I'm not trying to register with the Phone Manager. I was just stating that I have successfully configured SIP extensions and authentication on the 250 for Phone Manager. The register request is making it to the ICP, I just keep getting an error. I've tried 2 different sip clients.
SIP/2.0 404 Not Found
Via: SIP/2.0/UDP 192.168.2.250:42155;received=192.168.2.250;branch=z9hG4bK-524287-1---ac8b894dc4931028;rport=42155
From: "Testing" <sip:Testing@192.168.2.200>;tag=bf6cf613
To: "Testing" <sip:Testing@192.168.2.200>;tag=Mitel-5000_769429219-4881
Call-ID: pXL6LLEXSMRBYD0YCzpDPA..
CSeq: 22 REGISTER
Contact: <sip:Testing@192.168.2.200:5060>
Retry-After: 4
Allow: NOTIFY,REGISTER,REFER,SUBSCRIBE,INFO,INVITE,ACK,OPTIONS,CANCEL,BYE
User-Agent: Mitel-5000-ICP-6.3.6.21
Content-Length: 0