Physical Installation44 Installation Manual3.3 Connect the Computer Terminal Unit with RS-232C CableTo initialise a newly installed KX-TDA0480 using the Maintenance Console Software UnitInformation Setup Wizard, a computer or terminal must be connected directly to the unit usingan RS-232C serial cable (cross) with DB9 Female to DB9 Female connectors. The pinconfiguration for the serial cable is shown in Figure "RS-232C pin configuration".RS-232C pin configurationTo connect the computer with the KX-TDA04801. Turn the computer power OFF.2. Connect the RS-232C cable to one of the computer's com ports (e.g., Com 1) and to theSerial Port connector on the KX-TDA0480 front panel as shown in Figure "KX-TDA0480serial port connection".RS-232C port on the KX-TDA0480 COM port on the PC (9 pin)Circuit Type(EIA)SignalName Pin No. Pin No. SignalNameCircuit Type(EIA)BB RD (RXD) 2BA SD (TXD) 3CD ER (DTR) 4AB SG 5CC DR (DSR) 6CA RS (RTS) 7CB CS (CTS) 82 RD (RXD) BB3 SD (TXD) BA4 ER (DTR) CD5 SG AB6 DR (DSR) CC7 RS (RTS) CA8 CS (CTS) CBRS-232C port on the KX-TDA0480 COM port on the PC (25 pin)Circuit Type(EIA)SignalName Pin No. SignalNameCircuit Type(EIA)BB RD (RXD) 2BA SD (TXD) 3CD ER (DTR) 4AB SG 5CC DR (DSR) 6CA RS (RTS) 7CB CS (CTS) 81 FG AA3 RD (RXD) BB2 SD (TXD) BA20 ER (DTR) CD7 SG AB5 CS (CTS) CB6 DR (DSR) CCCF4 RS (RTS)Pin No.