Cablevision unveiled direct-dial intl calling for its "Optimum Voice" VoIP service at rates it claims are 25% less than leading providers. To activate overseas service, subs need only logon to optimumvoice.com and register with a minimum credit card payment of $10. Since the switch was flipped almost 1 year ago (Cfax 9/29/03), CVC has signed 115K VoIP subs, averaging 3,400 new customers/week. — How hot is cable telephony? SCTE and our sister pub Communications Technology’s "Advanced VoIP Deployment Symposium" in Philly today sold out.