User guide

Chapter 3 - Using the Command Line Interface (CLI) 3-27
Vipersat Configuration
STDMA/SCPC Automatic Switching
One of the most powerful features of the Vipersat CDM-570/570L is the capa-
bility to perform Automatic switching between STDMA mode and SCPC mode
based on bandwidth demand. The configuration options that are available to
meet customer-specific requirements are extensive, and include switching based
on Load, Application (Voice and Video RTP), ToS, and QoS.
For additional information, refer to Appendix B, “Automatic Switching,” in this
document.
Note: Care must be taken when configuring the Auto Switching features of the
Vipersat system to ensure that there is no duplication or overlap of
switching functions between Application, ToS, and QoS for a particular
traffic flow. Only one of these switching methods should be utilized for
any one flow requirement.
The functions available for configuring the switching operations depend on
whether the target CDM-570/570L is a Hub unit or if it is a Remote unit. Note
that Automatic switching does not apply to either a Hub with Expansion or a
Remote with Expansion; these configurations operate in dedicated SCPC mode
and all switching control is performed by the VMS. As is shown in table 2-2,
Auto Switching should be Disabled for these two configurations.
In order for the target CDM-570/570L to be automatically switched between
STDMA and SCPC modes, the Auto Switching feature must be Enabled as
described in the section “Feature Configuration” on page 3-5.
Selecting Automatic Switching from the Vipersat Configuration screen
shown in figure 3-6 (enter A) will display the STDMA/SCPC Auto Switching
screen shown in either figure 3-34 (Hub modem) or figure 3-35 (Remote
modem).
Figure 3-34 STDMA/SCPC Auto Switching screen (Hub)
NOTE