Cables to Go CDM-570L manual ToS Switching Parameters, Scpc Step Delay, Scpc Step Up Excess

Vipersat Configuration

The SCPC Step Down Threshold establishes the percentage of bandwidth use that will trigger a switch down from the present SCPC rate to a lower rate to ensure efficient bandwidth usage.

Typically the default value will be optimum, but if a different threshold is desired, an alternate value can be specified by entering D at the command prompt in figure 3-34.Note that this value must be less than the value specified for the SCPC Step Up Threshold.

SCPC Step Delay

This menu item appears for the Remote modem only.

The SCPC Step Delay feature provides a switching delay period to ensure that a premature switch up or down in the SCPC rate does not occur due to a tempo- rary rise or fall in traffic.

A default value (in seconds) is provided, but this parameter can be modified by entering W at the command prompt in figure 3-34.

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 figure 3-34.

ToS Switching Parameters

This menu item appears for the Remote modem only.

When ToS switching is enabled on a CDM-570/570L, the parameters for ToS switching must be defined by entering P from the STDMA/SCPC Auto Switch- ing screen (see figure 3-34). The TOS Switching Control menu shown in figure 3-41is displayed, allowing parameter entry for the desired ToS service to be applied.

3-32 Vipersat CDM-570/570L User Guide