Tested and working under Win98SE.
Found these seperately here on DriverGuide. Not clearly identifed for this modem
From label on board
W98 detects modem as 56KIFxE (I think thats it)
Trade name: MediaSurf DSP
Model No. : MS2820
FCC Reg No.:51FSNG-32027-MM-E
Board has two chips larger chip has label MediaSurfDSP covering chip
ESS Teledrive ES2820.
Smaller chip is ESS Teledrive ES2818F
Install the driver first then follow instructions under V.90 Upgrade.
W98SE detects modem as
Upgrade will change modem ID under Windows to ESS56I.
Hope this helps somebody.