There's a good article on it here.
Cheers, I'm on my way out for an appt but will read it later. I am always wary of what Cochrane says and how he bigs up his own importance. I have some technical papers written by respected BT engineer developers from that period of time, Theres quite a lot of listed names of people responsible and very clued up in broadband technology. Cant recall the dept names now as Ive not looked at them since I did some stuff for the site more than 10yrs ago. Those people were very astute when it came to future broadband technologies. Its surprising what was known and discussed 20-30 years ago.. Cochrannes name wasnt one of them. :/ I should shift through it all and do a write up some day because atm there is only Chochranes version not perhaps giving true credit where due.
