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CHAPTER 4: Operation: Hardware and Keyboard Commands
ASCII text file (not XMODEM, ZMODEM, etc.). The Switch will send back a
series of ASCII period (“.”) characters (decimal 46, hex 2E) that shows the
progress of the file-copying procedure. It will also flash LED 1 or 4
(depending on the data rate). Once the file transfer is complete, the Switch
should light LED 2 and send the message:
Receive successful
Hit space to program
If something goes wrong during this process, you might receive any of these
messages instead:
Checksum error or Record error or Data error
Receive failed
Try again Y/N?
These messages are usually caused by one of these problems:
• The RS-232 cable or adapter is loose, too long, defective, or incorrectly
pinned;
• The terminal emulator’s setting for the serial port, data rate, data format,
and/or file-transfer protocol is wrong; or
• Either the PC’s serial port or the Switch’s RS-232 port is defective.
To try again, press “Y” on the PC’s keyboard; the ServSwitch goes back to
step 1 and sends “Waiting for file...”. To abort, press “N” on the PC’s
keyboard; the Switch skips ahead to the “Hit enter to boot” message
shown in step 5, but the firmware will remain unchanged. If the trouble
recurs and you can’t pinpoint it, call Black Box for technical support.
5. If the file transfer is successful, press the space bar on the PC’s keyboard.
LED 2 will go dark briefly while the ServSwitch begins reprogramming its
flash memory with the new firmware. It should send the message:
Programming flash
This will be followed by another series of ASCII periods that shows the
progress of the flash-reprogramming procedure. If this phase is successfully
completed, the Switch will begin verifying the new firmware; it will send the
message:
Verifying flash
This will be followed by a third series of progress-indicating ASCII periods. If
verification is successful, the Switch will light LED 3 and send the message:
Verify successful
Hit enter to boot
If you get an error message at any time during the programming or verifying
phase, call Black Box for technical support.