I am trying to upgrade from a very old asterisk now installation running happily with a couple of Cisco 7970 phones in SIP mode to FreePBX (126.96.36.199). One of the factors driving this is the ability to connect to an extension using multiple devices (e.g. a phone and a softphone), which apparently requires pjsip rather than “standard” SIP.
However, I am unable to get my Cisco register on FreePBX/pjsip instead of Asterisk Now/sip. All I did was to replace the IP address the phone is supposed to connect to.
(Obviously account/extension and password are the same on both systems). However, the phone keeps looping through registration attempts with no success.
Browsing the forums, I get the impression that pjsip was (or is?) not suitable for Cisco phones. Is that still true?
If so, it basically defeats the main driver for switching. Any other options?