Black Box ServSwitch SW721AE-R2, User Manual

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“R2” SERVSWITCH
5. Troubleshooting
The first two sections of this chapter discuss things to try when problems arise in a
ServSwitch system. If the trouble you’re having with the Switch is something you
haven’t seen before, or if the trouble seems minor, try the procedures detailed in
Sections 5.1 and 5.2 before doing anything else.
The third section of this chapter suggests possible causes and solutions to
frequently encountered problems; if the trouble is chronic, see
Section 5.3 .
Sections 5.4
and
5.5
discuss what’s involved in calling Black Box and shipping your
ServSwitch.
CAUTION
We strongly recommend that you avoid opening the ServSwitch’s cover.
If for some reason you need to do this, be very careful to replace each
screw in the same hole you took it from. There are three different
lengths of screws involved, and putting a longer screw in a hole
reserved for a shorter screw can ground the chassis to the circuit
boards and cause serious damage.
5.1 Diagnostic Information
If you’re having difficulty with the ServSwitch, there is always the possibility that it
has accidentally been configured or set incorrectly. To receive diagnostic
information from a ServSwitch, including the current settings of its parameters,
take these steps:
1. Establish a remote-control connection with the ServSwitch as described in
Section 4.4 . (If you want to be able to save or print this information, or even
see the first part of it before it scrolls off the screen, you should connect the
ServSwitch to a computer running a terminal-emulator program set to
“capture” mode.)
2. Press the ServSwitch’s NEXT and SCAN buttons simultaneously, then return
them to their previous positions. The unit should immediately begin sending
ASCII text of a diagnostic report out of its RS-232 port.
You might want to compare the reported conditions with the default and possible
settings listed in
Appendix A
and the command descriptions in
Sections 4.2
and
4.3 .