Black Box ServSwitch SW721AE-R2, User Manual

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4.3.11 I
DENTIFY
ROM
Unfortunately, as with all complex equipment, problems might arise with your
ServSwitch that require the assistance of technical-support personnel. One of the
things technicians might want to know when they attempt to diagnose and correct
your problem is the revision level of your ServSwitch’s ROM. This command causes
the ServSwitch to send the three-character “
xxx ” ROM level to the currently
selected CPU; these characters will be echoed back to the shared monitor if you
are at some type of prompt. To issue the Identify ROM command, press and
release the left Control Key, then type [I].
4.4 Using the RS-232 Port (Optional)
For your convenience, a computer or terminal with an RS-232 serial port can be
connected to the RS-232 serial port on the ServSwitch’s rear panel. This allows you
to send switching commands from a non-local keyboard rather than from the
shared keyboard. You’ll need a twisted-pair serial cable with 6-pin RJ-11 connectors
plus the appropriate adapter: either DB25 female to RJ-11 female (our product
code FA044) or DB9 female to RJ-l 1 female (our product code FA043), depending
on your computer/terminal. Take these steps:
1. Plug one end of the cable into the RS-232 serial port on the ServSwitch’s rear
panel, and the other end of the cable into the RJ-11 female connector on the
appropriate adapter.
CAUTION
Serial cabling in excess of 50 feet (15.2 m) should be routed with
caution. The maximum cable length depends upon the construction of
the cable and its routing. For extended runs, shielded cable should be
used. Avoid routing near fluorescent lights, air-conditioning
compressors, or machines that may create electrical noise. If you
experience a lot of data errors, use shorter cables. The ServSwitch’s
data rate of 9600 bps cannot be changed to alleviate this problem.
2. Connect the adapter to one of the computer’s (or terminal’s) COM ports.
3. Set your computer for serial communication at 9600 bps, no parity, 8 data
bits, and 1 stop bit.
4. To switch the ServSwitch to a different port, type or send the desired port
number followed by
[ENTER]
(a return).
CHAPTER 4: Operation