Comtech EF Data CDD-56X Series Vipersat - Manual (Page 65)

Chapter 3 - Using the Command Line Interface (CLI) 3-31
MN/22137, rev 1 Vipersat Configuration
Figure 3-41 Stats Accumulation Window prompt
Clear
The STDMA statistics can be Cleared (reset) by entering a C at the command
prompt in figure 3-39.
Show Hub Statistics
Entering a W at the command prompt in the STDMA screen displays the
current statistics for the target CDD-56X Hub as shown in figure 3-42.
Figure 3-42 Show Hub Statistics screen
Statistics in the received ACK from each Remote are monitored by the Burst
Controller. These statistics report the fill status of the burst data slot for each
Remote. The Burst Controller builds a table of the group and calculates the rela-
tive data byte count for each Remote. It then calculates the length of the Data
Slot for each Remote based on the Minimum Slot Length plus a percentage of
the Available Bandwidth. Idle Remotes receive a data slot equal to the Mini-
mum Slot Length.
In figure 3-42, Remote 1 with IP address 10.1.128.1 had activity during the
averaging period. It captured 37.8% of the total slot time and had an average
slot length of 283 ms. Remotes 2, 3, and 4 had 41.5%, 18.1% and 7.6% respec-
tively. The dynamic range of STDMA is a function of the difference between
the Nominal Data Length and the Minimum Data Length parameters. These