Want to become a BT reseller - they say you MUST have ISDN 2e

I made a call to Openreach last week saying I wanted to re-sell BT products. They told me the terms and conditions and one was that I *MUST* have a BT supplied ISDN 2e connection to receive certain data. I mumbled that I was not happy and why not use the Internet like other companies - the response was "ISDN is proven to be more reliable and secure, we wont change that rule"

Come on BT / Openreach talk to each other - people want the service (even your staff!)