So it's undoubtedly your problem rather than at the remote end... How are you instigating a connection? Through Outlook, Explorer, or directly via the DUN? Was this modem (and DUN) already configured when you bought the laptop? Maybe check out the TCP/IP params. Make sure it's not using any other protocols other than TCP/IP when dialing. Do you have "Telephone Dialing Properties" enabled in the DUN setup. If yes, try disabling and typing the full phone number (and exit code) into the phone number box. Any "Call Waiting" or other options enabled? You didn't say what op system you're using, but is there a "Diagnostics" option under the modem icon in Control Panel? Does it pass ok? Are you plugging the phone connection into a Master phone socket or a Secondary. Is it going through a PBX switch? Are you using extension cables with adaptor(s) etc? These can all attentuate the signal and cause drop out. Temporarily try plugging DIRECTLY into a Master socket with no extension cables, no adaptors etc., say in a different building.
Well there's a few thoughts...
ROGER - GØAOZ.