Motorola Desk Consoles
From W3AXL Wiki
Desk consoles are controllers which function as extra control heads for the attached radio and are able to control most or all the functions of the host radio, including PTT, transmit and receive audio, and menu interfacing. Over the years there have been several deskset systems made for various lines of radios, and most of these consoles support the SB9600 protocol for radio control.