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New ISP

Posted on 2000-03-29
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Last Modified: 2013-11-30
I am currently working on a project for my data communications class.  The subject is to build by ISP from the ground up.  I have the basic concept down that people dial in to a server where their passwords are checked and they are connected to the internet through a high speed connection.  But from here I am stuck at where do I start.

Does any one have any suggestions??
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Question by:clangl
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Author Comment

by:clangl
ID: 2667376
I am also aware that I need a router to connect the High Speed COnnection to my Network.
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by:dserna
ID: 2667421
How to build and ISP from the ground up? Well, it's not as easy as it seems. I work for an ISP and believe me when I say that it's not easy.

1. Shop around for a few channelized T1's or  PRI's it depends how many customers you anticipate as having. A Channelized T1 is a T1 split up into 24 channels, each channel can support 1 call with a speed of up to 56K per second, a PRI is more for ISDN, but can be used for normal analog modems calling in as well. It supports up to 23 simultaneous calls. You can get a T1 or PRI pretty much from any local phone company, like PacBell in my area. The reason you need a T1 or PRI is so that you can hook it up to a terminal server like an Ascend Max TNT, Livingston Pertmaster, USR Total Control, Shiva Lan Rover, etc.

2. So that brings me to my next point, you need to get yourself a terminal server, I named a few in #1. Once you have you terminal server and a circuit(T1 or PRI) then connect the circuit to the terminal server. The phone company will assign you a phone number with the circuit, so that when people call in, they connect to the terminal server

3.What you want now are a few switches and routers. You need the switches to connect your network devices and routers to route traffic from your terminal server to the internet and vice-versa.

4. Once you have that, then you have to get yourself an Internet connection, it could be a T1, T3, OC3, etc, depending on how much bandwidth you anticipate you may need. You can get a T1, T3, OC3, from companys such as MCI/Worldcom,CNC, Ziplink, GTE-BBN, etc. Once you have that you can connect the T1,T3,OC3 whatever to your "core" router, the router that gives you connectivity to the internet.

5.You also need to register you domain, like mynet.net and get IP addresses either from the company you purchase your T1,T3,OC3, or from ARIN.

6. Now you need some infrastructure machines, like DNS servers, E-Mail servers, Radius Servers(To authenticate people as they dial into you ISP), you also need machines that will monitor you network and all of the machines. You will also need a few webservers and shell servers, if you plan on offering shell accounts or do webhosting.

7. Once you have the basic stuff detailed above, then you can pretty much start advertising and off you go.


Hope that helps.
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dserna earned 100 total points
ID: 2667422
From: dserna
                                         Date: Wednesday, March 29 2000 - 04:52PM PST

               How to build and ISP from the ground up? Well, it's not as easy as it seems. I work for an ISP and believe me when I say that it's not easy.

               1. Shop around for a few channelized T1's or  PRI's it depends how many customers you anticipate as having. A Channelized T1 is a T1 split up into 24 channels, each channel can
               support 1 call with a speed of up to 56K per second, a PRI is more for ISDN, but can be used for normal analog modems calling in as well. It supports up to 23 simultaneous calls. You
               can get a T1 or PRI pretty much from any local phone company, like PacBell in my area. The reason you need a T1 or PRI is so that you can hook it up to a terminal server like an
               Ascend Max TNT, Livingston Pertmaster, USR Total Control, Shiva Lan Rover, etc.

               2. So that brings me to my next point, you need to get yourself a terminal server, I named a few in #1. Once you have you terminal server and a circuit(T1 or PRI) then connect the
               circuit to the terminal server. The phone company will assign you a phone number with the circuit, so that when people call in, they connect to the terminal server

               3.What you want now are a few switches and routers. You need the switches to connect your network devices and routers to route traffic from your terminal server to the internet and
               vice-versa.

               4. Once you have that, then you have to get yourself an Internet connection, it could be a T1, T3, OC3, etc, depending on how much bandwidth you anticipate you may need. You can
               get a T1, T3, OC3, from companys such as MCI/Worldcom,CNC, Ziplink, GTE-BBN, etc. Once you have that you can connect the T1,T3,OC3 whatever to your "core" router, the router
               that gives you connectivity to the internet.

               5.You also need to register you domain, like mynet.net and get IP addresses either from the company you purchase your T1,T3,OC3, or from ARIN.

               6. Now you need some infrastructure machines, like DNS servers, E-Mail servers, Radius Servers(To authenticate people as they dial into you ISP), you also need machines that will
               monitor you network and all of the machines. You will also need a few webservers and shell servers, if you plan on offering shell accounts or do webhosting.

               7. Once you have the basic stuff detailed above, then you can pretty much start advertising and off you go.


               Hope that helps.
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Author Comment

by:clangl
ID: 2667448
That is fantasitic.  The only Question I have is when people dial into my ISP they will enter through the circuit?

Because I originally thought I would have a phone number and on my side I would have some sort of contraption that would let more that one person dial in on the same line.  Then If that filled up I'd get another phone number and another contraption.
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Expert Comment

by:dserna
ID: 2667490
Here is a rough step-by-step of what happens when a customer connects to and an ISP:

1.User hops on their PC and starts up Windows DUN.

2. Windows makes the modem dial the phone-number of the ISP(this is really the phone number of the PRI, or channelized T1) that is hooked up to the terminal server of the ISP.

3. The terminal server answers the call and authenticates the user.

4. Once the user is authenticated, the terminal server starts to route the user's traffic through itself to the core router, which has a T1, T3, OC3 hooked up which provides the connectivity to the Internet.

so once the user is connected the traffic goes like this:

modem(on users PC)
|
Public Phone system
|
terminal server
|
NIC on terminal server
|
Switch that terminal server is connected to.
|
Core router
|
T1,T3,OC3
|
Internet

As far as your second question, when a user dials into the terminal server, the terminal server can support a large amount of simultaneous calls, depending on how many T1's are connected to it, or PRI's. Once you fill up all the available channels on the terminal server, no one can connect, unless you add more capacity.

Hope that helps.
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Author Comment

by:clangl
ID: 2667501
Adjusted points from 50 to 100
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Author Comment

by:clangl
ID: 2667502
You just saved me so many Headaches.
Thank you very much!!!!!!!!!!!!!!!!!
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