First Virtual Communications 065-7710 Appendix B Null Modem Cable Specifications ,

Signamax ™ 065-7710 8-Port 10/100BaseT/TX + 2SFP Managed Switch
Publication date: January, 2006
Revision A1
243
Appendix B
Null Modem Cable
Specifications
The DB-9 cable is used for con ne cting a terminal or terminal emulator to the
Managed Switch’s RS-232 port to access the command-lin e interface.
The table below shows the pin assignments for the DB-9 ca ble.
Function Mnemonic Pin
Carrier CD 1
Receive Data RXD 2
Transmit Data TXD 3
Data Terminal Ready DTR 4
Signal Ground GND 5
Data Set Ready DSR 6
Request To Send RTS 7
Clear To Send CTS 8
9 Pin Null Modem Cable
CD 1 4 DTR
DSR 6 1 CD
DTR 4 6 DSR
RXD 2 3 TXD
TXD 3 2 RXD
GND 5 5 GND
RTS 7 8 CTS
CTS 8 7 RTS
Reserve 9 9 Reserve