Information Technology Reference
In-Depth Information
3.
CUCM transfers the call (once again using SCCP or SIP) to the Unity Connection
server. The extension of the originally called phone is contained in the signaling mes-
sages, which allows Unity Connection to send the call to the correct voicemail box.
After the caller leaves a message on the voicemail server, Cisco Unity Connection then
“makes a call” (via SCCP or SIP) back to a Message Waiting Indicator (MWI) extension on
the CUCM server. CUCM then lights the voicemail indicator on the Cisco IP Phone, alert-
ing the user that they have a voice message waiting. All this interaction between CUCM
and Unity Connection is done using voicemail ports, which are licensed features. The
more voicemail port licenses you purchase for the Unity Connection server, the more con-
current communication it supports. Be sure to purchase enough licenses! You should con-
sider calls to the auto-attendant, checking voicemail, leaving voicemail, and MWI
communication in the number of supported voicemail ports.
Note:
Cisco Unity Connection can fully integrate and support CME deployments. Many
organizations use a centralized Unity Connection voicemail cluster to support many CME-
based remote offices.
Cisco Unified Presence promotes an awareness of the VoIP and data networks. Many
folks commonly use Instant Messenger (IM) clients to communicate. In these applica-
tions, you are able to see the status of a user, gauging whether they are available, busy, or
offline before you begin to chat with them. Cisco Unified Presence stretches this capabil-
ity to the voice network, allowing you to see the status of a user (are they on the phone,
off the phone, not available, and so on) before you pick up the phone to dial. In addition
to this core functionality, Cisco Unified Presence adds the following capabilities to your
voice network:
Enterprise instant messaging:
Unified Presence incorporates the Jabber Extensi-
ble Communication Platform (XCP), which is an industry standard method of com-
municating between different IM clients.
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Message compliance:
Many industries require strict compliance guidelines on in-
stant messenger communication. Cisco Presence supports logging functionality for
all types of IM communication (even conversations encrypted with Transport Layer
Security [TLS]).
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Interdomain federation:
Unfortunately, this feature has nothing to do with Star
Trek; however, it has everything to do with connectivity. Using Interdomain federa-
tion connections from Unified Presence, you can connect your organization to other
domains, such as Google Talk or WebEx Connect, thus giving you worldwide reach.
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Jabber XCP extensibility:
XCP allows you to extend Unified Presence into virtu-
ally any area of the data or voice network. XCP can allow features such as peer-to-
peer file sharing, application sharing, video-conference systems, and so on. XCP
integrates with nearly any infrastructure, such as directory services, databases, and
web portals.
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