Avaya Communication Manager Administrator's Manual page 951

Extension
Each Extension field is an extension that matches your dial plan. A user dials the extension
from their Extension to Cellular telephone to activate an FAC administered for that feature.
Valid entries
0–9 or blank
Note:
The Transfer to Voice Mail FNE is used when a user is active on a call and
Note:
wants to transfer the other party to voice mail, or to the principal's voice mail, if
this is a covered call. This FNE can also be used when a user goes off-hook for
the first time and dials the Transfer to Voice Mail FNE to be connected to the
voice mail administered in his coverage path. This is identical to dialing a
Transfer to Voice Mail feature access code (FAC).
Usage
Type an extension number, up to seven digits, for the Communication
Manager feature you want users to access from their Extension to
Cellular telephones. Default is blank.
Extensions to Call Which Activate Features by Name
Issue 2.1 May 2006 951