Matt Schmandt

There is a known issue with Avaya IP phone’s Message Waiting Indicator(MWI) with Asterisk 1.2 and 1.4. If you have the phone configured with a mailbox line in the sip.conf, the light will never come on. Worse after about 24 hours, the phone with freeze and need to be restarted.

After lots of work testing many different configurations, I finally found a way to get the Message Waiting Indicator working. I am using Avaya 4610sw phones with the latest SIP firmware from Avaya which is the March 07 release. The version of Asterisk is the current Trunk version.

There was some major work done on the Message Waiting Indicator code and SIP subscriptions in the Trunk and I believe that is what fixed it. All the new code should go into the future 1.6 release. I have heard it rumored that we should expect 1.6 around the end of 07.

This entry was posted on Monday, August 6th, 2007 at 23:22 pm and is filed under Asterisk. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.