How to fix Sip peer ACL Regecting "ip" due to a failure to pass ACL?

Question

Asterisk

Good afternoon tell me dear sirs what is the problem.
sip is not connected to 2 ip with 3 ip, everything is ok.
The essence of the error Sip peer ACL Regecting "ip" due to a failure to pass ACL "name" in iptables everything is ok.
My guess is that it is connected with the router settings from the differences where internal ip works start at 192.168.0.0 the same 2 phones that do not work both sit behind routers with ip 10.0.0.0. In Google they also wrote about codecs - I tried to add all the options in the config to no avail. I tried to turn off iptables in general, to no avail!
This problem appeared on these handsets a couple of weeks ago - we called the admin and he did something, everything worked for a couple of weeks - the admin did not want to answer my question, what was the reason.
I would be grateful for comments that will help to understand what is the cause and how to treat.