I have DP750-720 (FW 22.214.171.124) on Issabel PBX (asterisk 13)
It does normally Register
External calls works fine
Μy problem is that i can’t get incoming calls
– Connected line update to SIP/105-0000000a prevented.
– Got SIP response 486 “Busy Here” back from 192.168.1.103:8060
– SIP/103-0000000b is busy
== Everyone is busy/congested at this time