Thank you for the information. 

I have deployed hundreds of Aastra Phones so far no major problems and complains. There are some firmware issues in earlier versions.

In my scenario FreeSWITCH 17155 working and 17188 is not working.

Thanks
Lloyd

On Sun, Apr 4, 2010 at 3:05 PM, Brian West <brian@freeswitch.org> wrote:
That snom error means you don't have the SRTP set to optional... because a=crypto in an RTP/AVP is invalid.

Again I don't trust the aastra's cuz I have personally seen them fuck up in production with no changes to FreeSWITCH.  Check the invites... mine started sending 0.0.0.0 in the sdp on initial invites.

/b

On Apr 4, 2010, at 1:57 PM, Aloysius Lloyd wrote:

> There is no firmware update on Aastra. Only change in FreeSWITCH.
>
>
> Snom 320 throwing the following Error.
>
> 2010-04-04 14:04:44.588816 [ERR] sofia_glue.c:3380 a=crypto in RTP/AVP, refer to rfc3711