Time measurements in a transmission path

摘要: In a voice packet switching network (10), following call path set-up, continuity packets (500a-c) are transmitted between the originating (100) and destination (101) nodes to check continuity. The carry time stamps of their (503) preceding packet's (504) transmission, permit determination transit delay, computation asynchrony clocks (200) two nodes. A is considered acceptable if one half round trip delay does not exceed predetermined maximum delay. Subsequently data discarded exceeds Transit computed from terminating node clock readings at transmission reception packet, respectively, adjusted for clocks.