Hi, the conversation begine fine each time but after 15min or so the connection falls over with Skype and it tries to reconnect, after reconnecting it works fine until again about 15 or 20mins later ....

Me - ADSL2+, very good quality, I am 40m to the exchange, Speedtest getting 15Mbps down and 0.85 up.  Using desktop computer. 

Other person - Japan, on 3G mobile network with iPhone 4, it's their connection at home with laptop or away from home. 

Ideas?