Call handling is simple. I have three telephone numbers – each with a particular role. The first number is the one that most people are likely to call with the secondary numbers having a more precise role. The first number, I had since February 2005 while the secondary numbers since January 2020.
The first number was a Google Voice number, and currently is a Google Fi number. This number can do voice calls using a Google Pixel 3a XL. The phone supports RCS, SMS, and WhatsApp as for messaging protocols. If I should decide to drop Google Fi, the phone number will return to Google Voice. In most cases, I am not likely to answer unknown callers, and will never answer Anonymous Callers
The second number is a Home Voice line. This phone number provides an alternative to the cellular line. This number does no support SMS service, but offers free calling to Canada, and I believe Mexico. If I was to call either of those countries, then the CID will show my home voice line. Most cases, I will answer local calls on this telephone line, but will never answer Anonymous Callers.
The third number is a home fax line. It is used exclusively for faxes. Since there is no phone attached to the fax line, there will be no phone calls from this line. In addition, the fax machine answers all calls on the first ring. Therefore, you should only call this number for faxes only. When sending a fax, I would use a created cover sheet. The information about me is at top and centered. The recipient information is in a table below my contact information. The rest is the body of the cover sheet.
You can find all of my phone numbers in my Contact Directory as well as all of my contact details. The first line is a Google Fi service number while the second and third numbers are with Ooma. I do have other numbers, but they are not publically disclosed and have very particular behind the scene roles.