circuit pack.