does the modem have snmp so can collect stats remotely?
I have a cacti server for this sort of thing much better suited than a local windows box.
Not sure what you mean about the modem having snmp.
I occasionally remotely monitor connections via LogMeIn (Windows 7 at my end & XP, Vista or Windows 7 at the other end).
If you can access an email server, a program named Blat (as just one example) can be used to email logs from the remote location & this can be automatically scheduled via Windows Task Scheduler & a simple batch file.
e.g. I have the remote connection's 24/7 Ongoing_Stats.log emailed to me at midnight every night & the snapshot Plink logs at 02:00 & 14:00 every day.
If I ever want/need additional logs etc. I can always login via LogMeIn, although once everything is all set up that isn't really necessary.