Comtech EF Data CDM-570/L Vipersat Parameter Editor - Manual (Page 57)

Chapter 2 - Using Parameter Editor 2-41
Vipersat
Figure 2-28 Application Switch Detection, Remote Unit
In a system configured for application switching, the remote site CDM-570/
570L looks for a packet in the data stream coming from the LAN that is config-
ured using the H.323 stack protocol and contains an H.225 signaling protocol.
VMS also recognizes and supports SIP signaling.
The packet is first examined to determine the port number, then, from the allo-
cated port ranges, determines the type of application being sent.
The CDM-570/570L sends a switch request to the VMS requesting a carrier for
the application type.
Each application type will have been assigned a bandwidth allocation when the
policy for the remote site is established. A voice application, for example might
have had the bandwidth set in the policy to handle three simultaneous voice
connections. When a VoIP protocol is detected in the H.225 signaling protocol,
the CDM-570/570L requests the VMS to switch the bandwidth to accommodate
three voice circuits.
The same process applies if the protocol detected is Video.
When both VoIP and Video are requested, the bandwidth required for the Video
is used and the VoIP, which has priority, shares the SCPC with the Video.