hi..everyOne..enjoy.. i m comptr eng. student from gujarat.. recently i have taken home 500c..i have a zte zxdsl 831 aii...work in pppoe..always on mode...
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through net i found some very interesting things and i have made my own batch file & 1 autohotkey script to reboot modem.. that also worked great in my presence.. so i put that in auto power on and shutdown and restarted it every 1 hr..
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files.....
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1. my .BAT file contents..))schedeuled to run at 2.10...3.10...4.10...5.10...6.10...7.10...
tskill uTorrent
sleep 5
devcon disable =Net
sleep 5
devcon enable =Net
sleep 5
cd F:\BSNL Night Unlimited
rebootModem.exe
sleep 60
devcon disable =Net
sleep 5
devcon enable =Net
sleep 180
C:
cd Program Files
cd uTorrent
uTorrent.exe
sleep 5
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2. my rebootModem.exe was done by autohotkey script.. that script contents..

)
Run telnet.exe
WinWait C:\WINDOWS\system32\telnet.exe
WinActivate C:\WINDOWS\system32\telnet.exe
Send o{SPACE}192.168.1.1{ENTER}
Sleep 1000
WinActivate Telnet 192.168.1.1
Send admin{ENTER}
Sleep 1000
WinActivate Telnet 192.168.1.1
Send admin{ENTER}
Sleep 1000
WinActivate Telnet 192.168.1.1
Send system restart{ENTER} // change it to reboot..
Sleep 240000 //
WinActivate Telnet 192.168.1.1 // if system restart doesn't work..
Send user logout{ENTER} // for ur modem
Sleep 2000
WinActivate Telnet
WinClose Telnet
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3. one more file Close.bat .. i was using it to close the first and this.. both bat files..because the first one didn't closed automatically..scheduled to run at 2.30...3.30...4.30...5.30...6.30...
sleep 2
tskill cmd
exit
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change ur all dns servers to 208.67.222.222 & 208.67.220.220
and proceed to opendns.com for more assurance of success
i wud lik to mention that setting ip on ur pc alone is not sufficient.. u also have to change dns in the modem i did that by connectiong to 192.168.1. 1 / home1.html ..... ya home1.html.. thats the secret pg for this modem.. click on dns client on the left side frame.. u can change-add-remove dns servers of modem..found by google.. thats my internet god.... enjoy..
would be grateful to solve ur queries..