Registering a Cisco 7961 Phone

[strobelight]

A little progress. I found the SIP registration process actually expects a "401 Unauthorized" with the first registration attempt. That initial 'unauthorized' should contain a challenge. The SIP client then uses the challenge to create a response. It seems the VOIPo server is doing its job and creating the challenge, but my phone is ignoring the challenge and resending the original registration packet. I verified the packet is the same every time my phone sends it except the sequence number.

I suspect a bug so I'll load a later version (9.3.1SR4) later and re-test. If I ever get this working, I'll post the configs!

[strobelight]

I upgraded to 9.3(1)SR4 and couldn't get it to even attempt to register. I've downgraded back to 8.5(2) and am back at square 1. Please reply with any ideas.