User`s guide

Performing Diagnostics 11 - 7
Downloading Using Xmodem Protocol (Xmodem/Crc-xmodem)
Use the Xmodem or CRC-xmodem options to load the new firmware ver-
sion through the Console Port.
Depending on the communications software programs available, choose:
n Xmodem: Terminates packets with a “checksum”
n CRC-xmodem: Terminates packets with a Cyclic Redundancy
Check (CRC).
è To load firmware using Xmodem or CRC-xmodem:
1. Connect a terminal to the Console Port using a communications
software program (Procomm
TM
or Windows
TM
Terminal).
2. Select either the Xmodem option or CRC-xmodem option, depending
on your communications software.
The following message appears:
Ready for XMODEM download. Use several ^XÕs to cancel
3. Set the communication program to initiate the file transfer to the
unit.
4. The unit begins the file download. A message similar to the follow-
ing appears:
XMODEM: received 160450 bytes in 00:03:36; 800 bytes/s
transfer rate
After the loaded code for the new firmware is validated, the flash mem-
ory is programmed and the unit will restart with the new code.
The firmware consists of the boot block and the application code. Dur-
ing the firmware download, the application code is replaced, but the boot
block is not.
UCE.BK Page 7 Wednesday, February 10, 1999 12:10 PM