AT&T MERLIN LEGEND Release 4.0 Feature Reference page 152

Feature Reference
With the primary coverage configuration, calls are handled as follows. A caller
dials a DID number (for example 555-5512). The extension for the DID number
(for example, extension 12) rings several times. If the telephone is not
answered, the call is covered by an operator. If the operator fails to answer, the
call goes either to voice mail or keeps ringing, depending on the Coverage VMS
Off status on the extension for the DID number. The operator answers the call
and the caller asks to leave a message. The operator transfers the caller to the
extension's voice mail (for example, extension 12) using Direct Voice Mail. The
caller leaves a message at the extension and the extension's message light
goes on.
Phantom Calling Groups
If fewer than 30 extensions require coverage to the main operator, phantom
calling groups can be used to provide a second extension number for each
user's voice mail. The actual extension covers to the operator (Group Coverage)
and the calling group covers to voice mail. When someone dials the user's
number, the call covers to the operator, who can then transfer the call to the
voice mail extension.
To set up phantom coverage to the operator before going to voice mail
coverage, do the following:
Assign an extension (for example, 101) to a coverage group. Assign a
Group Cover button to the operator (if a DLC), or assign the coverage
group to ring at the QCC.
Renumber a calling group (for example, 771 to 201). You may have to
renumber 201 first.
Assign the calling group (for example, 201) to overflow to calling group
770 (Voice Mail) with a threshold of 1. Assign 101 as the message
receiver for calling group 770.
With the phantom calling groups coverage configuration, a caller dials a DID
number (for example 555-5101). The extension for the DID number (for
example, Extension 101) rings several times. If the telephone is not answered,
the call is covered by an operator. The operator answers the call, and the caller
asks to leave a message. The operator transfers the call to 201, and the call
goes to voice mail, the Message light goes on at the extension for the DID
number (for example, 101).
NOTE:
A user can give out a regular telephone number (555-5101) and a voice mail
number (555-5201). This way, callers can leave a message without ringing the
telephone. This is necessary to receive messages outside of office hours.
Callers cannot leave messages after hours unless they know the second DID
number.
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Coverage