incoming call problem

[Tanvir Mahedi]

Incoming call is always rejected.
it says " number is busy"

 

[Alphabetic]

More info please.

incoming call route, line info? what says number is busy?

 

[craigreilly]

likely the inbound number does not match anything in the Trunk or Inbound Routes.
I generally prefix the number with a * and keep about 7 digits to match.
ie: *5551212

 

[eddv123]

I would agree with @craigreilly but check your activity logs (in verbose mode) and see what the PBX reports (if anything): https://www.3cx.com/docs/collecting-logs-for-3cx-support/