MERLIN LEGEND Communications System Release 5.0
Feature Reference
555-650-110
Issue 1
June 1997
Features
Page 63
Automatic Route Selection
Direct Inward Dial (DID) trunks (Hybrid/PBX mode only) are not affected by
Automatic Maintenance Busy because these trunks only can receive calls and are
not pooled.
100D (DS1) modules configured as ground-start, loop-start, or tie lines/trunks are
monitored and maintained by Automatic Maintenance Busy.
No more than 50 percent of the lines/trunks in a pool can be placed in
maintenance-busy state at one time,
except
when the central office has failed to
disconnect a line/trunk (preventing its use) or when an entire line/trunk module is
manually taken out of service (called a
user-imposed
maintenance-busy state). In
the case of the 100D module, any failure in the DS1 link causes the module to
generate a loss-of-service alarm, and the entire module is taken out of service.
Mode Differences
2
Hybrid/PBX Mode
2
To provide optimal performance, Automatic Maintenance Busy should be enabled
when a Hybrid/PBX system includes pools.
Key and Behind Switch Modes
2
Automatic Maintenance Busy is not available in Key and Behind Switch modes.
Feature Interactions
2
Automatic Route Selection
2
At a Glance
2
Alarm
The red LED next to the Alarm button on system operator consoles turns
on, and the designated maintenance alarm alert device sounds or flashes
when more than 50 percent of the lines/trunks in a pool are in a
maintenance-busy state.
Automatic Route
Selection
When Automatic Route Selection (ARS) is used to make an outside call,
the system does not select lines/trunks that are in maintenance-busy
state.
Pools
To provide optimal performance, Automatic Maintenance Busy should be
enabled when a Hybrid/PBX system includes pools.
Users Affected
Telephone users, operators, data users
Reports Affected
Automatic Route Selection, Extension Directory, Extension
Information, Remote Access (DISA) Information
