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• dsl set loopback lal: Do not issue this command over the RCS to the
far-end 3088RC. If the far-end goes into LAL, the near-end and far-
end 3088RC NTUs can no longer communicate over the RCS.
5.4 SOFTWARE UPGRADE
The Model 3088RC is software upgradeable through the console port.
Software images will be available in Intel Hex Þle format.
The software upgrade feature is available either by powering up the
Model 3088RC with all DIP switches set to the OFF position, or by enter-
ing the system upgrade command on the command line interface. The
software upgrade takes approximately 5 minutes to complete. The
3088RC will print ‘.’ to the screen while the software upgrade is in pro-
cess. When the software upgrade completes, it will print a message stat-
ing that it is complete and the number of errors, if any, that occurred.
Errors may occur during the software upgrade if the image is corrupt or if
there is a disruption in the console port connection. The Model 3088RC
will print a message to the console port if it encounters any errors. In the
event of an error, the portions of the old image may have been overwrit-
ten, and the unit may not be able to boot into operational mode. However,
the unit may still boot into the software upgrade, so a new software
image can still be loaded to bring the unit back to an operational state.
Here is the software upgrade procedure:
1. Remove all cards from the rack except for the card that you intend to
upgrade.
2. Obtain the software image Hex Þle for the 3088RC.
3. Turn off the Model 3088RC.
4. Make a note of the current DIP switch settings, then set all DIP
switches to the OFF position.
5. Turn on the Model 3088RC.
6. ConÞgure HyperTerminal for 19200 bps, 8 bits, 1 stop bit, no parity,
XON-XOFF.
Do not issue this command to a far-end unit. If you were
to do so, the near-end 3088RC would no longer be able
to communicate with the far-end 3088RC.
CAUTION