Simplex autopatch was very popular round here in the day. Used to be a local here that would let dudes patch into his phone to call family.
Your base rig is interfaced with your home phone. Your range is limited by propagation between your mobile and your home base.
You still have to have a "control" operator present at the base even though your talking to someone on the phone. the phone user is the "third" party.
Radio shack used to sell a simplex autopatch base interconnect box to connect your base rig to Ma Bell. There are other manuafactures also and can be seen for sale.
I know what that it. I used to run MARS patches from a Drake TR-7 to ships in the Gulf from NNN0NHA in Norfolk, VA when I was in the Navy.
My "huh" was aimed at the mobile simplex phone patch capability of the radio being sold. Not sure how that works. You have to have a land based station with a patch interface to landline. By his definition any CB radio in a pickup truck is capable of simplex phone patch operation.