3Com - 3Com Flexible Interface Card Module - Expansion module - RS-232, X.21, V.
RS232 RS422/RS485 REVERSIBLE CONVERTER W/MULTIDROP SURGE CONVERT
Belkin Parallel/serial adapter Parallel/serial adapter
REVERSIBLE CONVERTER (C36M) - RS-232 (DB25/F/DCE)
RS232 TO RS422(485)BI-DIRECTIONCONVERTER NON-POWER
THE UC4852 IS THE CONVERTER THAT TRANSFORM THE USB PORT TO YOUR COMPUTER INTO TW
PS/2 - USB CONVERTER
REVERSIBLE CONVERTER W/512K BUFFER/Ver.A) (C36M) - RS-232 (DB25/F/DCE)
USB SERIAL PORTABLE ADPTR
CUSTOM MODULAR ADAPTER DB25M/RJ45F
