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Cable Signal strenght question
Posted: Tue Jan 08, 2002 11:32 pm
by CAT5
I have attbi now, used to be excite@home. Before the switch, my download speed is around 400-600KB, but since attbi took over, my download is now around 180KB an it's totally sucks. ? This drop in download happened when attbi took over and when another person near by apartment also got attbi. I just wonder if those of you have attbi, what is your average steady download rate?
And so I complained and they sent a tech over and he said every was ok, the only left questionable is that he said my signal strength is too high, around 10. something that I don't know what the unit of measurement is. But he said the signal strength is too high, this could cause problem? Anyone know anthing about this and what can be done?
Posted: Wed Jan 09, 2002 12:20 am
by MadDoctor
Not that it helps but my download is now around 180KB too. Attbi... 1500/128
Posted: Wed Jan 09, 2002 12:49 am
by therealcableguy
cat5,
He was probably refering to the signal level at the modem.10db should be fine.Your speeds have dropped because AT&T has changed your service to 1.5MB downstream.
Posted: Wed Jan 09, 2002 1:57 pm
by eddiec
And by the way, signal strength has nothing to do with speed. Nada. Zip. Nil.
Posted: Wed Jan 09, 2002 5:00 pm
by Homicyde
well in that case, what kind of factors have a big effect on Speeds and pings?
Posted: Thu Jan 10, 2002 9:28 am
by MtCableman
Originally posted by Homicyde
well in that case, what kind of factors have a big effect on Speeds and pings?
1. NIC
2. Quality of the Ethernet cable.
3. O/S setup, TCP RCV setting....ect....
4. Anything that can generate or introduce noise, the above items and the cable connections. Bad fittings, corrosion, bent or broken cable. Noise introduced by the actives on the cable facility like amplifiers if they are not set correctly.
5. NET CONGESTION, overused connections on the internet. These can be seen with a traceroute. This includes servers that are overrloaded or connected with a slow connection.
Remember that slow speeds can be attributed to "resending" data. If the first data is corrupt the computer will ask to resend the data which would appear to be slow speeds. If you have cable TV that is digital, it could show up in the pictures as "tiling" since digital cable doesn't have the luxury of resending the data. A cable tech can identify this probelm with a carrier-to-noise test or using a QAM meter. The MER, modulation error rate, should be higher than 24-26dB or higher than the manufacturer specs on the modem.
Posted: Thu Jan 10, 2002 9:57 am
by Lobo
Comcast has it now 1500/128, no speed
