One cable allows multiple laptops to use push-to-talk with multiple programs in digital mode. My older transceiver interface (Rigblaster PRO) required RTS for PTT confirmation and this cable worked fine on Windows 7 and Windows 10. It was recognized quickly on both machines and was stable from boot to boot. The Windows 7 computer searched the internet for drivers but seemed to find them ok without any intervention. Win 10 installed directly. FTDI is the only way out.