Partyline : TW-47 interfacing to Motorola 2-way radios
Found a website that offers Motorolaaccessories, link: http://www.planetheadset.com/motorola-radio-accessories.php Appears that the M4 accessoryconnector/adapter would allow the user to convert to the M1 style connector(3.5 / 2.5 mm pair) which is shown in the TW-47 manual.