Voice networking service method based on SIP (Session Initiation Protocol)

The invention discloses a voice networking service method based on an SIP (Session Initiation Protocol), and belongs to the technical field of multimedia voice communication. According to the method, firstly, a DNS module, an NMS module and a VRS module are constructed, a communication protocol between the NMS module and an external voice scheduling platform adopts an SIP protocol, a communication protocol between the DNS module, the NMS module and the VRS module adopts a TCP protocol, a protocol adopted for communication between the NMS modules is the TCP protocol, and the voice scheduling platform is used for accessing a user terminal and being connected with the user terminal through the SIP protocol. The SIP module is connected with the NMS module through an SIP protocol; on the premise that a calling user calls a called user in a network, platform addressing is completed by the DNS module, and a voice scheduling platform is indicated to establish a call connection between the calling user and the called