AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual page 170

Applications
Specify the VMS Transfer Return Interval, that is, the number of rings
before a call transferred by the MERLIN MAIL Voice Messaging System
is sent to the backup position (system operator).
Set Inside (intercom) Dial Tone to outside.
Assign call restrictions to each VMI port used to connect the MERLIN
MAIL Voice Messaging System.
When the Automated Attendant is used only for Night Service:
—
— Specify immediate answer (one ring) for the VMI ports.
— Specify the VMS calling group as the Night Service operator
Platform Requirements
The following equipment is required to connect the MERLIN MAIL Voice
Messaging System to the system:
MERLIN MAIL Voice Messaging System unit and power cords
Remote maintenance device (a modem with a wall-mounted transformer)
Modem cable with a 9-pin connector at one end and a 25-pin connector
at the other, for connecting the modem to the serial pod on the MERLIN
MAIL Voice Messaging System unit
D4BU modular cords (two for a two-port system or four for a four-port
system, plus one for the modem)
012 module (a ring generator is required)
NOTE:
Additional TTRs may be needed to allow the 012 module to handle a
large number of voice connections.
If the MERLIN MAIL Voice Messaging System is to be used only for backup call
handling or night service, only one VMI port may be required. For other uses
with heavier call traffic, the number of VMI ports required depends on the
number of incoming lines/trunks, the number of subscribers programmed for
Automated Attendant service, and the number of busy-hour calls. Table 4-4
shows these requirements.
4-14 MERLIN MAIL Voice Messaging System
If the lines/trunks set for answering by the Automated Attendant
Service appear at other extensions, set the no ring option for the
other extensions.