Kenwood TK-890 Allstar Node Interface Pinouts Acc 25 pin D-sub Connector:

Pin 2 ptt
Pin 18 GND
Pin 20 TOR
Pin 17 AUDIO
Pin 13 MIC

TK890 pin 13 goes to Sound Fob/URI RX audio signal. TK890 pin 17 goes to Sound Fob/URI Mic signal. TK890 pin 20 TOR auxiliary output 1 to be programmed A01 via FPU selectable option within the TK890 programming Software KPG-44D output Function port. TK890 pin 2 PTT auxiliary input 1 to be programmed AI1 via FPU selectable option within the TK890 programming Software KPG-44D Input Function port for external PTT.