2 - Tx (Transmit Data) 4 - RTS (Request to Send)

• 2 - Tx (Transmit Data) 4 - RTS (Request to Send)

• 3 - Rx (Receive Data) 5 - CTS (Clear to Send)

• 7 - GND (Signal Ground) 8 - DCD (Data Carrier Detect)

• 6 - DSR (Data Set Ready)

• 1 - Frame GND 20 - DTR (Data Terminal Ready)

• 22 - RI (Ring Indicator)