[Asterisk-Users] SIP Response 400

[Eric Wieling]

I'm getting the following message:

    -- Executing Dial("SIP/2111-b825", "SIP/818505551212 at 2111") in new stack
    -- Called 818505551212 at 2111
    -- SIP/2111-0bd5 answered SIP/2111-b825
    -- Attempting native bridge of SIP/2111-b825 and SIP/2111-0bd5
    -- Got SIP response 400 "Bad Request - 'Malformed/Missing Contact field'" back from 172.16.17.1


172.16.17.1 is a Cisco 1750 box using SIP and an FXO card.

Any ideas on what might cause this?

--Eric