User guide

Appendix E - Upgrades and Troubleshooting
362 BLACK BOX ® Advanced Console Server
Hardware Test
A hardware test called tstest is included with the BLACK BOX ® Advanced Console Server
firmware. It is a menu-driven program, run by typing tstest at the command prompt. The var-
ious options are described below. Note that the BLACK BOX ® Advanced Console Server
should not be tested while in use as the test will inactivate all ports. You should inactivate all
processes that may use the serial ports: inetd, sshd, cy_ras, and cy_buffering. Following are
the hardware test steps:
Step 1: signal_ras stop.
Step 2: Perform all hardware tests needed.
Step 3: signal_ras start.
Port Test
Either a cross cable or a loop-back connector is necessary for this test. Their pinout diagrams
are supplied in Appendix B - Cabling, Hardware, and Electrical Specifications
. Connect the
loop-back connector to the modem cable and then connect the modem cable to the port to
be tested (or connect a cross cable between two ports to be tested). When tstest senses the
presence of the cable or connector, the test will be run automatically and the result shown on
the screen.
line of data corresponds to a port in test. The last four columns (DATA, CTS, DCD, and DSR)
indicate errors. The values in these columns should be zero. Below is an example of the out-
put screen.
Important! Black Box Technical Support is always ready to help with any con-
figuration problems. Before calling, execute the command
cat /proc/version
and note the Linux version and BLACK BOX ® Advanced Console Server ver-
sion written to the screen. This will speed the resolution of most problems.