Device for controlling a cs domain subscriber terminal access to an ims communication network services

The invention relates to for pilot is a apparatus for IMS network managing service CS call MSC center's mobile network terminal for accessing comprising a user CS domain and commands. The device comprises: i), GMSC managing terminal to CS domain the communication of terminal, alower) is MGCF module, a defer to the government protocol message from CS domain converting flowing to transmit the S-CSCF module according to an SIP protocol, a vice; versaIII) is I-CSCF module, causing connected to CS territory's terminal to the register of S-CSCF module; And iv) is P-CSCF simulator and user agent, for) is behalf of the terminal cooperation interface for I-CSCF module causing the terminal to IMS networks registration of S-CSCF module which user orders, b), wherein the user attempt a call by terminal, and said calling wherein registration with the MGCF module sends wherein the S-CSCF module, and c), from user wherein the earphone S-CSCF module of IMS network received with a terminal to the support of communication, wherein the MGCF module fault the GMSC module an CS domain side is provided.