Patent ID: 7161949

Claim:
A method of initiating a call between users with reduced call set-up times using one or more 3G telecommunication networks, the method being provided between at least a pair of H.324-like devices coupled to the one or more 3G telecommunication networks, the method comprising: transmitting a call signaling message from a first device to a second device through a telecommunication network to initiate a call; establishing a bearer channel between the first device and the second device once the call signaling message has been received by the second device; determining a mobile level for operation; and performing two or more transmitting processes within a round trip cycle time using the first device, wherein the two or more transmitting processes include at least a first SRP frame characterized by a first content and associated with a first acknowledgement and at least a second SRP frame characterized by a second content and associated with a second acknowledgement, the two or more transmitting processes comprising: transmitting the first SRP frame from the first device to the second device through the bearer channel; and transmitting the second SRP frame from the first device to the second device through the bearer channel prior to receiving the first acknowledgment from the second device in response to the first SRP frame.