Comtech EF Data CDD-56X Series Vipersat - Manual (Page 68)

Vipersat Configuration MN/22137, rev 1
3-34 Vipersat CDD-56X Series User Guide
Current WAN Transmit Mode
The Current WAN Transmit Mode item on the menu in figure 3-43 is infor-
mation only and reflects the current transmit status of a unit. In the case of the
CDD-56X, there is no transmit function (no modulator) and this parameter is
not applicable.
Load Switching
The Load Switching command on the menu in figure 3-43 is a toggle Enabling
and Disabling Load Switching on the target Hub CDD-56X. The system will
detect variations in data rate and can be configured to switch from STDMA to
SCPC based on bandwidth requirements.
The initial switch for a Remote Vipersat terminal from STDMA mode to SCPC
mode is determined by the Hub Burst Controller. Once the Remote is switched
into SCPC, any requests to meet additional switching requirements within
SCPC (Step Up or Step Down) are made by the Remote modem.
Entering a B at the command prompt will toggle this feature On or Off for the
target CDD-56X.
Note: Load switching must be Enabled for any Hub CDD-56X burst controller
that will experience changing load conditions in order for the VMS to
dynamically optimize network performance on these circuits.
Application switching by the VMS (Voice and/or Video) is not affected by
this setting. However, using Load switching for real-time applications is
not recommended.
STDMA Slot Capacity
The STDMA Slot Capacity command, shown in figure 3-43, allows setting the
threshold or level of slot capacity at which the Burst Controller sends a switch
request to the VMS to switch the Remote from STDMA mode to SCPC mode.
Enter U at the command prompt to display the dialog shown in figure 3-44.
Figure 3-44 STDMA Slot Capacity prompt
NOTE