A LOW COST ALTERNATIVE FOR TELEPHONE INTERCONNECT WITH A PORTABLE RADIO
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Nov-30
Previously, complicated repeater/base hardware was required to make an interconnection or patch to the telephone system from a remote, half-duplex portable radio. This situation exposed the need for a simple, inexpensive method by which the small scale customer, the one with two or three talk-and-listen units, can make or receive a telephone call remotely using his radio with a DTMF touch pad.