You may want to state the the Service provider and type of Trunk Lines you are connected to,,, Looks like you need a DTMF Tester ,to prove if the PBX is a issue or the Service provider ,, it seems to only happen on incoming outside calls, which seems to be a service provider issue. Does it do it if you call in on a different incoming trunk ??
Last edited by ATechguy; 03/09/17 10:13 AM.
