METHOD FOR THE SYNCHRONIZATION OF MEDIA GATEWAYS ON AN IP NETWORK

摘要

A method of providing synchronization of the clocks of all of the media gateways of an Ethernet, or equivalent, IP network used in the transmission of audio data between media gateways using a clock provided by the PSTN. The selection of one of the media gateways connected to the PSTN, termed the master CoHub (Central Office Hub), is used as a clock master. This CoHub derives its clock from its TDM-interface's frame- synchronization with the PSTN to which it is connected. Utilizing this gateway- synchronization method, all MG' s are synchronized to this PSTN clock-source.