52
SERVSWITCH™ ULTRA
4. Use the terminal program’s “send text file” or “upload” function to send the
new firmware file to the Switch, using the same protocol you would to send an
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 Ultra 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.