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I have a D-Link DSL-2750U adsl modem router, it shows me my Upstream is 1291 Kbps and my Downstream is 4095 Kbps, but download speed is only 20 KB/s, is there any way to change configuration to speed up my wan connection? As a note D-Link DSL-2750U is able to put and get config file using tftp protocol which I tried to change config file and no luck, any idea?

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How do you measure your speed? Try to ping your provider's dns server to see if there is a packet loss (with 1 kbyte packets, for example) – int Nov 22 '12 at 16:46
Pinging with 32 bytes of data: Reply from bytes=32 time=273ms TTL=44 Reply from bytes=32 time=282ms TTL=44 Reply from bytes=32 time=270ms TTL=44 Reply from bytes=32 time=375ms TTL=43 – user136937 Nov 22 '12 at 16:57
I don't know what you mean, I told about that how I measure my speed, downstream speed is 4095 Kilo bit per second but my download speed is 20 Kilo byte per second. – user136937 Nov 22 '12 at 16:58
Speed measurement can be done using say or DSLREPORTS also has some additional testing tools. You can use several such sites to see if there is a common issue – Dave M Nov 22 '12 at 17:07
You can try to download some torrent (for example, ubuntu.iso) to check your speed. If it is still slow, check: 1) Connect modem without splitter ( and try again 2) Traffic limitation from your provider 3) Your current tariff's speed 4) If above does not help, you can ask your provider to change your adsl profile on their hardware(DSLAM). – int Nov 22 '12 at 17:08

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