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D-2 Vipersat CDM-570/570L User Guide
Since there is no way to guarantee all Remote sites will be online during the
initial upgrade to v1.5.3, Vipersat is providing this migration procedure and util-
ity to facilitate picking up new or offline units. This migration tool includes
non-saved control parameters at Hub units only that allow the operator to select
compatibility mode with v1.5.2 (or earlier) firmware. When the operator
initiates this backwards compatibility migration control, communications with
all Remote units at the newly upgraded version 1.5.3 will be lost during that
time. However, when the migration parameter is set in the TDM outbound and
the appropriate Burst Controller(s), communications with v1.5.2 (or earlier)
straggler/offline Remotes will be restored. At this point they can be upgraded to
v1.5.3, restoring total network wide communications.
This will represent a network outage to all Remotes connected to the TDM
outbound. In networks with a DVB outbound, only those Remotes associated
(grouped) with the Burst Controller set to v1.5.2 compatibility will lose commu-
nications.
Great care should be exercised in following these steps as outlined in this docu-
ment. It is important to remember that network communications will not be
effected until the units are rebooted to v1.5.3 router code. The last section of
this document addresses recovering stragglers/offline remotes.