If we look at our network in busy-hour around 8% of our broadband lines are carrying SIP sessions with average bandwidth usage at that time of around 10k. You could draw the conclusion from this that approaching one in ten of our business customers are experimenting with VOIP in some form however the very low average usage would indicate that they are not using more than one voice channel and even then not very heavily.
If 8% of a broadband base carrying business-voice traffic seems high then remember that Griffin has become the ISP of choice for VOIP and IPCentrex, interconnecting directly with all the leading suppliers. Other ISPs may have a far lower percentage of their business broadband customers attempting to use broadband for voice."