Allocation Method; Figure 3-13 Stdma Page (Remote) - Comtech EF Data Vipersat SLM-5650A User Manual

V i p e r s a t C o nf i g u r a t i o n
For comparison, the STDMA menu for an SLM-5650A operating as a Remote
unit is shown in figure 3-13. Note that the configuration items for the Remote
screen are a small subset of those for a Hub.

Allocation Method

This parameter field is only displayed if the SLM-5650A is being used as a Hub
in the network, and provides the functionality for the STDMA Burst Controller.
Vipersat STDMA has five modes of operation:
• Fixed — all Remotes get the same data slot time (slot size) in the cycle,
• Dynamic Slot — data slot time of Remotes vary according to activity,
• Dynamic Cycle — slot time and cycle time vary according to activity of
• GIR (Guaranteed Information Rate) — each Remote always has at least
• Entry Channel — Remotes run in SCPC mode, but STDMA is used for
The Hub can be configured to operate in one of the five modes by selecting the
Allocation Method from the pull-down menu, as shown in figure 3-14.
3-14
Figure 3-13
regardless of activity. Cycle time is fixed also.
cycle time does not.
Remotes.
the minimum data slot size when needed, and cycle time is variable up to a
maximum of one second.
maintenance and control channel.
STDMA Page (Remote)
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