Scpc Step Up Excess; Keep Alive Timer For Carrier Inhibit - 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 3-44
SCPC Step Delay prompt

SCPC Step Up Excess

This menu item appears for the Remote modem only.
During each SCPC Step Up switch, the excess capacity data rate value entered
by this command is added to the new SCPC data rate. This excess is added each
time an SCPC Step Up switch occurs. This setting makes additional bandwidth
available for when the demand arises while minimizing Step Up switching
events.
A default percentage value is provided, but this parameter can be modified by
entering E at the command prompt in the Auto Switching screen to display the
dialog shown in figure 3-45.
Figure 3-45 SCPC Step Up Excess prompt

Keep Alive Timer for Carrier Inhibit

This menu item appears for Hub modems only.
The Keep Alive Timer for Carrier Inhibit parameter provides a fixed setting
that can be specified for the keep alive message sent to the Remotes from the
Hub. This provides an alternate to the burst map which is variable and may
become excessively long in certain applications. An example of this is a burst
map containing a large number (up to 100) of remotes running in ECM mode
where the burst period exceeds the Remote carrier inhibit timer.
When implemented, this parameter is set at either the TDM outbound unit or a
switched demod, not at the STDMA Controller, in order to prevent a problem
should the burst controller be rebooted.
C h ap t e r U s i n g t h e C o m m a n d L in e I n t e r f a c e ( C L I )
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