Abstract: A system for carrying out voice interception for Video Phone (VP) services in a Wideband Code Division Multiple Access (WCDMA) network. The system receives an interception request to perform interception on a target and interception related information from a Law Enforcement Agency (LEA), processes communication traffic of the intercept target to obtain audio data from the communication traffic, converts the audio data into a format that is supported by the LEA, and delivers the audio data to the LEA.

Abstract: A data transmission system and method, including the steps of: a calling media gateway receiving message packets transmitted by a calling ISDN terminal through a plurality of calling circuits, and converting the message packets into data packets suitable for being transmitted through a single IP bearer link; the calling media gateway transmitting the data packets to a called media gateway through one IP bearer link; and the called media gateway parsing the data packets, and transmitting the parsed data packets to a called ISDN terminal through a plurality of called circuits. In the present invention, there is only one IP link between the two media gateways, and the delay is fixed when data of a plurality of links are passed across an IP network, therefore it is possible for the an multi-link ISDN call to avoid a data asynchrony due to inconsistencies of a plurality of IP link routes.