edit : ah sry බන් මම හිතුවේ උබේ upload විතරක් ස්ලෝව් කියල
down ස්ලෝව් නම් SNR එක බලපන්
SNR ගොඩක් අඩු නම් හරි උබ ඉන්නේ exchange එකෙන් දුර නම් හරි ස්පීඩ් අඩු වෙනවා(Line attenuation)
https://www.speedguide.net/faq/what-is-considered-good-dsl-noise-margin-snr-355
https://www.speedguide.net/faq/what-is-considered-good-dsl-line-attenuation-371
Cable එකේ පුළුවන් ගාන තමා බන් ඔය මම හිතන්නේ.UP 1 megabits වලට වඩා නම් බැරි වෙයි.
WIKI එක බලපන්/youtube එකෙත් ඇති
upload ගොඩක් වැඩි කලාම SNR එක අඩු වෙනවා එතකොට සැරින් සැරේ disconnect වෙන්න ගන්නවා stable නෑ.
SNR = signal / noise (adsl router එකට ලොග් වෙලා බලපන්)
6dB or below SNR is bad, you will experience no sync, or intermittent sync problems
7dB-10dB is fair but does not leave much room for variation in conditions
11dB-20dB is good with little or no sync problems (if no large variation)
20dB-28dB is excellent
29dB or above is outstanding
DSL, cable, and fiber connections need to be divided into different streams for download and upload, and since they all have limits on how much information you can pack into them, privileging download over upload is usually better.
Most DSL is ADSL, where the “A” stands for “Asymmetric,” so the disparity is pretty much baked into the standard.
There’s not much room for more bandwidth in copper wires, so keeping the lines biased toward download is probably for the best.