Method and system for interfacing between radio access station and access control router

An interfacing method between a radio access station and an access control router and an interfacing system using the same are provided to prevent various kinds of troubles by defining an interface procedure to receive and transmit a call signal between an RAS(Radio Access Control) and an ACR(Access Control Router). A PSS(Personal Subscriber Station)(100) transmits a service request call signal to a plurality of RASs(102,106). An RAS-ACR reference point is generated to confirm operating states between the plurality of RASs and a plurality of ACRs(104,108) and to grasp generation of troubles in a process for providing a portable Internet service. An RAS-ACR reference point is generated to confirm operating states between the plurality of ACRs and to grasp generation of troubles in the process for providing the portable Internet service.