ADSL is TCP/IP and TCP/IP is data based, each time a packet of data is sent, it must be acknowledged with an acknowledgment packet.This is the reason to slow down the system.You can increase the size of the window (TcpWindowSize) value on the end of the receiver to keep the sender from having to wait for every packet to be acknowledged before sending another one.Then,the sender can send packets until that value is reached before the receiver needs to send an acknowledgment.You...