User guide

Chapter 4—Configuring your VOIP
Multi-Tech Systems, Inc. 34
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 (for example, 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.
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. To send Subscriptions for Inbound Phone Book entries, all of the following conditions are met:
● 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
(that is, 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.