Question about D-Link DSL-2640B Wireless 11/54Mbps ADSL2+ Modem/Router with 4-port 10/100Mbps switch
In first test you internet connection with speedtest.net, then you can think about your modem
Posted on May 28, 2011
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Posted on Jan 02, 2017
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here is the pdf download link for this modem
should be of some use
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