I am having problems getting an Aastra 57i to make calls through FS.  the phone registers fine, but all calls fail. If i use xlite or a nokia sip phone, i have no problems.

Here is a packet capture of an attempted call:

http://pastebin.freeswitch.org/7039

notice packet 9, it should have been a SIP INVITE, but it turned out to be a Fragmented IP protocol

The phone and FS are both on the same lan subnet, and the phone connects fine with an asterisk server on the same subnet.

Is there a known config for aastra phones that I can reference, or does anyone know why I am having this issue?

-- john