2 SIP protocols (and weird port)

[tm1000 (Andrew Nagy)]

That is PJSIP and CHANSIP. CHANSIP is old. Pjsip is new. You decide which one you want to use.

Chan_sip vs pjsip

I recently created a 13 FreePBX I see working with PJSIP I do not know the difference … Can anyone help me understand Or indicate how to document in detail? Else If I decide to use “SIP chan” how can I change the 13 to work with “SIP chan”?