----- Original Message ----- thanks Neil, tony I really would like to know how the upstream backbone works. I'm wondering how you can be a high speed internet service provider, supplying people with 2Mbps and be supplied with T1 lines, it seems like you would need one for each customer, and that doesn't make sense. And a good list is what I need, if anyone knows of one. I'm just trying to get an acurate picture in my mind of how this works, from a fairly cold start. I won't clog up the piclist with any more, if anyone knows of a list for ISP's -- much obliged. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu