AT&T MERLIN LEGEND Release 3.1 Installation Manual page 248

MERLIN PFC
You should remove the Voice Announce feature from the fax extension.
If the dedicated fax line is shared for outgoing calls only, you must program
the Ringing option to No Ring at every extension except the MERLIN PFC fax
extension.
The MERLIN PFC can operate in Hybrid/PBX mode, Behind Switch mode, or
in Key mode. The following sections list differences in operation between the
two modes.
Hybrid/PBX and Key Modes
The dedicated fax line for incoming fax calls from the central office must be
connected to a line jack on the control unit, and the line cannot be assigned
to a pool.
If DID is used, a DID number must be assigned to the fax extension.
If a dedicated private line is used, assign a fax line to the voice extension.
No lines or pools can be programmed to the fax extension. At the fax
extension, the dedicated fax line should be programmed to Immediate Ring
and any other lines should be programmed to No Ring.
Behind Switch Mode
The dedicated fax line should be programmed to the MERLIN PFC fax
extension.
The dedicated fax line should be assigned as a secondary (no ring) line at the
voice extension.
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Installing Applications