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    • 60. 发明授权
    • System and method for maintaining a communication session over gatekeeper failure
    • 维护关守关机通信会话的系统和方法
    • US06973027B1
    • 2005-12-06
    • US09932544
    • 2001-08-17
    • Shmuel ShafferShantanu Sarkar
    • Shmuel ShafferShantanu Sarkar
    • H04J1/16H04L29/06H04L29/14H04M7/00
    • H04L29/06027H04L65/1009H04L65/1043H04L69/40H04M7/0084
    • The present invention provides a method for maintaining a communication session between telephony devices, which includes establishing a first TCP/IP signaling communication link between a first telephony device and a proxy. The first TCP/IP signaling communication link is operable to communicate first keep alive signals between the proxy and the first telephony device. A second TCP/IP signaling communication link is established between a primary gatekeeper and the proxy. The second TCP/IP signaling communication link is operable to communicate second keep alive signals between the proxy and the primary gatekeeper. The first and second TCP/IP signaling communication links are terminated at the proxy. Therefore, a communication session between the first telephony device and a second telephony device may be maintained even if the second keep alive signals are interrupted.
    • 本发明提供了一种用于维护电话设备之间的通信会话的方法,其包括在第一电话设备和代理之间建立第一TCP / IP信令通信链路。 第一TCP / IP信令通信链路可操作以在代理和第一电话设备之间首先通信保持活动信号。 在主要关守和代理之间建立第二个TCP / IP信令通信链路。 第二TCP / IP信令通信链路可操作以在代理和主网守之间传送第二保持活动信号。 第一和第二TCP / IP信令通信链路在代理端被终止。 因此,即使第二保持信号被中断,也可以维持第一电话设备和第二电话设备之间的通信会话。