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[FAQ] How can I change / define the number my phone calls to retrieve a voice mail message?

Polycom Employee & Community Manager

[FAQ] How can I change / define the number my phone calls to retrieve a voice mail message?

The Admin Guide defines the following Parameters:


  • msg.mwi.x.callBackMode

Possible selections are contact, registration or disabled and the default setting is registration.




  • The message retrieval mode and notification for registration x. contact – a call is placed to the contact specified by msg.mwi.x.callback. registration – the registration places a call to itself (the phone calls itself). disabled – message retrieval and message notification are disabled.

The follow up parameter to above is:


  • msg.mwi.x.callBack



  • ASCII encoded string containing digits (the user part of a SIP URL) or a string that constitutes a valid SIP URL (6416 or
    The contact to call when retrieving messages for this registration if msg.mwi.x.callBackMode is set to contact.

In order to define a specific number to be dialed in order to retrieve a voice mail message the below configuration can be used.


<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<!-- Polycom Community Message Center Contact example file Fri Dec 13 09:54:00 2013 -->
<polycomConfig xmlns:xsi="" xsi:noNamespaceSchemaLocation="polycomConfig.xsd">
      <msg.mwi.1.callBackMode msg.mwi.1.callBackMode="contact" msg.mwi.1.callBack="5555"/>

 Above example set's the voice mail message center call back mode to a contact and defines the number to call as 5555. Only the first registration / line ( 1 ) of the phone is defined to do so.


The attached file can either be imported via the => Web Interface <= or loaded via a => provisioning server <=.


The above can also be changed via the Web Interface:



Please be aware:

The purpose of these forums is to allow community members collaborate and help each other.
Questions posted here do not follow Polycom’s SLA guidelines.
If you require assistance from Polycom technical support, please open a
web service request or call us .

The above is necessary in order to track issue internally within Polycom.

You are welcome to post more questions or configuration or logs for other community members to look at but if your issue requires a fix via Polycom you must go via the official support structure.

Please ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's

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This forum reply or post is based upon my personal experience and does not reflect the opinion or view of my employer.
Polycom employee participation within this community is not mandatory and any post or FAQ article provided by myself is done either during my working hours or outside working hours, in my private time, and may be answered on weekends, bank holidays or personal holidays.