Cisco Cisco D9800 Network Transport Receiver 전단

This document describes how to boot a Cisco D9800 receiver into Safe App mode. There may
be occasions where front panel access to the menu system is not available. This may be due to a
corrupt app code, or an instance where the Cisco receiver remains in boot mode.

The most common approach is to power cycle the receiver to see if the menu system returns upon
booting.

If power cycling the receiver does not result in restoration of the menu system, then another
approach would be to attempt a safe app (application) boot.

If the current app is suspected to be faulty, it may be possible to boot the Cisco D9800 (D9800,
D9854, D9859) receiver into its safe app version. This technique is only possible if the receiver
has more than one app version installed, and the current app version is faulty. The original app
version shipped with the receiver is known as the safe app version, or the version which you may
always revert to if there are problems with updated versions of the current app code.

These steps describe the procedure to enter the Safe App boot.

Disconnect the power cable from the Cisco receiver

1.

Press and hold the front panel 'SELECT' button

2.

Attach the power cable to the receiver

3.

Wait for the front panel message indicating 'Launching vx.xx' where x.xx is the safe app
version. A series of dots should follow

4.

Release the button.

5.

When the series of dots are completed across the screen, the receiver should continue to boot into
the safe app version.

At this point, you should be able to recover the menu system and confirm the current app version.
The display will show the safe app version.

It ise advisable to delete/erase the suspected faulty app code version and re-install/upgrade the
receiver to the latest app code.

Note: If the series of dots appear to stop before reaching the end, the Cisco D9800 receiver