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Troubleshooting & Maintenance B
B.1 Terminals/PC
Problems
Cable error
Port settings
incorrect
No flow control
Port flow
controlled
Wrong flow
control
If you encounter problems when installing or using your
Terminal Server, try the suggestions given in this chapter.
Hopefully, the problems can be solved quickly, otherwise
contact Black Box support. Email or fax as described in
section 1.3, Getting Support .
If your terminal or PC connection is not working properly,
symptoms are usually no output at all, 'garbage' on the
screen, loss of characters or ports locking. Here is the
common solution checklist to these problems:
Replace the cable with a known good one or test the cable
ends. Check the wiring against Appendix C, Cabling Guide .
This is the number one problem. It is helpful to have a null
modem cable and a RS-232 mini-tester.
Check the set-ups of the Terminal Server and the terminal
ensuring that they are the same at both ends. Check parity,
bps rate, flow control, data bits and stop bits.
Set flow control to be the same at both ends and ensure that
the cable installed is capable of supporting it.
It is possible that an XOFF character has been received by
mistakenly typing
terminal off and on and type
If the XON and XOFF characters are configurable on the
terminal check that they are set to
(0x13). If the application you are using is transferring binary
data then software flow control cannot be used as some of the
binary data may be interpreted as flow control characters.
Troubleshooting & Maintenance
or other condition. Power the
.
(0x11) and
119
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