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Documentation Number 232PCIXX4502 Manual 29
B&BElectronicsMfgCo–707DaytonRd-POBox1040-OttawaIL61350-Ph815-433-5100-Fax815-433-5104
B&BElectronicsLtd–WestlinkComm.Pk.–Oranmore,Galway,Ireland–Ph+35391-792444–Fax+35391-792445
CHAPTER 4:
TROUBLESHOOTING
If you have any trouble starting your system after installing the card,
the card may not be properly seated in the slot. Remove and re-
insert it or try a different slot.
If you are unable to communicate with the card using your software
and hardware devices:
1. Check your pinouts. Computer RS-232 ports are always
configured as DTE (Data Terminal Equipment) devices. Some
devices (such as printers, video recorders/editors, cameras)
are also configured as DTE. When two similar DTE devices
are interconnected, a "NULL MODEM" cable is needed (refer
to Appendix B, Table 2, for cabling).A"serial printer cable" is
usually wired as a null modem cable.
2. Some RS-232 connections use only Receive and Transmit
(plus signal common/ground). Sometimes the device "loops
back" the CTS/RTS line pair and the DTR/DSR line pair, but
other times, the loopback must be done within your connection
cable/connector. Refer to the hardware manual for the device
connected.
3. Use the COMTest program provided on the PCI/USB COM
Port Utility Disk with a loop back to check the card. A loopback
connection for RS-232 connects the Transmit output to the
Receive input (pins #2 ontheDB9M connector).
4. Try another software package for troubleshooting.
5. Check our website for available FAQ's or troubleshooting hints.
6. Call B&B Electronics Technical Support for troubleshooting
assistance.
USA Office
Technicians are available at (815) 433-5100 to answer your
questions from 8 AM - 5 PM weekdays (Central Time).
European Office
Technicians are available at +353 91-792444 to answer your
questions from 8:30 AM – 5 PM weekdays (GMT Time).