There will be 3 devices that are directly related to the numbers mentioned in this site. Yes, I know there are more telephone numbers than there are devices. However, every number has a role even if that means no device connected with that role. The devices will be an ATA (Analog Telephone Adapter) which the printer will plug into. There will be an iPhone Pro Max. The particular version will depend on which model will be used. For example, I currently have the 14 Pro Max, and might keep this phone for a few more years until it no longer runs good enough. There is also a Grandstream WP825 which is a 2 line SIP phone.
All of these devices will serve the needs for my ideal phone setup. This makes it essential for the needs of the devices to work with the carriers, and the numbers supported by the carrier. The goal will be to use a carrier for at least one phone number, and support all of the carriers with their resources. This section will go into detail of the devices that I will use.