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UPC 12mb/25mb/50mb/100mb BB confirmed.
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I'll try, but don't ask for details ;-) all found on google, I have a rough idea how it works:
SNR - signal-to-noise ratio, more the better, limit for QAM256 modulation is 35 dB + 3 dB for changing conditions. So you're on the limit (not good, but not very bad)
POWER (downstream) - -3 to +6 dBmv. That's a general rule. You're on -4.9 to -6.9 dBmV, so it's out of the limits. It could work, but probably combined with low SNR results as 15Mb instead of 100Mb.
If someone can correct me please do it!!
BTW, UPC upgraded my 30Mb to 50Mb minutes after my phonecall, but old router doesn't handle that, so I have no internet at home now.
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Makes sense! Would explain why speeds are varying from 15mb to around 85mb or so. Still waiting on them to come back to change the outside box thing (whatever it's called) so hopefully that'll improve things.I'll try, but don't ask for details ;-) all found on google, I have a rough idea how it works:
SNR - signal-to-noise ratio, more the better, limit for QAM256 modulation is 35 dB + 3 dB for changing conditions. So you're on the limit (not good, but not very bad)
POWER (downstream) - -3 to +6 dBmv. That's a general rule. You're on -4.9 to -6.9 dBmV, so it's out of the limits. It could work, but probably combined with low SNR results as 15Mb instead of 100Mb.
If someone can correct me please do it!!
BTW, UPC upgraded my 30Mb to 50Mb minutes after my phonecall, but old router doesn't handle that, so I have no internet at home now.0 -
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For downstream, the most important number is SNR. If the power level is low, it won't matter provided the background noise level is also lower than expected. A weak but clean signal can be dealt with by the modem simply by turning up the internal amplification of the signal. AKA automatic gain control. There is a limit to how weak a good signal can be compensated for by the modem but the downstream value here is not at that point so that's why the modem is working fine.I'll try, but don't ask for details ;-) all found on google, I have a rough idea how it works:
SNR - signal-to-noise ratio, more the better, limit for QAM256 modulation is 35 dB + 3 dB for changing conditions. So you're on the limit (not good, but not very bad)
POWER (downstream) - -3 to +6 dBmv. That's a general rule. You're on -4.9 to -6.9 dBmV, so it's out of the limits. It could work, but probably combined with low SNR results as 15Mb instead of 100Mb.
If someone can correct me please do it!!
BTW, UPC upgraded my 30Mb to 50Mb minutes after my phonecall, but old router doesn't handle that, so I have no internet at home now.
The power level is more important for Upstream. Or at least you can draw more conclusions for the upstream power value than the downstream power value. The modem can only increase power up to a point, 56dBm I think. The modem only needs to work at a fixed level of SNR, i.e. the SNR needed for 16QAM plus a small amount of margin. So its power output will be the noise value plus an extra 20dB or whatever the signal margin required is. The upstream power value is therefore basically a direct measure of how good the upstream signal is.
Long story short, upstream values below 50dBm are good. It seems like UPC's cable is hindering the downstream channels excessively compared to the upstream. Shouldn't be too hard to diagnose and find the problem and have it fixed!
Speed fluctuations probably come down to how busy the internet itself is or how busy websites are! Most websites wouldn't be setup to provide 100mb/s of their bandwidth to any one browser. And speedtest.net is sometimes not very accurate.0 -
Had the box delivered today and after hours of phone calls am left very disappointed.
Signed up online for 100mb ad yet was put on 50mb.
Received router and a modem, unfortunately modem cant handle 50mb let alone 100mb and yet was given phone line. Fixed but was annoying.
This would all be okay if the 50mb actually worked but, Turns out speedtest.net can't calculate my upload now, it just freezes.
Can only get over 1mb on a 50mb connection that's meant to be 100mb, called the guy and he said that the router had been double loaded, whatever that means hopefully it is fixed by tomorrow.
........very disappointed. Took me 3 days to get the old one working properly so.....0 -
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Bit of an update on this. Installer came back yesterday and installed a new box-thing on the outside of the house but as still getting a bad signal reading. Checked the houses both sides and came back and said the houses either side both have a reading of 10, but mine has a reading of -1. Another guy coming out today to check if it's a problem with the box or with the cabling either side.Finally got 100mb installed this morning!
Installer said the signal is "shíte" in my house, but the houses either side are fine. Speed is currently running at 15meg according to speedtest.net (unreliable at best, I know)
He's said someone will be out later today to fit a new box-thing outside the house and that should fix things. He's due to call back too to run some speed tests he said.
http://i101.photobucket.com/albums/m65/bennyx_o/Untitled-2.jpg
That's the info from the modem, all just numbers to me. Can anyone explain just how bad it is?
Cheers
On a side note, the UPC Mediabox we also had installed wont come out of standby at all. Hopefully this isn't a sign of things to come!0 -
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it depends on if you ordered the self install option or an engineer install when you ordered it.I've ordered the 50mb, guy rang my sister and says to have the old box ready for collection tomorrow. Does this mean I'll have to install it myself or will the guy do it. I've had bad experiences installing routers in the past.
it's simple enough though, you just need to plug out the old router and plug in the new one. it comes with instructions and a CD and it's pretty straightforward so you should be okay.0 -
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Another update on this. No one came on Saturday to check (didn't expect anyone to as the installer had come on the Friday without any appointment) The mediabox was still acting up so my mother called them and went through everything with them and still got nothing, so they're sending an engineer out on Wednesday to fix that and hopefully will check the point on the outside, too.
Yet another update. Had two guys call today and they said they would sort it. They seemed to change the trunk or tappets or whatever they called them on the outside then left. I've since checked the signals on the modem and this is what I saw.
I'm no expert, but I can tell these are worse than what they were before (between -4.9dBmV to -6.9dBmV)
They're still due to come out tomorrow for the Mediabox, so will mention it to them. Has anyone else had any experience of low signal and how long it takes to get sorted?0 -
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