User guide

Appendix F - Automatic Switching F-13

Application switching

Application switching, diagramed in figure F-6, also is capable of changing

bandwidth used, but the change is determined entirely by the type of application

being requested ignoring load requirements.

Figure F-6

Application switching diagram, CDM-570/570L

Note: Application switching is not available for SLM-5650A modems. The

following application switching section refers to CDM-570/570L modems.

In a system configured for application switching, the remote site modem/router

looks for a packet in the data stream coming from the LAN that is configured

using the H.323 stack protocol and contains an H.225 signaling protocol. In the

illustration shown in Figure F-6 the signal is a call initiated at the remote site.

The packet is then examined to determine the port number then, from the allo-

cated port ranges, determines the type of application being sent.