Avaya 9600 / 96xx / 9640 MWI

Asterisk Asterisk Endpoints
1

Hi. I have some Avaya 9640 telephones connected to Asterisk. The phones are flashed to SIP 2.6.17 firmware and they seem to be working nice. Something I cannot get working is MWI and I am hoping someone out there has a solution.

I have been searching like mad and find generally the following…

  • change the chan_sip source code and recompile

  • MWI works but I can only see these very few reports when using really old firmware

From the above, I can’t go back to using old firmware and changing chan_sip seems a huge overhead and soon, I will move to pjsip (long overdue).

All typical phones I use, Aastra, Grandstream, Yealink, Zoiper for example all work out the box with MWI but the Avaya ones just don’t seem to take.

Any experience out there would be greatly appreciated.

2

You might try creating new sections in /etc/asterisk/sip_notify.conf to test toggling MWI on/off then try sending those NOTIFYs directly to the phone via Asterisk CLI “sip send notify …”