Thanks everyone,
I've finally (and with due credit to Adam Skeaping, a contact made through another bulletin board) managed to establish a stable setup (
- touch wood!)
I'll post the resolution here in the hope that anyone else searching the 'net for clues (as I did for many an hour) may stumble across it.
- Downloaded the latest (2.099.040.000 ) drivers from
http://www.themad-house.co.uk/Conexa...t-drivers.html which appears to have eliminated intermittent GPFs in IE / Opera.
- Ignored the PIPEX assertion that ITU G.dmt modulation should be selected, instead selected ANSI T1.413 i2 modulation (top recommendation from Adam)
Strange resolution, but seeming stable and connects v.quickly after restart / reboot.
Craig