Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 348)

VMS Service Managers MN/22156, rev 12
6-42 VMS User Guide
To Post a new Exclusion zone, the following information is required:
• VMS Host address and Port (IP address and port 8081).
• An Exclusion identifier (a unique integer value, starting at 1), used to
control—query or delete—the Exclusion zone.
• The Satellite identifier – a unique number for the satellite defined in the
registry key.
• The Base and Top frequencies (in Hz) for the zone.
Once an Exclusion zone has been posted, the VMS will move any dynamic
carriers that are currently occupying slots in that zone either to bandwidth in
available pools or, if no additional bandwidth can be allocated, home to the
ECM channel.
Caution should be exercised when implementing these zones to avoid undesir-
able disruptions to important carriers that are presently occupying this band-
width.
The operator should allow at least a ten minute window prior to setting up the
external carrier(s) to ensure that the zone bandwidth has been cleared. This will
accomodate a possible communications failure with the Remote associated with
the dynamic carrier, requiring the VMS to use the auto home state mechanism to
free up the bandwidth slot.
The operator can confirm this process with a Status query. The response will be
either “free”, indicating the bandwidth has been cleared, or “occupied”, indicat-
ing the VMS is still in the process of clearing the bandwidth.
An alternative method of creating Exclusion zones is by manually declaring
them with the VMS RF Manager. Zones can be directly entered in the Space
Segment Exclusions dialog of the Satellite Properties window, as shown in
figure 6-52.