One of our installations were working for several months, but for the last few days, I've noticed that the digital receptionists seem to be inconsistent. When I call one of the inbound numbers, sometimes the IVR answers the phone and other times does not. I was able to determine why the results were inconsistent. I found that the issue occurs consistently for: - inbound calls using an external Vonage VOIP service AND only when the caller's area code is the same as the phone number they are dialing (IVR works correctly for 1-800 numbers and those different area code). - however, if CALLER ID is blocked then from the same caller, then there is no issue. It looks like 3CX suddenly doesn't like the caller ID for some inbound calls. The issue does NOT occur when: - using my mobile phone to test, the IVR correctly kicks in regardless of which phone number I call. Hopefully this is not affecting many of our customers. Not sure if it's Vonage only, or if other inbound callers are affected also.