I am having issues registering a CME (2811 with 12.4.24.T) with an ITSP. When I use the configuration below, I see CME send a Register request to them but they then send back a "404 not found".
When I asked the ITSP why they are not sending back a 401 authentication challenge in response to my register request they said that they do not want me to register with them but instead send them an "authenticated call" with the ITSP provided username and password. I have no idea what that means.
Can CME send authentication on a call-by-call bases or an "authenticated call"? What would that configuration look like?
voice service voip
allow-connections h323 to h323
allow-connections h323 to sip
allow-connections sip to h323
allow-connections sip to sip
no supplementary-service sip moved-temporarily
no supplementary-service sip refer
voice class codec 1
codec preference 1 g711alaw
codec preference 2 g711ulaw
voice class h323 1
call start slow
no call preserve
dial-peer voice 200 voip
description Inbound / Outbound to ITSP
voice-class h323 1
voice-class sip early-offer forced
session protocol sipv2
session target ipv4:<IP address>
session transport udp
incoming called-number .
credentials username <username> password <password> realm <realm>
authentication username <username> password <password>
registrar ipv4:<IP> expires 3600