MERLIN LEGEND Communications System Release 6.1
Feature Reference
555-661-110
Issue 1
August 1998
Features
Page 66Automatic Maintenance Busy
Automatic Maintenance Busy 2
At a Glance 2
Description 2
When Automatic Maintenance Busy is enabled, a malfunctioning loop-start,
ground-start, or tie line/trunk is automatically put in a maintenance-busy state,
preventing outside calls from being made on that line/trunk. Incoming calls are
never blocked.
In general, the two reasons for putting an outside line in a maintenance-busy state
are as follows:
■ Faulty or delayed signaling between the system and the central office. To
avoid busying out lines because of slow telephone company central office
responses rather than faulty lines/trunks, four consecutive occurrences of
faulty or delayed signaling are required before the line/trunk is put in
maintenance-busy state.
■ Central office failure to disconnect (make the line/trunk available for use)
after a user hangs up. The line/trunk is put in maintenance-busy state after
two occurrences of a failure to disconnect.
When a line/trunk is placed in a maintenance-busy state, an error is recorded on
the internal error log. The log indicates which type of error occurred: faulty or
delayed signaling, or central office failure to disconnect.
Once a line/trunk is in a maintenance-busy state, the three ways to clear the
condition and put the line/trunk back into service are as follows:
■ Periodic testing of the line/trunk by the system’s internal maintenance
software to verify proper functioning
■ Manual clearing of the error from the error log
■ Manual seizure of the line/trunk at an operator console or through
maintenance dial codes
Considerations and Constraints 2
Incoming calls are received and processed normally on lines/trunks that are in a
maintenance-busy state.
Users Affected Telephone users, operators, data users
Reports Affected System Information (
6\V6HWXS)
Mode Hybrid/PBX
System Programming
6\VWHP→0DLQWHQ%XV\
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