Incoming call - ring only one time


Hi all,

i have a problem. i confgure a 6202 pbx with 1628 phone. When i receive a call this is forwarded to the extension 100, this extension ring only 1 time (caller id appear on display) and after the first ring on display appear the icon for missed call, after few seconds the extension ring again for two times without caller id then mute again, after 10 seconds happen the same thing.
What i wrong?


are you using analog trunks or sip trunk i believe a solution for anlogue trunks was provided in this post
by Ipneblett