Client not receiving incoming calls

Steps to troubleshoot:

1. Check if the device is registered to the system, fix if no

2. Open Call Info for the problematic call

Please check the hangup cause. It has code 20, which means that the device is unavailable (not registered).
Asterisk log usually shows: WARNING    Unable to create channel of type 'SIP' (cause 20 - Subscriber absent)

3. Retrieve PCAP

 Check if INVITE was sent to the correct IP:PORT

See also

• Cause No. 20 - subscriber absent
• I have a problem with Registration