DSL distance from CO...

[MoobyTheGoldenCalf]

I just ran an online prequalification for DSL at CNet and the report came back that I am 16368 feet from the Central Office and that I am in a serviceable area. However, when I try to run the pre-qual at either Verizon or Earthlink they both tell me I am not covered. What's up with that? Is the CNet report wrong with the distance or have Earthlink and Verizon not updated their databases yet? (The DSL Central Office in my area is pretty new, I think they just got it running about 3-4 months ago).

Thanks

 

[Viper GTS]

Distance is not the sole determining factor.

Ask them if they can send a tech to test from your location, if so they may be able to qualify you that way.

Viper GTS

 

[Ausm]

Talk to a service Engineer maybe be able to reroute you to get you closer...I know several people in my local community that could experience DSL heaven with just a little bit of rerouting...


Ausm

 

[flexy]

i experienced that here (in the us) ISPs and DSL companies often mix up real async DSL with "IDSL" (which actually is only ISDN).

They say you're in range "for DSL" (like 15000ft and more)...and if you dig further it comes out they want to sell you ISDN/ISDL if you dont qualify for "real" ADSL where 15000 ft and longer are of course way out of distance. (IDSL is only like 128kb down/128kb up with channel bundeling, ADSL is much faster at the downstream side, like 1.5MB/s)

Dont let them fool you selling you ISDN as "DSL" !

I also wouldnt even consider getting real DSL (if someone would offer it) at a distance to the CO like 15000ft (like i am right now)...its too far for reliable and fast connections...just to avoid disappointments regarding speed etc. in advance....

 

[Texmaster]

<< I just ran an online prequalification for DSL at CNet and the report came back that I am 16368 feet from the Central Office and that I am in a serviceable area. However, when I try to run the pre-qual at either Verizon or Earthlink they both tell me I am not covered. What's up with that? Is the CNet report wrong with the distance or have Earthlink and Verizon not updated their databases yet? (The DSL Central Office in my area is pretty new, I think they just got it running about 3-4 months ago).

Thanks >>



If you really are 16k away, the only thing you could get is IDSL. 144/144.

Try Covad Mooby.

 

[saltedeggman]

the quality of the phone line also affect speed

 

[MoobyTheGoldenCalf]

Thanks all. I know we have good phone lines here (this is a brand new subdivision and a brand new house, plus my dialup always connects at great speeds). Maybe I'll call to see if they can come out to do a prequal. I've heard a boat load of horror stories about people signing up for DSL only to get stuck at crap speeds (sometimes slower than dialup) so I'm not going to jump into this one right away.

 

[4824guy]

Distance in copper lines from the CO to your house is not the only way they can get DSL to you. If there is a electronic Digital Subscriber Loop (SLC) feed station that feeds your area, like a Litespan 2000, or other electronic means, they can supply DSL to you also. The only way to get a real determination is to get a good tech out there to see what type of facilites there are in your area. He may also need information for the phone company engineers to see if they can come up with DSL route for you.

 

[Techn0freak]

hey,
i use to work for a major dsl provider doing tier 1 tech support (a dsl provider thats in about 13 mid-west and western states) for that provider it was 18,000 ft from the cust house to the CO station. Also line quality is somewhat an issue, if your dsl provider runs DMT line encoding (the standard, like docsis standard for cable providers) than line quality does not matter too much, BUT if your dsl provider runs CAP line encoding then the line quality does matter.

BTW - the 18,000 ft limit is because there is something called a load coil.

"Load Coils are devices out on telephone poles that filter out line noise. Around here they are placed every 18,000 feet.

On the PSTN voice communications occur in the frequency range of 0-4 khz. What a load coil does is filter out anything that may interfere with the voice transmissions. It is for this reason that around here the max range for DSL is 18,000 feet. DSL operates at frequencies above the voice frequencies (1 - 25 mhz). If a DSL signal hit one of these load coils, it would be filtered out and your DSL would cease to function."
^^-From a write up at everything2 from a friend that also did the same job

 

[4824guy]

<< Load Coils are devices out on telephone poles that filter out line noise. Around here they are placed every 18,000 feet >>



load coils are normally trimed out and removed from the lines for DSL and other high capacity circuits like the old style ATT 1.5MB spans.

Removing a load coil should not be a problem in most situations.

 

[4824guy]

<< "Load Coils are devices out on telephone poles that filter out line noise. Around here they are placed every 18,000 feet. >>



not completely true. They don't filter out noise. They are placed on copper pairs to conter the effect of capacitance that occurs from the twisted pairs and their length. The further out a pair of wires go, the more capacitance is on the pair. This changes the frequency bandwidth of the pair, and how the normal talking vioce would sound.