FreePBX 12 + Cisco 7975

I have built a new FreeBPX 6.12 server and have a Cisco 7975 phone for testing

Created an extension on FreePBX
Uploaded config and to tftp
Installed OSS Endpoint Manager
Created Entry for phone MAC

What works on the phone:

  • boots
  • downloads/installs firmware
  • pulls config from FreePBX (can see getting the xml file in the phone log)
  • line and phone name appear

What does not work on the phone:

  • keeps saying registering phone
  • line has an “X” beside the phone icon

NAT is set to off as the phone and FreePBX are all on the same subnet

So i can see the phone is getting its configuration, but then whatever is meant to happen next with FreePBX to access the extension is not working

the line secret/password is correct in the config as is the line name… the line is a PJSIP line

I also tried the phone config without OSS with a manual file, using files from Cisco Call Manager as a template too and got the same result

I’ve spent around 100 hours troubleshooting this, but haven’t gotten anywhere, also the FreePBX logs are as good as useless, i can see the tftp session but nothing more from the phone trying to connect or register…

Any ideas ?