Comtech EF Data CDM-570/570L Vipersat - Manual (Page 79)

Chapter 3 - Using the Command Line Interface (CLI) 3-43
Vipersat Configuration
The SCPC Step Down Delay feature provides a switching delay period to
ensure that a premature switch down in the SCPC rate does not occur due to a
temporary fall in traffic.
A default value (60 seconds) is provided, but this parameter can be modified by
entering V at the command prompt in the Auto Switching screen to display the
dialog shown in figure 3-53.
Figure 3-54 SCPC Step Down Delay prompt
SCPC Step Up Excess
This menu item appears for Remote modems 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 value (10%) is provided, but this parameter can be modified by enter-
ing E at the command prompt in the Auto Switching screen to display the
dialog shown in figure 3-55.
Figure 3-55 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