Percent Allocation; Scpc Step Up Threshold; Scpc Step Down Threshold - Comtech EF Data Vipersat CDM-570 User Manual

V i p e r s a t C o n f i g u r a t io n
Figure 3-39
STDMA Switch Delay prompt

Percent Allocation

The Percent Allocation menu item allows adding a fixed percentage to the
channel bandwidth request to accommodate additional bandwidth requirements
which may occur after the switch is made from STDMA to SCPC mode.
Typically the default value will be optimum, but if there may be a larger band-
width requirement after the switch, the percent allocation value can be
increased. In choosing a value for this allocation, future bandwidth require-
ments for the channel must be balanced against efficient bandwidth utilization.
To change this setting, enter E at the command prompt in figure 3-33 to display
the screen shown in figure 3-40.
Figure 3-40
Percent Allocation prompt

SCPC Step Up Threshold

This menu item appears for the Remote modem only.
The SCPC Step Up Threshold establishes the percentage of bandwidth use
that will trigger a switch up from the present SCPC rate to a higher rate to
ensure that there is sufficient bandwidth available for current conditions.
Typically the default value will be optimum, but if a different threshold is
desired, an alternate value can be specified by entering U at the command
prompt in figure 3-34. Note that this value must be greater than the value speci-
fied for the SCPC Step Down Threshold.

SCPC Step Down Threshold

This menu item appears for the Remote modem only.
C h ap t e r U s i n g t h e C o m m a n d L i n e I n t e r f a c e ( C L I )
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