Multi-Tech Systems MULTIVOIP MVP210/410/810 - Manual (Page 43)

Chapter 4: Configuring your VOIP
Multi-Tech Systems, Inc. 43
Message Waiting
Message Waiting Indication is a feature that displays an audible or visible indication that a message
available. A type of message waiting is sounding a special dial tone (called stutter dial tone), lighting a light,
or indicator on the phone.
When a user enables a subscription for message waiting indication, a subscription is made with the Voice
Mail Server (VMS) for that particular event. Whenever the Voice Mail Server finds a change in the state of a
corresponding mailbox or some event happens (e.g., when a new voice message is recorded or a message
is deleted, then the VMS server sends a notification to the gateway. Its indication to the user is a flashing
LED or sounding a stutter dial tone.
The message waiting feature is active when the Use SIP Proxy option is selected on the Call Signaling SIP
screen, a Primary Proxy IP address is entered in the SIP Proxy Parameters Primary Proxy field, the Voice
Mail Server Domain Name or IP Address is entered in the SIP Voice Mail Server Parameters Group, and the
Interface Type is set to FXS (Loop start). Then the FXS Options Group becomes active. The Message
Waiting Indication options are None, Light, or Stutter Dial Tone.
Figure 4-5: Message Waiting
To receive messages from the VMS (Voice Mail Server/System), the subscription needs to be enabled and
the voice mail server address has to be entered in the SIP Voice Mail Server Parameters Group.
The Voice Mail server IP Address, Port and Re-subscription time are configured on the SIP Call Signaling
screen. When this is configured, the “Subscribe with Voice Mail Server” option is activated in the inbound
phone book. Only when this option is enabled, the subscribe message will be sent to the VMS.
The following sequence needs to be done to enable all of the Message Waiting Features:
1. The "Use SIP Proxy" must be enabled, and the SIP Proxy Parameters and Voice Mail Server Parameters
in the SIP Call Signaling Menu must be set, and the Interface Type option must be set to FXS (Loop Start)
on the Interface menu's "Message Waiting Indication" options become active.
2. Then the "Message Waiting Indication" options must be set to light or stutter tone for the "Subscribe to
Voice Mail Server" option to become available in the Inbound phone book entry with that channel selected.
3. In order to send Subscriptions for Inbound Phone Book entries, all the following four conditions have to be
satisfied:
• The user needs to enter a valid voice mail server domain name or IP address in the Voice Mail Server
Domain Name/IP Address field on the Call Signaling screen.
• For an Inbound Phone Book entry, a subscription with Voice Mail Server checkbox is enabled on the
Add or Edit Inbound Phone Book entries screen.
• The Channel type corresponding to that Inbound phone book entry has to be FXS on the Interface
screen.
• The Message Waiting Indication has to be either Light or Stutter Dial Tone on the Interface
Parameters screen.
The password on the Interface screen is used for that particular channel when a “SUBSCRIBE” request is
sent (i.e., if the MultiVOIP gets a 401/407 response from a subscribe request. Then it will take the configured
password, calculate the response, and resend the “SUBSCRIBE” request.