Features and Specifications Manual I - 13
ISDN-BRI Trunk Connections
I-6
FEATURE
DESCRIPTION
Integrated Service Digital Network - Basic Rate Interface (ISDN-BRI) is a
Public Switched Telephone Network (PSTN) service that provides two B
channels and a D channel (2B + D) for voice call trunking. The B channels
provide two CO/PBX connections. Caller ID is usually a standard feature on
ISDN-BRI provided trunks. Caller ID indication displays the calling party
telephone number on the LCD of the Multiline Terminal for CO incoming calls.
This interface provides voice communication path only.
SYSTEM
AVAILABILITY
Terminal Type:
Not applicable
Required Components:
To provide ISDN trunk connection:
• BRT(4)-U10 ETU
• CLKG-U10 Unit
• NT-1 for each BRI (locally provided)
OPERATING
PROCEDURES
SERVICE
CONDITIONS
Data Assignment:
Use Memory Block 1-1-80 (ISDN DTMF Duration/Interdigit Selection) to
specify tone duration (default: 100 ms.) and interdigit time (default 70
ms.) of DTMF signals for the ISDN trunk.
Use Memory Block 1-1-81 (ISDN Dial Interval Time Selection) to specify
the time (default: 4s) between dialed digits.
Use Memory Block 1-8-33 (Master Clock Selection) to assign the
necessary source for synchronization of T-1 clocking.
None
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