This document explains how to assign two extensions to the same
mailbox. This scenario is beneficial, for example, when you handle multiple
line appearances on subscriber phones or forward calls from multiple extensions
to the same mailbox.
This functionality has been added to Cisco Unity 3.0 and 3.1 within the
subscriber settings. Refer to
Alternate Extension Settings for more information.
There are no specific requirements for this document.
The information in this document is based on these software and
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
Refer to the
Technical Tips Conventions for more information on document
This is general information on Alternate Extensions.
Alternate extensions cannot exceed 30 characters in length. By
default, each administrator-defined alternate extension must be at least 3
characters in length, while subscriber-defined alternate extensions must be at
least 10 characters.
Advanced Settings tool in Tools Depot can be used in order to
specify a minimum extension length for the extensions entered in the Cisco
Unity Administrator and the Cisco Unity Assistant. Refer to the Advanced
Settings Tool Help for details on how to use the settings. Respectively, the
settings are Administration > Set the Minimum Length for Locations,
and Administration > Set the Minimum Length for Subscriber-Defined Alternate
You can control whether subscribers can use the Cisco Unity Assistant
to view the alternate extensions that you specify in the Cisco Unity
Administrator. In order to do this, choose Subscribers > Class of
Service > Profile page. The Subscriber-Defined Alternate Extension
table displays the alternate extensions that the subscriber adds.
Cisco Unity verifies that each alternate extension is unique up to
the dialing domain level, if applicable before you allow either an
administrator or a subscriber to create it. The Cisco Unity Administrator or
the Cisco Unity Assistant accepts an extension that is already assigned to
another subscriber, for example, either as a primary or alternate extension, or
to a public distribution list, call handler, directory handler, or interview
All alternate extensions use the same transfer settings as the
Complete these steps in order to assign two extensions to the same
From the Cisco Unity System Administration web page, choose
Call Management and click Call Routing. Then
click Forwarded Calls.
From the Forwarded Calls Call Routing window, click
Add in order to add a routing rule.
Type a name such as Second extension for mailbox xxxx.
In the Forwarding Station field, type the second extension number:
In the Send Call To field, choose Subscriber, then
choose the subscriber originally assigned to extension xxxx.
In the Subscriber Selection dialog box, choose Send to
Click Save in order to save this routing
Open Cisco CallManager Administration and go to the phone with
extension yyyy: Device > Phone > Search directory number yyyy
> select device > select line appearance yyyy.
Make sure that the Forward No Answer and Forward Busy options for
phone line yyyy are set to the voice mail pilot number.
Place a call to extension yyyy and verify that on No
Answer or Busy, the call is
forwarded to the greeting of the subscriber with extension xxxx in order to
verify that your configuration works properly.
There is currently no specific troubleshooting information available
for this configuration.