The invention discloses a phonetic gateway that is fitted with digital signal processor and IP call controlling module connected with IP network, and a receiving-transmitting interface connected to the said signal processor and IP calling control module and used for start in signaling-free manner and receiving and transmitting audio frequency data. It also discloses a method for phonetic gateway constituting exclusive link, including sending out phonetic call to call-in equipment related to the phone number through IP network, and acting the receiving interface after getting the link messages from call-in equipment. When phonetic gateway is in being called side, it will start the relative receiving interface after receiving the phonetic call from call-in equipment and return the link message to call-out equipment. The invention can constitute the exclusive link among phonetic gateway without signaling and backup the exclusive operation. |