Comtech EF Data VMS v3.12.x Vipersat - Manual (Page 168)

Network Manager Configuration MN/22156, rev 12
3-68 VMS User Guide
• Available Bandwidth — currently unreserved and available for pre-
allocation to Remote sites. This segment is displayed as a numerical
frequency value, and is represented as the light green section
(combined) of the bandwidth color bar. The largest continuous/
unfragmented block of available bandwidth is represented by the light
green section that is not underlined with dark green.
• Fragmented Bandwidth — additional available bandwidth remaining
that is separate from the largest continuous block. This segment is
displayed as a numerical frequency value, and is represented as the light
green section of the bandwidth color bar that is underlined with dark
green.
The divisions shown in the color bar will vary depending on a number of
factors, including the quantity and size(s) of the bandwidth pool(s), and the
amount of pre-allocated bandwidth.
When Site reservations are assigned for both Tx and Rx (Point-to-Point), the
first listing for a Remote represents the Tx bandwidth and the second listing
is the Rx bandwidth.
From this window, individual reservations can be enabled/disabled via the
check box in the Identity column. Reservation settings (Data Rate,
Bandwidth, and Extra) can be edited by double-clicking on a table entry.
Note that the Satellite Reservations window can be left open to assist the
user/operator in the reservation assignment process for other Remotes.
10. Continue to select Remotes as required and configure them for guaranteed
bandwidth until either all resources are exhausted or network requirements
are achieved.
11. To remove a bandwidth reservation for a Remote, click to uncheck the sat-
ellite check box in the site Reservations page, then click Apply.
Hub Allocatable Modulator & Demodulator Compatibility
Compatibility issues with allocatable mods and demods at the Hub may arise
when implementing the Guaranteed Bandwidth feature in networks that include
multiple modem types. When combining modem types, careful network design
is essential to ensure that a compatible Hub mod/demod is available for estab-
lishing an SCPC link with a Remote. The following factors must be considered:
• Transmission Rate — The device must be capable of handling the data
rate that will be allocated between the Remote and the Hub (e.g., SLM-
5650A versus CDM-570/L or CDD-56X).