I have just built a new pc, and used my old modem. This i found was very slow so brought a new Zoom v.92 modem. However Although i can now connect at upto 48k, after about 5 minutes the connection becomes very slow, then maybe will disconnect altogether. If i reconnect again it is fine. But if the pc is rebooted in between or switched off, the same problem occurs. I am using BT Openworld if it makes a difference. I work as an IT engineer so settings are what I would expect but any help or ideas appreciated.