File:External rs232 serial dialup fax modem.jpg - Wikimedia Commons
Null modem cable
Virtual Serial Port Kit - Articles - Different Null-Modems
MSP430 UART interface with GSM/GPRS modem - MSP low-power microcontroller forum - MSP low-power microcontrollers - TI E2E support forums
Cablaggi Seriali
Security Dial-up Modem - Click IT Direct
rs232 - Major difference between DTR signal and RTS signal? - Arduino Stack Exchange
Null modem cable
Comunicazione seriale
Setting up RTS/CTS protocol (hardware flow control) printers
Serial Port Programming Part 8 - DTR and DSR
RS-232 Connections That Work: Connecting Devices or Converters - Advantech
Building the Null Modem Cable
RS-232 Connections That Work: Connecting Devices or Converters - Advantech
RS/232 Pinouts & Cables
Serial Port and Modem Cables
ch4 rs232
Virtual Null Modem > Typical null-modem schematics
Industrial PSTN and Leased Line Modem | TD-36 AV ᐅ Westermo
Virtual Serial Port Kit User Manual - Using Different Null-Modem Schemes
net - C# SerialPort DSR/DTR and CTS/RTS handshaking - Stack Overflow
RS-232 Connections That Work: Connecting Devices or Converters - Advantech
device6.gif
1 The 9-Pin Connector Pin abbreviations (numbers in parentheses are the 25D pin numbers): 1. CD (8) 2. RD (Rx) (3) 3. TD (Tx) (2) 4. DTR (20) 5. SG (Ground) - ppt download
