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Downstream Power Level

post #1 of 6
Thread Starter 
Hey guys,

Does anyone know what can affect the downstream/receive power level between the tap at the pole by our house and the ISP? I heard was something that is affected by weather, something that stretches and contracts during different weather conditions which affects the downstream power level. What is that called and how does it work exactly?

The reason I'm asking is because during cold days the receive power level sits at 5dbmv but during warm days it becomes -12.9dbm and when it gets so low the downstream SNR is affected too (becomes less than 30) and the internet gets slower. Even though the download speeds are not affected, I can feel it during gaming, it just feels slower.

Can someone shed some light on the subject?
post #2 of 6
Bump.

Cable or DSL? Cable, the speed is not guaranteed (since it's shared)... but DSL is almost always guaranteed as long as their service is up (dedicated).

mrwalker, have you tried unplugging the power for the modem and/or router you are using? Let them cool down and in a way give them a power reset...

This seems like a common problem, that Internet is getting slower and slower as we use them... (ISPs might be the ones behind this...) a periodic power reset for the equipment help to get the speed back.
     
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post #3 of 6
Quote:
Originally Posted by ocman;12187312 
Bump.

Cable or DSL? Cable, the speed is not guaranteed (since it's shared)... but DSL is almost always guaranteed as long as their service is up (dedicated).

mrwalker, have you tried unplugging the power for the modem and/or router you are using? Let them cool down and in a way give them a power reset...

This seems like a common problem, that Internet is getting slower and slower as we use them... (ISPs might be the ones behind this...) a periodic power reset for the equipment help to get the speed back.

No speeds by any ISP are guaranteed. Cable ISPs slowing down hasn't been an issue for 10 years. If you're cable internet is slow, you have other issues. A single node can handle over 10,000 users at full traffic.

A wouldn't say a common problem is peoples household connections gradually getting slower; my personal modem has been up and running for over a year without a single reset, same goes for my firewall. While heat seems to be an issue with lower end units, a properly built system has no issues.
    
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post #4 of 6
Thread Starter 
Quote:
Originally Posted by ocman;12187312 
Bump.

Cable or DSL? Cable, the speed is not guaranteed (since it's shared)... but DSL is almost always guaranteed as long as their service is up (dedicated).

mrwalker, have you tried unplugging the power for the modem and/or router you are using? Let them cool down and in a way give them a power reset...

This seems like a common problem, that Internet is getting slower and slower as we use them... (ISPs might be the ones behind this...) a periodic power reset for the equipment help to get the speed back.
I have cable and even though sometimes when I reboot the cable modem the performance increases for a while, the downstream power level and SNR stay low.

Can anyone tell me about the device or whatever is used between the pole tap and the ISP that allows the power level to fluctuate due to weather conditions?

Two days in a row the power level has been -13 and below and it usually gets better at 4-5dBmV in the evening when it starts getting colder again.
Quote:
Originally Posted by killabytes;12187570 
No speeds by any ISP are guaranteed. Cable ISPs slowing down hasn't been an issue for 10 years. If you're cable internet is slow, you have other issues. A single node can handle over 10,000 users at full traffic.

A wouldn't say a common problem is peoples household connections gradually getting slower; my personal modem has been up and running for over a year without a single reset, same goes for my firewall. While heat seems to be an issue with lower end units, a properly built system has no issues.
My speed gets slow during evenings and weekends when other users are on the internet. That means my ISP is either using old technology or they're overloading the nodes and I think it's the latter.
Edited by mrwalker - 1/29/11 at 12:58pm
post #5 of 6
Thread Starter 
Can someone help with this?
post #6 of 6
Quote:
Originally Posted by mrwalker;12188104 
My speed gets slow during evenings and weekends when other users are on the internet. That means my ISP is either using old technology or they're overloading the nodes and I think it's the latter.

The problem your experiencing is due to the ISP (specific to cable) overloading their nodes. The cable company drops 1 connection into your neighborhood and splits that to the houses. This is also done with phone companies that offer Fiber. It is not seen as bad on Fiber due to the larger "Pipe" to the neighborhood node.

This used to be one of the major selling points for DSL. DSL was not split from the neighborhood node but rather at the Central Office (CO).

Each technology had it's +'s and -'s. The only way you will get a guaranteed min bandwidth is to order some sort of a dedicated circuit which is costly, typically $300+/month, tied with SLA's.
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