| By extending the CorNet-IP protocol to include the EFC protocol variant (EFC: Extended Fast Connect), the feature "IP/IP e2e payload via enterprise proxy" is enabled for connecting IP telephones/clients to the ITSP. Due to "IP/IP e2e payload via enterprise proxy", the IP packets no longer have to be processed by the DSP of the HG 1500 (DSP: Digital Signal Processor). This means that none of the HG 1500's gateway channels are used, and the maximum number of simultaneous calls only depends on the codec used and the available bandwidth of the DSL port.
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