FCC Chairman Michael K. Powell issued a public statement warning SBC Communications against imposing traditional tariff access charges on VoIP providers or to discriminate against its VoIP competitors. The statement was issued in response to SBC's new interstate connectivity service, known as TIPToP. TIPToP is a new SBC service that gives VOIP providers the capability to connect traffic to PSTN based voice services. Specifically, TIPToP provides switch port interfaces, which enable trunk groups, transport, SS7 Initial Setup (ISUP), and SS7 Transaction...