The traditional network architecture often causes network interruption during the session process, which cannot provide sufficient security. The existing system cannot acquire and assemble the call record, and the telephone terminal cannot timely and reliably query the employee’s call record. An IMS telephone call sorting method based on the reliable routing protocol of the anchor node is proposed. The traffic capture module performs port mirroring on the captured traffic and parses the SIP protocol data. The current IP packet of the traffic passes the predicted link lifetime. The existence of candidate relay nodes to identify more reliable links for forwarding, to reduce the frequency of data loss, and improve the administrative efficiency of employees. The optimized routing algorithm RRCP proposed in this paper is compared with the traditional GRP algorithm. The network communication model is built by network simulation technology. The number of faults, packet loss rate, data delivery delay and average hop of the route optimization protocol are analyzed and verified. The number shows better performance.