I'm at Spain using ISP Telefonica / Movistar. Users who have Fiber Internet can configure SIP clients to receive and make calls from the computer, and *Jitsi* works great with it, by using the *REGISTER *method every 30 seconds I ensure that call doesn't drop when I'm talking for more than 10 minutes.
The problem is that when I receive any incoming call, *Caller ID is set to null*, but despite of that, Caller ID is set on the SIP header packet.
Can you solve this?
More info in the attached images.