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PHONE LINE MANAGER 16 X 4
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13. Rollover Extensions:
Advanced Topics
Any number of extensions can be configured to be a Rollover Extension. These extensions have special
properties. Generally, calls directed to extensions which are busy or do not answer will be directed to an
available Rollover Extension. Typically, extensions connected to a Voice Mail unit or to an answering
machine would be designated as Rollover Extensions though it is possible to configure any extension to be a
Rollover Extension. It is also possible to assign an Exclusive Answering Machine to an extension. When the
Phone Line Manager 16 x 4 wants to ring an available Rollover Extension (due to the conditions listed
below), it will first check to see if there is an Exclusive Answering Machine available for the extension.
The Phone Line Manager 16 x 4 will ring an available Rollover Extension or Exclusive Answering Machine
when:
• An incoming call has been ringing for greater than a specified amount of time (5 to 60 seconds). See
Section 19.11.
• The MSG button on a key phone is pressed (if Voice Mail is enabled).
• An intercom call was attempted to an extension which is in the Do Not Disturb mode (if Rollover on
Intercom Calls is set). See Section 13.2.
• An intercom call was attempted to an extension connected to an ordinary phone which is busy (if
Rollover on Intercom Calls is set).
• An intercom call was attempted to an extension connected to a busy key phone or to any phone which
does not answer within five rings (if Rollover on Intercom Calls is set).
• An outside line has been blind transferred to an extension which does not answer or parked at an
extension which does not answer (provided the “Transfer to Operator/Rollover Extension” parameter
specifies Rollover Extension).
• After the Operator is rung and does not answer after a call left on hold for too long rings at the
Operator. See Section 19.11.
When the Phone Line Manager 16 x 4 is looking for a Rollover Extension, it checks the extensions in the
order of physical extension #00 to extension #15 to find an extension which is both available and designated
to be a Rollover Extension.
13.1 Exclusive Answering Machine Privilege
The Rollover Extensions feature allows you to specify which extension(s) will be rung when a call is directed
to an extension which is busy or does not answer. More than one extension can be specified as a Rollover
Extension so that a multi-channel Voice Mail unit can be attached to the Phone Line Manager 16 x 4.
In some installations, you may want to give separate answering machines to certain people to allow
messages intended for them to be stored and retrieved independently. This may now be done as part of the
“Programming the Extensions” command (see Section 4.2).