... to RS232 Converter PCI to RS232 Converter cable PCI to USB Converter GSM/GPRS Modem Accessories Inductrial Modem Acc PCI to RS232 Converter Cable 8-RS232 to ... 5V DC or 5V, +12V,-12V are optional. Interface signal electric level range is wide Working temperature: 0 - 55° ... Communication controller: 16c950 consistent (Oxford) Capacity of FIFO: 256 byte Signal: TXD, RxD, RTS, CTS, DTR, DSR, DCD, GND ...