UC500 MWI - doesn't work for newly created range of extensions

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Nov 30th, 2008
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MWI does not work newly created extension outside of the default range i.e. 201-252. For e.g. i create a new extension "7514" to match with my isdn 4 digit suffix. I then create a user and associate a VM to it. VM works but MWI doesn't..Any ideas please.

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ivillegas Fri, 12/05/2008 - 06:59
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MWI will not work if the CME router address and the IP address in the SIP subsystem are different.

Solutions for Cisco Unity Message Waiting Indicator Problems:


Troubleshooting Unity Express Message Waiting Indication (MWI) Problems:


seaman0555 Sat, 12/06/2008 - 06:17
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Are the new extension in the same partition as the existing extensions?

Rob Huffman Sat, 12/06/2008 - 08:40
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Hi Anuj,

The number of dots (....) as shown below should be equal to the extension length being used. In your case this is probably currently set to three which won't work for your new 4-digit DN's. The easiest way to fix this would be to use a consistant DN Length :)


ephone-dn [xxxx]

number 8000....

mwi on

ephone-dn [xxxx]

number 8001....

mwi off

Have a look at this excellent Troubleshooting doc;

Troubleshooting Unity Express Message Waiting Indication (MWI) Problems


Hope this helps!



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