AT&T MERLIN LEGEND Release 4.0 Feature Reference page 359

Feature Reference
If the external alert is used to supplement ringing only for calls received on
personal lines (outside lines assigned to buttons), the same outside trunks and
ringing options assigned to the MLX telephone should also be assigned to the
MFM. In this arrangement, the MFM device does not ring when inside calls are
received on an SA or ICOM button.
An external alert connected to an MFM set for SAA operation can be manually
signaled, can serve as a calling group Calls-in-Queue Alert, or can provide
supplemental alerting for after-hours calls received in a Night Service group.
Only a strobe or other light should be used as a Calls-in-Queue Alert; if a bell is
used, it rings continuously while the number of calls in the calling group queue
exceeds the programmed threshold.
Programming Requirements
Although the devices connected through an MFM may not have buttons, the
system treats them as multiline telephones with 34 buttons. In Hybrid/PBX
mode, the system automatically assigns one SA Ring, one SA Voice, and one
SA Originate Only button to the MFM. In Key mode, the system automatically
assigns one ICOM Ring and one ICOM Voice button to the MFM. In Behind
Switch mode, the system automatically assigns one ICOM Ring, one ICOM
Voice, and one prime line button.
NOTE:
Do not attempt to enter extension programming from a device connected to an
MFM. Make changes to programming for an MFM through centralized telephone
programming only.
To ensure proper operation of devices connected through an MFM, the
following should be assigned through centralized telephone programming:
Voice Announce to Busy should be disabled.
The SA or ICOM button assignments should be changed to one SA Ring
or ICOM Ring and one SA Originate Only or ICOM Originate Only
button.
Ringing/Idle Line Preference should be enabled.
The Automatic Line Selection sequence should be set to the following:
SA Ring or ICOM Ring
SA Originate Only or ICOM Originate Only
In Key and Behind Switch modes, outside lines that make calls from
the MFM device
In Behind Switch mode only, the prime line
Multi-Function Module
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