DSL

PBMAX · Jan 16, 2004

Most of the folks I know that have DSL buy there on modems.
Based on specs provided by the DLS co. Most have told me there reasoning is , that by the time they lease/rent one for a year they could have paid for one... of equal if not better qulity. All though if you're pron to lighting damage and the DSL co. is cool about it it may be better to rent... /forums/images/graemlins/wink.gif

Enjoy!!! I know I whish I could get one, but I still have to wait 12-18 mth before they even get close enough to me yet..... /forums/images/graemlins/mad.gif

MadReferee · Jan 16, 2004

re: Well worth the extra $20/month.

Wow. I pay only and extra $6.78 for my DSL line. I guess it helps to be serviced by a small local phone company.

MikePA · Jan 16, 2004

I pay only and extra $6.78 for my DSL line. 
/forums/images/graemlins/shocked.gif I'm going to call my telco and ask about this.

Von · Jan 16, 2004

I have DSL here at home and at work. Both the modems and all the filters one would need is free! Much cheaper than the cable hookup I got rid of! cost is half of cable! and just about as fast. I'm sold on DSL!

AndyM · Jan 16, 2004

Out here, Sprint is our local phone company, and they are giving me DSL for $29.99 per month. Not only that, but they sent me a "loaner" modem (I have to send it back if I cancel my DSL) and four free filters.

Not a bad deal, in my opinion!
Much faster than dial-up and much cheaper than cable ($49.99)

RanchMan · Jan 16, 2004

Thanks for the reply, Bob.

Seemed like it should work to me, just haven't had the need to try it (i.e. I don't have a DSL connection or fooled with DSL CPE stuff before.)

I've never had the chance to "pop" open a DSL filter and see the contents, but I figured (correct me if I'm wrong here) that it functioned like (perhaps even using similar components) as a passive crossover network as used in the world of audio.

In the world of ADSL, it's my understanding that everything below 4kHz is still allocated to voice (POTS) while 26kHz to 1.1mHz is dedicated to data (with 4kHz to 26kHz being "no man's land" because of the high-pass and low-pass filters).

If I'm off base with my analogy or specs, let me know. Always open to learning something...

BTW, attached is a revised (i.e. corrected) version of how CPE xDSL could be set up, at least as I understand it.

RanchMan · Jan 16, 2004

KubotSteve -
Maybe my revised picture will make more sense (posted above).

Think of it this way - in your scenario, if you bought a, say, 1-to-3 phone jack adapter (see attachment) at Radio-Shack (male one side, 3 females on the other) and then plugged that in to the "Phone" jack on your splitter, then hooked up 3 phones to that 1-to-3 way adapter, you could have 3 phones operating and 1 DSL modem operating - all without buying any additional filters/splitters.

Essentially, my diagram (revised one) is intended to communicate that, but instead of being on the outside of the wall, just imagine it takes place in your attic as all the phone lines in your house should be wired back to a central point somewhere - i.e. "junction box" and 1-to-3 adapter = "secondary junction box." (even if they weren't, it should still work, but I don't want to complicate the matter as the principle I was inquire about would still apply.)

Anyway, hope this clarifies my question -

Thanks for the reply.

PBMAX · Jan 16, 2004

Von, Charter runs a good prtion of the DSL here Cable that is and some areas like my moms and a good pal of mine just went to 2.5mbs at no xtra charge to those already paying for the big pipe speed. What irks me is there main line runs through my neck of the wood but they won't go 1/8mile to my house for 1-4 possibel customers..... even for cable and/or DSL.... THE DERN MEANIES.... /forums/images/graemlins/grin.gif

A well when you chose to live in the country you often have to except the country pace of life....

BobReeves · Jan 16, 2004

That adaptor will work but I think it's doing it the hard way.

You home/office is already wired with phone jacks, hopefully where you want them. All the jacks are wired back to a central point called a demark by the phone company. You need to find the demark and do all your wiring on your side of the demark. Look for a grey box either outside on the side of your house or maybe in the garage.

There are almost too many possibilities to go into detail on how exactly how to hook everything up but basically what you want to do is disconnect the house wiring from the demark, run all the wires plus a new wire from your side of the demark into someplace where you can get to it out of the weather and make new connections. Go to Radio Shack and get 2 or 3 surface mount modular jacks to do your hook ups with. You want to put the splitter between the wire coming from the demark and your house wiring then all you need to do is connect your DSL modem to the DSL side of the splitter.

And yes a DSL splitter is simply a passive filter. I am better at doing than explaining to someone how to do...

BILL_K · Jan 16, 2004

Ranchman

Your proposed example is exactly the way it should be wired.
The splitter is a special whole system filter and is the way that I had the phone Co.
set up each of the two DSL lines at my house! This works better as each
separate filter can cause a decrease in your speed. There is also a limit as to how
many filters you can put on a line without causing problems.
I have rewired many systems this way resulting in up to a 20% increase
in speed. I do small office and home DSL setups plus networks
and this is one thing that I require on any system I install.
Just be sure you get the right filter/splitter!

Be sure to have a hardware firewall and a software firewall
and to install and keep up to date a good anti-virus program
Billk

RanchMan · Jan 16, 2004

'really' expect? 

Ready for a non-comittal answer?? /forums/images/graemlins/tongue.gif /forums/images/graemlins/wink.gif

Simply stated, until you get it, you really won't know for sure. Some folks get dern near what the telco's promise, some don't get anywhere near that.

You can get a "feel" for what type of speed you will get by going to DSL Reports - Speed Test , running the test, then at the bottom, adding your results to the database, going to the next page to "review others" and then typing in your zip.

Kindof a round-about way, but better than nothing. PLEASE NOTE: Although this may give you a "feel" it is FAR from certain due to the different pieces of equipment others may be hitting compared to the pieces you'll be hitting once you have your xDSL up and running.

RanchMan · Jan 16, 2004

That adaptor will work but I think it's doing it the hard way. 

I agree - I wasn't recommending using such a device, just trying to explain (in principle) the connectivity model using the items KubotaSteve mentioned. Talking to a couple of different audiences here in this thread I suppose - which can make things a bit muddled at times.

I am familiar with the concept demarcation points - and although my "quickie" diagram didn't label the anything as such, it is in there.

I agree with your point that there are too many possible combinations of wiring, equipment layouts, etc. to illustrate all possibilities - but I really wasn't trying to do that - really just trying to illustrate the question I had regarding if a single filter/splitter would work for multiple POTS instruments and thereby eliminate the costs associated with having to buy multiple filters.

BTW, thanks for confirming my understanding on how the filter worked.

OhioTC18 · Jan 16, 2004

DSL Filters for $1.50 each unless you want 100 then they're $1.00 each

DSL filters

RanchMan · Jan 16, 2004

Bill_K -

Thanks for the info. You have raised my curiosity a bit with regards to the multiple filter aspect...

Specifically, I have 3 questions:

1) How do the extra filters hurt the signal which causes a reduction in speed (attenuation??)

2) Do they cause problems even if the voice instruments aren't off-hook?

3) Are the limits regarding # of filters standard or are they developed by the LEC for their specific implementation of xDSL?

Tnx! /forums/images/graemlins/laugh.gif

JJT · Jan 16, 2004

Ranchman, I have DSL and no filters on the phones. I get no interference whatsoever from the DSL. My package came with filters, (at no cost) but I had no need for them. If I'd known they were worth $20/ea I wouldn't have given them back to the phone co when they stopped at the house to check on the install.

BillyP · Jan 16, 2004

Went by the telephone office this afternoon to sign up. It said on the app the maximum speed would be 384kbs. They won't guarantee what I'll actually get.

Oh well. Still has to be better than what I have now.

art · Jan 16, 2004

Billy I use it and feel I have had good luck with it. I haven't experienced many other systems to know the difference. It sure does beat the old 56K modem!

MadReferee · Jan 17, 2004

Most DSL systems that I have seen are dual speed, a high speed for downloads and a lower speed for uploads. Since most home users rarely ever upload this is acceptable, unless you are running your own web site hosted by the ISP.

sendero · Jan 18, 2004

Re: upload/download speeds.

Almost all are this way. You are not supposed to be running web servers off of it, and this is one way to make sure that if you do, it won't handle much traffic.