Not able to make outbound call using the ENGIN account.

[bidhan]

not able to make a outbound call. Attached is the SIP header fields to 3CX Call Variables. Is the variables configured properly?

 

[bidhan]

SIP Server/Call Manager ID: 12294
Call or Registration to 1300366911@(Ln.10001@ENGIN) has failed. 203.161.160.71 replied: 403 Authentication Failure; from IP:203.161.160.71:5060

This is error i get in event log

 

[YiannisH_3CX]

Hello @bidhan

The error you are getting suggests that the trunk cannot authenticate to the provider so that might be caused to the authentication credentials used. Check the account details and try again.
If the issue persists and you are still getting the same message i would recommend contacting the provider and asking them what is it they don't like so you can adjust accordingly.