This invention relation attaching information of connection processing in order to do the modification processing ahead connecting which responds to the classification of telephone number and telephone number connected processing information storage section 123 referring to the connected processing information storage section 123 which it accumulates and, according to the telephone number which turns a dial, modifies the telephone number which turns a dial, or the telephone number identification section 121 which acquires the information of connection processing and, according to the information of the connection processing which is acquired, has with the connected modification section 124 which modifies ahead connecting in IP oversize. Because of this, telephone call it responds first VoIP service in the communication environment which is available, selects appropriate ones from midst of the group of common carriers and the service provider, it is possible to assure the decrease of communication fee.
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