Cables to Go CDM-570 manual Percent Allocation, Scpc Step Up Threshold, Scpc Step Down Threshold

Vipersat Configuration

Figure 3-39STDMA 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 3-33to display the screen shown in figure 3-40.

Figure 3-40Percent 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.

Chapter 3 - Using the Command Line Interface (CLI) 3-31