Okay, I'm rather convinced this can't be done (or others would have beat me to it years ago), but I started thinking...

An analog voice line (for telephones) with a normal modem can't exceed 53.6K (FCC law, but I think ~56K is the max people have managed anyway). DSL lets you get at least ten times that much, as much as 1.5 Mbps on a single line. (Actually, I think 1.5 isn't close to the max, but few places exceed it.)

A T1 is an analog line, is it not? (And a DS1 is the digital equivalent?) And you can get 'phone' or 'data' T1s -- a T1 can carry 16 (?) phone lines, or 1.544 Mbps (data).

So, couldn't one, in theory, split the T1 out into 16 phone lines, and run a DSL line on each one, at 1.5 Mbps each, giving them... 24 Mbps? I get the impression it can't (otherwise this technology might have become more mainstream?), but why not? :confused:

A t1 and ds1 are the samething and both of them are digital. Anyway the problem with running multiple dsl lines would be equipment cost. Since you would need some tyoe of multiplexer/demultiplexer at each end which would keep cost high and not ideal for residentual use. Also the most you would be able to bond would be 2 dsl connections. Remember a t1 is just 2 twisted pair and voice channels on a t1 are carried differently then on a pots line.

A t1 is basically 24 64K channels. You cannot push 1MB on a Single 64K channel. You can only push 64K.

DSL is nice and all but there is a cost for pushing those high speeds. Distance. Get close to that CO and you can get 1.5 or higher. Start moving away and the speed drops big time. I think 16,000 FT or so is where a lot of providers only sell 128K on DSL. Now this is 16,000 in line feet, not how far you are standing from the CO itself.

Hmm... There went my plan ;)

lol, I was pretty sure it couldn't be done, but wasn't sure why.

Originally posted by Niosys
A t1 is basically 24 64K channels. You cannot push 1MB on a Single 64K channel. You can only push 64K.

DSL is nice and all but there is a cost for pushing those high speeds. Distance. Get close to that CO and you can get 1.5 or higher. Start moving away and the speed drops big time. I think 16,000 FT or so is where a lot of providers only sell 128K on DSL. Now this is 16,000 in line feet, not how far you are standing from the CO itself. I think it's about 2 miles.

It also depends on what type of DSL you get as well. I have evaluated equipment that does RADSL (Rate Adaptive DSL) and it was capable of doing 7 - 8 Mbps.

Keeping in mind, this is very dependent on distance from the CO as was mentioned above.

As far as the T1 is concerned, as has been stated it is just 24 64K channels. A PRI which also uses a T1 transport loop has 23B channels and 1D channel for signalling.

-Robert

Originally posted by DigitalIsles
It also depends on what type of DSL you get as well. I have evaluated equipment that does RADSL (Rate Adaptive DSL) and it was capable of doing 7 - 8 Mbps.

Keeping in mind, this is very dependent on distance from the CO as was mentioned above.

As far as the T1 is concerned, as has been stated it is just 24 64K channels. A PRI which also uses a T1 transport loop has 23B channels and 1D channel for signalling.

-Robert Okay, okay, you got me a bit excited now, I live walking distance from the HUB, how can I do this 7 or 8 mbps thing? :D

Don't get too excited. It is dependent on a DSL provider that services that CO, offering RADSL services. You will have to call around and see if anyone offers it.

-Robert

and thats only downstream.

not good for hosting, i think dsl would be considered a tier-2 provider!?

Verizon says that you must be within 900 feet of the CO (at least where I live) to get 1.5 Mbps down. SO, what you should do is call your local phone company, ask for 10 phone lines to be installed at your residence ($40/mo. each), then call your DSL provider (probably the same company), and ask for all 10 phone lines to have DSL (another $40/mo. each), and then create a proprietary multiplexer to handle 10 DSL modems, connect it to your firewall and Voila!, you can download at 15 Mbps from your home.

Next step: sell these instructions and your multiplexer on eBay :)

LOL... It sounds crazy, but I have seen people do some pretty weird things...

-Robert

lol, actually, that's $800/month; still less than a T1 (in most cases) if you figure in the costs of both the line and service on a T1, which often exceed $1K.

Better yet, get lines and DSL service from varying providers, and run BGP4. ;)

if u wanna do hosting on DSL then get SHDSL (the upload matches the download)

seen loads of 8MBit lines from ISPS, and yea thats 8MBit both ways.

this is in the uk tho, and may be different in other coutries

Originally posted by fog
lol, actually, that's $800/month; still less than a T1 (in most cases) if you figure in the costs of both the line and service on a T1, which often exceed $1K.

Better yet, get lines and DSL service from varying providers, and run BGP4. ;)

Your isp's must be willing to setup bgp4 on their end which I doubt would happen. You can easily get a t1 these days for under $1000/month, atleast in the area's I have been in. I guess it probably depends on where you are located.

T1's are also dedicated lines. Meaning no hops from the company who supplies it, to your door.

Your isp's must be willing to setup bgp4 on their end which I doubt would happen. I don't see any DSL provider EVER allowing BGP :)

you can get a business cable modem

with normal cable, i get 3mbps down/256k up

now if i uncap it, i can get 5mbps down/1-2mbps up i think
if you call your cable company, you can get a "business cable line"
which is basically uncapped, and doesnt have ports blocked
( residential cable blocks port 80, 110, and most standard server ports )

Heh, I've actually got a cable modem which gives me plenty of bandwidth, I was just wondering why my idea wouldn't work.

And as far as business cable modems go... We looked at them, wanting something faster that allowed servers. But, alas, their business modems don't allow servers, or even give you a static IP, and the speeds were the same too. WIth Adelphia, at least when we looked, there was literally no advantage to a business line. (Well, I guess they allow multiple computers on one connection, and give you multiple e-mail addresses...) Of course, we have 5+ computers behind NAT and run our own mailserver anyway, so there'd be no advantage to getting a business line from them.

ROFL

If you have an option of getting Cox Communications I wouldnt suggest it. It does work 300 out of the 365 days of the year and you have an outstanding 56-128K upload and a whopping 7-10mb download. Ive called them numerous times of outtages and low levels. So they come out to my house and "boost" the levels, then in about 2 hours after they leave, they return the levels back to their original state.

(Ive even tried offering $ to the tech to boost it up to T-1 status) :P

I know some DSL companies allow higher BW and static IP's, might want to check them out :P

Any DSL providers in Oz that allow servers.. does anyone know?

is there now SHDSL companies around by you

they usually allow u to have many static ips, your own hostnames, and the upload with match the download.

although im not a big fan of any type of dsl because of the distance problem, by that, i mean the further u go the less bandwidthg u get.