I am using a Trixbox 188.8.131.52 installation, which by default has Asterisk version 184.108.40.206. Everything is fine here. I have many installations with this software and Cisco 79xx phones using SIP that work very well.
I wanted to try chan_sccp_b (to test some 7914 sidecars with Cisco 79xx handsets), but chan_sccp_b wouldn’t properly compile and load with this version of asterisk, so I downloaded the latest 1.6 version (220.127.116.11) from the Asterisk.Org website - along with the latest addons, dahdi and libpri.
I have compiled and installed all of the latest 1.6 software and Asterisk starts OK. The problem is that my Cisco 79xx phones will no longer register (I tried a 7960 and a 7975). Interestingly, a sip softphone (X-Lite) could still register using the same account as my test SIP 79xx phone.
If I downgrade back to 18.104.22.168 the 79xx SIP phones instantly register with no config changes neccessary.
Everything is on a local network, with NAT=no.
Does anyone know what config changes may be required to get Cisco SIP phones working with the latest 1.62.18 version of Asterisk? The only similar message in the forum suggests using proxy_register: “1” in the Cisco config, but I had that already.