Hi Experts,
I have SIP trunk to ISP and its registered and working. Every two minutes we are sending the REGISTER message, then we get SIP/2.0 401 Unauthorized, then sends the REGISTER with authorization string and gets 200 OK from ISP. This is normal.
Now ISP requested us to send re-register message every 2 minutes. Re-register message should contain authorization header so that they no need authenticate all the time.
Is there any way we can achieve this?
Thanks.
