Dan Ryan has a very intelligent and coherent analysis of the whole Tip Top issue. “Many comments miss the essential point that this is really just a haggle over price between interconnecting services,” he writes, “After all, VoIP carriers pay for access to SBC’s network already. SBC’s gripe is that they pay less than carriers offering traditional service over the PSTN. What SBC has tariffed isn’t anything novel.” This is a plain-english explaination of the issue, in case you are interested.