Patent ID: 6870827
Filing Date: 2005-03-22
Classification: H04L,H04M,H04Q

Abstract:
1. A method for providing voice communication between stations at two remote locations that are each linked to public switched telephone networks (PSTNs) comprising the steps of: in response to placement of a voice telephone call to a PSTN by a first one of said stations, determining quality of service of a public data packet network; comparing the quality of service obtained in said determining step with a predetermined threshold level for said voice telephone call; in response to a result in said comparing step that said predetermined threshold level is exceeded, routing said voice telephone cal to a second one of said stations through said public data packet network in packet data format; and if said on determined threshold level is not exceeded, automatically routing said voice telephone cal in a manner that is undetectable to a caller to said second station through an interexchange carrier switched voice network in PSTN network protocol, wherein the PSTN of the calling station is an advanced intelligent network (AIN) that includes an integrated services control point (ISCP) having stored therein subscriber call processing records (CPRs).