[Asterisk-Users] Malformed/Missing Contact field??

[Eric Wieling]

Anyone know what this message means?

    -- SIP/2113-945d answered SIP/111.222.96.14:5060
    -- Attempting native bridge of SIP/111.222.96.14:5060 and SIP/2113-945d
    -- Got SIP response 400 "Bad Request - 'Malformed/Missing Contact field'" back from 111.222.96.14


111.222.96.14 is a Cisco 1750 with a VIC-2FXS and a VIC-2FXO. 
The call comes into the Cisco, gets sent to the Asterisk server,
the Asterisk server rings the FXS port on the Cisco.  If I pick
up the ringing phone on the FXS port I get the above message.