Abstract: A system which includes a personal computer or a server adapted to be connected by way of a radio link to one or more wireless interface devices. Each of the wireless interface devices is configured to support multimedia applications and may include a speaker, as well as a microphone, for audio input. Audio input data is compressed and transmitted over a radio link to a remote computer or server.

Abstract: A voice gateway is used to transmit voice signals through the Internet. Upon receiving a connection request, the gateway calculates an end-to-end delay time and selects a proper route according to the calculated delay time to improve the quality of voice transmission. A gateway (10) on the caller side multicasts a connection request to gateways (20) on the receiver side. Each of the receiver gateways returns a response to the caller gateway. According to the response, the caller gateway calculates a compression/decompression allowance and selects a route that employs a compression rule whose compression or decompression time is shorter than the compression/decompression allowance.