I only provide one telephone to most people. This telephone number is a Google Voice number which uses rules to direct calls as I see fit. I do have other telephone numbers, but these are never provided – again because the Google Voice number is all I need to give out.
The telephone number of +1 412 253 2956 is my telephone number and issued to anyone that would want my telephone number. This is a Google Voice number, and has been in my possession since early 2000’s. When someone calls, the call is routed based on the conditions I set. When I make an outgoing call, the telephone number as above is displayed.
Anonymous Callers are automatically sent to my voicemail with a greeting explaining they are going to voicemail because they are calling anonymously. Since I don’t call anonymously, I would expect the same treatment.
Right now, Unknown callers are sent to my cellular phone. If I don’t wish to accept unknown callers, I can deselect SIM 2 to prevent such calls from ringing my phone. The cellular network will simply see that line as off. If I get too many unknown callers, I will then route such calls to my home phone.
These callers will ring my primary phone at all times. In addition, those that are marked with a star in my Contacts will ring the home phone at any time. This is to assure that I will get what I would consider as very important callers. All Known Callers will ring SIM 1 on my cellular phone.