Once a VoIP call is transferred to the PSTN how do IXC's and local telephone companies determine if

Once a VoIP call is transferred to the PSTN how do IXC's and local telephone companies determine if

Once a VoIP call is transferred to the PSTN how do IXC's and local telephone companies determine if there are any terminating charges that need to be applied?

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A service provider typically partners with other service providers or partners with a clearinghouse provider which develops partnerships with other service providers for them. These partnerships allow a service provider to expand their reach and provide more points of access to the PSTN. Service providers negotiate contracts with each other and determine a rate to charge one another based upon the number of minutes of network usage. When a call connects through a service provider's network a billing system within that provider's network keeps track of the call duration. Service providers reconcile the number of calls (minutes) connected through their networks and bill each other appropriately.

This was first published in March 2004