Lucent Technologies MERLIN LEGEND Release 5.0 Feature Reference page 122

MERLIN LEGEND Communications System Release 5.0
Feature Reference 555-650-110
Features
Basic Rate Interface (BRI)
Considerations and Constraints
Because the 391A, 391A1, and 391A2 power supplies have limited capacity,
when one of these power supplies is used, the total number of 800 NI-BRI
modules and 100D modules in a single carrier cannot exceed three. When using
these power supplies with more than three modules, you must install the fourth
and any additional 800 NI-BRI or 100D modules in an expansion carrier. The
391A3 power supply eliminates this restriction.
A Directory Number (DN) is busy when no extension is available to answer or
cover the call. An extension may be unavailable when one of the following
conditions applies: no SA button (aside from Originate Only buttons) is available;
Do Not Disturb is activated; the extension is being programmed; the extension is
forced idle; or, the extension alarm clock is being set. The caller hears a busy
tone, or the call receives coverage, if programmed.
For BRI lines, the SMDR format should be set to ISDN format.
In Release 4.1 and prior systems, an SMDR record is not recorded for a BRI
facility call that is shorter than the programmed SMDR call length. Usually, the
SMDR call length is programmed to compensate for connection and ringing time
of calls on non-ISDN facilities before they are answered. In systems where most
lines are ISDN lines, the call length should be programmed for one (1) second.
In Release 4.2 and later systems with the SMDR Talk TIme option enabled, call
timing for incoming calls to Auto Logout or Auto Logout calling groups begins
when the system detects the call.
Feature Interactions
Account Code Entry
Barge-In
Call Waiting
At an extension assigned to a BRI line, either enter an account code
before the call is made or during the call. Forced account codes must be
entered before the call is made.
If the SMDR feature is not enabled to record incoming calls, the system
does not accept Account Code Entry information for incoming calls.
Barge-In can be used for voice calls on a BRI line, but not data calls.
Call Waiting is provided on BRI lines at extensions so programmed. The
call-waiting tone is not blocked from BRI at an extension.
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Issue 1
June 1997
Page 90