does N80 support 'canreinvite'?

[cristinamj]

Ive heard that some phone do not support 'canreinvite' from Asterisk. what about N80?

[forceps]

I don't know personally, but if you have access to an N80, that should be relatively easy to test. Just set canreinvite=yes for your N80 entry in sip.conf and watch what happens when a known reinvite capable peer tries to call the N80. Asterisk always tries to step out of the rtp path if it believes that the two peers it is relaying for support reinvite. If successful, asterisk will step out of the media path and simply handle call control traffic only. The rtp traffic will only go between the two peers in the call.

You can watch the sip debug or just watch the general traffic. If you have a router that they're passing through that you can watch, then see if the packets headers change such that now the two peers have traffic directly between them instead of both directing all traffic to the asterisk server.