I have my DID number inbound-mapped to my IVR with "press 1 for Bob, 2 for Stephanie". It works fine, except... When I get a call from my partner who is running an Asterisk PABX and Grandstream phones, and he presses 1, my 3CX sees "111". For the time being I added an unregistered extension 111 that I ruled to my extension, so he still gets through to me. But this is strange. He claims that DTMF-ing from his phone works normally when not calling me... Any one have any ideas?