Patent ID: 7505481

Claim:
A system for accessing and transmitting different data frames in a digital transmission network, comprising: at least a user-network interface (UNI) from plurality of UNIs, which is used to couple with a user's network; and/or at least a network-network interface (NNI) from plurality of NNIs, which is used to couple with said digital transmission network to transfer data; and a data converting device, which is coupled with said UNIs and said NNIs to convert data formats between said UNIs, data formats between said NNIs, or data formats between said NNIs and said UNIs; said data converting device comprises a virtual interface device, said virtual interface device comprises: at least two device interfaces which comprises UNIs or NNIs, for inputting or outputting data frames; a virtual interface processing unit, which couples with said device interfaces to process said data frames and exchange said data frames between said virtual interface processing unit and corresponding device interfaces; a rule database, which couples with said virtual interface processing unit and stores rules corresponding to different data frames, said virtual interface processing unit determines a processing flow according to the classification of data frames under said rules; a control interface unit, which couples with said rule database and said virtual interface processing unit to control said rule database and said virtual interface processing unit; an inter-device interface, which couples with said virtual interface processing unit to couple with external devices to exchange data, wherein a corresponding relationship between said device interfaces and said rules is 1:N, N being a natural number greater than 1, and each device interface is configured as a device interface meeting a requirement of the data interface corresponding to any of the rules.