Comtech EF Data CDD-56X Series Vipersat - Manual (Page 55)

Chapter 3 - Using the Command Line Interface (CLI) 3-21
MN/22137, rev 1 Vipersat Configuration
This parameter defines the number of time slots per cycle available for assign-
ment to the Remotes in queue that are to be switched from ECM into dSCPC.
These are the Remotes that are tagged for Online mode. By design, ECM works
on a contention basis, with the number of slots being some fraction of the total
number of Remotes. In order for this ratio to be optimized, a Vipersat calculator
is available to determine this setting.
Tip: Contact a Comtech Vipersat Networks representative for a copy of the
latest Vipersat ECM Calculator.
Entering R at the command prompt allows changing the slot count.
Valid range is 1 to 255.
Figure 3-22 Total Slot Count prompt
Slot Cycle Length
This menu item is for information only and displays the Slot Cycle Length in
milliseconds and bytes for the remotes in the group. This value represents the
total amount of time—preamble, data length, and guardband—allocated to the
Remote terminal during one spin cycle.
Slot Start in Cycle
This menu item appears in the STDMA screen when the Unit Role is Remote;
however, it is not relevant since a Remote configuration does not enable
STDMA.
Set Remotes
This menu item appears in the STDMA screen when the Unit Role is Hub with
No Expansion, except for Hub Type ECMv2.
Entering an R at the command prompt displays the STDMA Remotes Menu as
shown in figure 3-23. This screen is used to define and make modifications to
the Remotes that belong to the STDMA group for the Hub burst controller, as
well as to display the burst map status information for each Remote.