User guide

Load Switch Example
F-12 VMS User Guide
Reduced data flow in switched mode (SCPC)
In the event the data flow is reduced, for example a streaming file transfer termi-
nates, the SCPC switched demodulator detects the reduced flow and notifies the
VMS. The VMS will then send a switch command to reduce the size of the
carrier bandwidth to the new calculated bandwidth requirement.
This entire process is automatic following the policies established for the
network. The network is dynamically modified changing its configuration to
automatically respond to changes to the network’s load.
The home threshold is the bit rate set to trigger a return to the home threshold.
This function is used when bandwidth has been allocated to meet load require-
ments, and the load has been either removed or partially removed. Since the
channel’s new load no longer requires the current bit rate, when the bit rate falls
below the preset Home Threshold the channel is switched back to its home
condition, STDMA for example.
Note: The load switching example works exactly the same for the SLM-5650A
modem.
NOTE