How to connect a Yealink phone, Cheapconnect sip number and trunk to Freepbx

FreePBX Configuration
1

Is there somewhere documentation how to setup yealink ip phone with Sip and Trunk from Cheapconnect to FreePBX?

2

I know nothing about CheapConnect, but based on

try these trunk settings:

SIP Server: voip.cheapconnect.net
Username: (starts with 31)
Secret: (your SIP password)
From User: (same as username)
From Domain: (same as SIP Server)

If you have trouble, paste the Asterisk log for a failing call, with pjsip logger on, at pastebin.com and post the link here. If it won’t register, paste a registration attempt instead.