Cisco Systems OL-12397-13 Voice Mail

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Cisco BTS 10200 Softswitch SIP Feature and Provisioning Guide, Release 5.0

OL-12397-13

Chapter2 SIP Subscribers

Cisco BTS 10200 Softswitch-Based Features

•Call forwarding on no answer variable activation (CFNAVA), call forwarding on no answer variable

deactivation (CFNAVD), call forwarding on no answer interrogation (CFNAI)

•Call forwarding on busy variable activation (CFBVA), call forwarding on busy variable deactivation

(CFBVD), call forwarding on busy variable interrogation (CFBI)

•RACF Pin Change

Voice Mail

The voice-mail (VM) feature on the BTS 10200 allows subscribers to retrieve waiting voice messages

from a VM server. The BTS 10200 receives a message-waiting indication (MWI) from the VM server

and forwards the MWI to the subscriber’s handset. The subscriber can then retrieve messages from the

server. The VM feature is available to individual subscribers and Centrex subscribers.

SIP trunks interconnecting the BTS 10200 to an external VM server must be provisioned as SIP VM

trunks. To do that, you set the VM flag (voice-mail-trunk-grp) for these trunks in the softsw-tg-profile

table. (See the “SIP Trunk to Voice-Mail Server” section on page3-46.)

Note For a description of the basic VM feature, see the “Voice Mail and Voice Mail Always” section in the

Cisco BTS 10200 Softswitch Network and Subscriber Feature Descriptions document. For general VM

provisioning details, see the “Provisioning Voice Mail” section in the Cisco BTS 10200 Softswitch

Provisioning Guide.

The following voice mail-related actions are supported in the BTS10200:

•VM Deposit

•MWI Notification

•Retrieving VM

•Calling Back a Message Depositor

There are two methods for depositing voice mail. In the first, the subscriber dials the pilot number for

the VM server, and the call terminates on the voice-mail trunk. The VM system then collects the message

for a target mailbox, using Interactive Voice Response (IVR) prompts to guide the subscriber.

This method of depositing voice mail does not use any special BTS10200 capabilities; it just requires

that the VM SIP trunk is provisioned and the pilot number is added to the dial plan of the subscriber

calling the VM system.

In the second (more common) method, the subscriber activates a call forwarding feature on the

BTS 10200, such as CFNA, CFU, or CFB, and specifies the forwarding number as the pilot number of

the VM server.

When a SIP phone registers with the BTS 10200, the BTS1 0200 sends an unsolicited SIP NOTIFY

message to convey the MWI status to the phone. This occurs on every registration, including refreshes.