Cisco DNCS System Release 2.8.1 3.8.1 4.3.1 User Guide

Under normal circumstances, persistent database records should not be cleared. Clearing these causes DHCTs to
disconnect from the QPSK modulator. Until the DHCTs sign back on, a process that may take hours, subscribers
will be unable to use interactive services, such as VOD.

There are, however, some situations when it is necessary to clear and reset the QPSK the database, for example,
if you need to reallocate the IP addresses of DHCTs. In other situations, it can be helpful to clear and reset the
QPSK database, for example, when moving some DHCTs from one QPSK modulator to another. This page
describes how to use the Reset and Clear DB selection on the QPSK File menu to reset and clear the QPSK
persistent database.

Selecting this menu option clears the persistent database records for all associated DHCT IP addresses. All
package and billing information remains intact and the persistent database function is maintained for future QPSK
modulator resets.

During this process no DHCTs for the QPSK modulator are rebooted. As a result, you can perform this procedure
at any time. However, interactive services will be unavailable to subscribers until the DHCTs on the corresponding
QPSK sign back on, a process that can take from a few minutes to a few hours, depending on several factors. For
this reason, you may prefer to clear the database records during a maintenance period.