A

Directory, Prompts, Messages

Unity

Message Access Directory Access Prompt Access

Voice-Mail Port 1 Voice-Mail Port 2 Voice-Mail Port 3 Voice-Mail Port 4

The voice-mail ports in CUCM are specialized SCCP-controlled computer telephony integration (CTI) ports. These ports are in control of the related Cisco Unity Voicemail Ports via the Telephony Application Programming Interface (TAPI) service provider (TSP) on Cisco Unity.

Using the Voicemail Ports, Cisco Unity connects the call, playing prompts and recording the messages.

Upon finishing the recording, Unity initiates a call to the MWI On extension through CUCM. The signaling of the call contains the number of the extension that has to switch the message-waiting lamp on.

CUCM then instructs the indicated phone to activate the MWI.

Accessing Messages

Figure 18-5 illustrates an internal call to the voice mail allowing a subscriber to check a voice mail.

Figure 18-5 Message Access Call Flow

CUCM

MWI on Extension MWI off Extension

Voice-Mail Pilot CUCM Hunt List

Voice-Mail SCCP Port 1 Voice-Mail SCCP Port 2 Voice-Mail SCCP Port 3 Voice-Mail SCCP Port 4

Figure 18-5 Message Access Call Flow

CUCM

MWI on Extension MWI off Extension

Voice-Mail Pilot CUCM Hunt List

Voice-Mail SCCP Port 1 Voice-Mail SCCP Port 2 Voice-Mail SCCP Port 3 Voice-Mail SCCP Port 4

Controls Terminating SCCP Port Identifies Subscriber Plays Prompt

Plays Recorded Voice-Mail Calls MWI off Extension

SCCP Control with Unity TSP"

Cisco Unity

Directory, Prompts, Messages

Controls Terminating SCCP Port Identifies Subscriber Plays Prompt

Plays Recorded Voice-Mail Calls MWI off Extension

SCCP Control with Unity TSP"

Unity

Message Access Directory Access Prompt Access

Voice-Mail Port 1 Voice-Mail Port 2 Voice-Mail Port 3 Voice-Mail Port 4

The call will be routed to the voice-mail pilot number assigned to the hunt pilot of the voice-mail hunt list.

The voice-mail hunt list selects the line group, which will use the top-down distribution algorithm to distribute the call to a voice-mail port to terminate the incoming call.

The voice-mail ports in the CUCM are specialized SCCP-controlled CTI-ports. These ports are in control of the related Cisco Unity Voicemail Ports via the Cisco Unity-CM TSP.

Using the Voicemail Ports, Cisco Unity connects the call, identifies the user, plays prompts, and plays back the messages.

When messages are deleted, Cisco Unity initiates a call to the MWI Off extension. The signaling of the call contains the number of the extension that has to switch the MWI off.

CUCM then instructs the indicated phone to deactivate MWI.

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