One suggestion, Try out the Thomson Speedtouch 516. I have 2 of them and they have both been rock solid, never had to reboot either of them. Not sure what modem Thomson you have, but the 516v6 is great.
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www.speedtouch.ca/pdf/Da ··· 16v6.pdfGreat modem, no wireless or built in router, Just an ADSL2+ modem.