User guide

Chapter 3 - Using the Command Line Interface (CLI) 3-41
Vipersat Configuration
Figure 3-51 ToS View screen
Hitless Switching Parameters
Unless inherent delays in configuring both ends of a satellite bandwidth link
during dynamic switching are accounted for, transmitted data may be lost
during the transition. The time for a switch command to be sent across the satel-
lite link (~ 250 ms), the command processing time, as well as receiver acquisi-
tion time must be considered. The Vipersat Hitless Switching feature provides
a means to coordinate timing and utilize buffering to eliminate these data
outages.
To access the Hitless Switching screen, enter H from the STDMA/SCPC Auto
Switching screen (see figure 3-35).
Figure 3-52 Hitless Switching screen
This screen will initially display all lock times as -1, indicating that Hitless
Switching is currently disabled. To enable the Hitless Switching feature, enter R
at the command prompt to restore default lock times.
Delay for Mod
This parameter allows the operator to insert additional delay to buffer more data
after modulator transmission is ceased. Enter M to modify this parameter.