A system and method of bypassing the regulated portion of the Public Switching Telephone Network (PSTN) to establish carrier-grade voice transmissions and/or IP data communications between an Internet Calling Person having a first telephone and a first PC coupled to a first Local Service Access Provider...http://www.google.com.au/patents/US6973091?utm_source=gb-gplus-sharePatent US6973091 - Enabling quality voice communications from web page call control
