HELP! I can't get my Cisco CP-7960G IP hardphone to register on my Asterisk VoIP IP PBX SIP Server with FreePBX GUI

[teoenming (Turritopsis Dohrnii Teo En Ming)]

Good day from Singapore,

I seem to have found the solution at FreePBX community forums. Please
check out the following discussion thread.

Discussion Thread: Cisco 7940 registration problem RESOLVED
Link:

Cisco 7940 registration problem RESOLVED

Hi, Been working on migrating over to Asterisk 13 / FPBX 12, and wanting to control my Cisco endpoints with OSS EPM. Starting with the phones that have support out of the box - the Cisco 7940. Using a PJSIP extension, I can confirm that the extensions are working via a softphone. When I fire up the Cisco 7940 it has trouble registering. Watching a tcpdump I can see… Phone sends a REGISTER with no auth details (as normal) Asterisk replies with 401 UNAUTHORIZED (the REGSITER challenge, norm…

But I don’t understand very well what users at this discussion thread
are talking about. Can someone help me understand better after reading
through the above discussion thread?

For your information, I am using PJSIP extension instead of CHAN_SIP
extension.

I am planning to work on my Cisco 7960 IP phone registration problem
this coming Christmas 2020 weekends.

Thank you very much for your kind assistance.

Mr. Turritopsis Dohrnii Teo En Ming
Singapore