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Design Guide for Cisco Unity Release 5.x
OL-14619-01
Chapter 6 Integrating Cisco Unity with the Phone System
Optional Integration Features
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A minimum extension length for the extensions entered in the Cisco Unity Assistant. See the
Administration—Set the Minimum Length for Subscriber-Defined Alternate Extensions
setting.
See the Advanced Settings Tool Help for details on using the settings.
• You can control whether subscribers can use the Cisco Unity Assistant to view the alternate
extensions that you specify in the Cisco
Unity Administrator. To do so, see the Subscribers > Class
of Service
> Profile page. The Subscriber-Defined Alternate Extension table displays the alternate
extensions that the subscriber adds.
• Neither the Cisco Unity Administrator nor the Cisco Unity Assistant will accept an extension that
is already assigned to another subscriber (either as a primary or alternate extension), or to a public
distribution list, call handler, directory handler, or interview handler. Cisco
Unity verifies that each
alternate extension is unique—up to the dialing domain level, if applicable—before allowing either
an administrator or a subscriber to create it.
• All alternate extensions use the same transfer settings as the primary extension.
• In many cases, Cisco Unity can activate a message waiting indicator (MWI) for an alternate
extension. However, depending on the phones and phone systems involved, some additional phone
system programming may be required to set this up.
Alternate MWIs
You can set up Cisco Unity to activate alternate MWIs when you want a new message for a subscriber
to activate the MWIs at up to 10 extensions. For example, a message left at extension 1001 can activate
the MWIs on extensions 1001 and 1002.
Cisco Unity uses MWIs to alert the subscriber to new voice messages. MWIs are not used to indicate
new e-mail, fax, or return receipt messages.
In Cisco Unified Communications Manager integrations, you can also use the alternate MWI feature to
activate MWIs on a non-integrated phone system that can send and receive information from Cisco
Unity
over an RS-232 serial cable.
Setting Up Alternate MWIs for Extensions on the Same Phone System
Cisco Unity can activate alternate MWIs for extensions on the same phone system. Depending on the
phones and phone systems, some additional phone system programming may be necessary. Refer to the
documentation for the phone system.
MWIs for Extensions on a Non-Integrated Phone System
Cisco Unity can activate MWIs on a phone system that is not integrated with Cisco Unity and that is not
part of a two phone system integration (referred to here as a non-integrated phone system). MWI
activation requests are sent through an RS-232 serial cable. Calls to subscribers that come from the
non-integrated phone system are routed through the gateway to Cisco Unified Communications
Manager.
For this method, you must set up:
• A trunk connection between Cisco Unified CM and the non-integrated phone system through a
gateway.