Networking 30 computer to T1, is it ok. and how do i do it

[evilangel]

If i have 30 computer and want to share t1 connection how can i do it? Will all 30 computer be able to access the net? what will be the connection speed for each computer? Do I need to assign static ip for each computer? Or can i make it dynamic? If i can how can i do it and what equipment do i need. Also anyone know where i can get the cheapest t1 connection that up 1.5 and down 1.5

 

[CoolTech]

the best way to do this and manage it in an efficient way would be for you to use a computer as a router, so u can have a lot more options, like limiting the rates of each other, etc. One of those cable/dsl router types are easy as well, but i have never had experience with a real T1 direct connect, but I believe it has a cat5 connection. Connect cat 5 to, say, a linksys 1, 4, or 8 port router and u can connect as many switches/hubs to the router as you want, well, not as many as u want, about 250, u only need 30, so this should suffice. Also, I recommend switches, most switches have same performance, just get the one with the best warranty. I have a linksys and it performs very well, 7 megabytes/second transfers on lan the linksys router has a built in dhcp server which means it is dynamic and just gives out ip addresses, thats the easiest way i believe. good luck, contact me if you need anymore help.

 

[CoolTech]

also, a real T1 connection will cost u a lot more than DSL which can haave about the same transfer rates, but T1 is hardwired to your home and dsl travels over copper telephone wires. i believe they run like 1500/month, while dsl u can get for maybe 200+/month for the bandwith u need, but also for dsl there are line quality, and distance from your central office concern to consider. T1 is usually connected to large bandwith bases as well. hope this helps.

 

[bex0rs]

If you're getting a T1, you're not going to want to have all of your clients on geigh private IP's. Part of the reason you are paying for a T1 is to get routable public IP's. Invest in a Cisco router.

~bex0rs

 

[bex0rs]

You may also consider business class 1.5 SDSL if cost is an issue. IIRC, Speakeasy offers it for ~ $500/mo in the bay area. It will probably come out cheaper than a T1, and it will also be faster. T1's are only 1.1 up/down.

Edit: See reply below by Damaged. I gave some incorrect information.

~bex0rs

 

[Damaged]

A T-1, DS-1, T-span, or whatever you'd like to call it is 1.544Mbps up and down. Whatis.com link with a brief explanation of T-1 carrier. I don't know where you got 1.1 from bexors but that's just flatly incorrect. No offense. I'll spare y'all the B8ZS/ESF, TDM, et al. Doesn't really matter for what's being asked here at all.

Physically it consists of two twisted copper pair (send and receive) and it terminates to a CSU/DSU (Channel Service Unit/Data Serice Unit). Actually the TelCo will install something called a SmartJack on the customer premise and after that it's up to you. Typically if you order through an ISP they will loan you the router and the CSU/DSU. Back in the day the CSU/DSU were two separate devices but these days they are pretty much one in the same. For example, we loan all of our customers a Cisco 1605R with T-1 WIC and 8MB of flash RAM if they order a connection with us.

So, you'll need a CSU/DSU and then you'll need a router to route the IP traffice and you'll need at least a hub, though I'd go with a switch, to connect all the other machines.

Speed of each machine? Depends. If only one machine is using the connection at a certain time then that machine will have the entire T-1 available to it. Two machines, half it, etc., etc..

Pricing. Varies greatly from region to region and from provider to provider. In the Ameritech Region we do a full zero mileage T-1 for $550.00 per month on a 5 year agreement. The shorter the time the more the monthly. There's also an installation charge. Again this varies greatly from region to region and from provider to provider. I think on the 5 year deal we charge like $250.00 install on a zero mile T-1. Again, that install charge goes up with shorter terms...I think. I'm not sure, I'm not in sales I'm in engineering. But I'm pretty close.

Same T-1 with AT&T in my area: $1000.00 install and $600.00 per month on a 5 year deal.

IPs. You can do it either way: statically assign or via DHCP.

 

[evilangel]

What if ppl play game, for example 10 or 15 ppl play game online like counter strike at the same time, will it be a problem for example lagging? Can you tell me which service is better to use sdsl, adsl, t1, cable, sprint ion(?) Thank you

 

[bex0rs]

/me shamefully hides :Q

 

[mmaki]

Thanks to Damaged for the good T1 info. As for 15 to 30 people playing games it depends on where they are. Are they all on one of the 30 boxes you are setting up on your side of the T1? If so and they are all on a 100mb switch they all get 100mb locally (theoretically of course, I think with Windows networking it's more like 40mb w/ full duplex). Now, going over your T1 it's all a percentage deal, if 30 are using the T1 then it's 1.544mb/30=51.4kb (just like a 56k modem right?) Please folks, correct me where I am wrong.

 

[bex0rs]

Since I'm not the resident T1 expert, I could be wrong on this as well, but I belive that Damaged was saying that the bandwidth of the T1 is shared, so if one client is not doing anything online, they will not be tying up any bandwidth. So if you have 30 people connected and only 1 person downloading, that person will have the full bandwidth of the T1 available, unless you have configured the router to limit the bandwidth of individual connections.

~Kenn

 

[Damaged]

It would help to know exactly what the line is going to be used for to answer any other questions. Sounds like just gaming/personal use. If that's the case T-1 would be a pretty expensive option and a business class DSL service would be a much better deal...as long as you're in range.

Why business class? Simply because you're probably going to need a block of routeable IPs for all those gamers to each have a unique IP. My understanding is certain games, CS in particular, only allow one gamer per IP due to whatever they do in checking the validity of the client software.

 

[Damaged]

It's only shared because it's being utilized in an IP scenario here and multiple computers are connected via a switch. A T-1 itself is a dedicated point-to-point connection from one physical location to another. In the example of this case it's an end user and an ISP.