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networking 3 PCs via ISDN

Posted on 2004-03-30
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Last Modified: 2010-03-18
Hi
I have 3 Pcs in remote diff. cities and want to make network between these 3 Pcs via telephone lines (ISDN) to enable  running acc. App.
What's the best way to accomplish that with best speed , and what are the software & hardware required ?
i think this need dial-up server, but i dont how to do that and whether all the 3 Pcs must have dial-up server or only one?

Any suggestions or comments are appreciated.

thanks in advance

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Question by:user_
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Expert Comment

by:Rich Weissler
ID: 10727968
(Sorry about the relatively quick answer.)
Depending on what is available in each city, your best solution may change.  Assuming you are in relatively developed areas, my default answer would be to select the most technically savy location, or the location with the most reliable internet connection to install RRAS as the "remote access server", and have each of the other two sites connect to their local ISP, and use L2TP to establish a VPN back to the RRAS server.

Hardware: Local connection hardware depending on the local possible ISPs -- ISDN or DSL or cable modem as available.
RRAS server: Pentium II or better, 256MB RAM or better,
Software: Built into the modern versions of Windows.  The RRAS server should be Windows 2000.
(I'm assuming you were leaning in that direction because you posted this to the Windows Networking area.)
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Author Comment

by:user_
ID: 10730052
hello Razmus,

all the 3 Pcs have their own ISDN line and running w2k ,

"each of the other two sites connect to their local ISP" do u mean to dial specific Tel No. or the RRAS Tel No. ?
I don’t want using internet as joining point
Also I am new to ISDN technology I was familiar with cable modem.
Can u plz explain with more detail.

Thanks
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Accepted Solution

by:
Rich Weissler earned 70 total points
ID: 10734838
You don't want to use the Internet.  That changes, and complicates things... and likely makes things expensive.

When I was referring to connecting to thier local ISP, I was referring to an internet service provider which would make you a node into the Internet.  You can try calling from one city into another city, and this might work using ISDN terminal adapters, but there are a number of things which can go wrong between sites (and when I was looking at long distance with ISDN many years ago, the cost was prohibitive.  I have local ISDN in my home network now, and have a fixed monthly fee... but can only call within my local exchange, and realistically, since no one else has ISDN, it means I only call my ISP.)

Conceptually using ISDN Terminal Adapter should be similar to calling with a modem.  Don't think about what you know about cable modems when looking at your ISDN; think a digital equivalent of analog modem technology.  You can have each of the "remote" locations dial into a single system which would have two connections in.  Do each of the sites currently have Basic Rate ISDN (BRI)?  In that case you can have each of the remote sites connect with a single channel into one location... otherwise the "server" would need two BRI lines.  
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Author Comment

by:user_
ID: 10747847
is there any speed diff. in using modem or ISDN to connect between 2 Pcs ? i think ISDN is double the modem . ( I choose ISDN to gain extra speed )
ok , suppose that line is normal cable modem , so i need tow line (tow modem) in the server and have each of another Pcs to dial these server lines to complete the network, is this work well ? and any other solution ?  ( is the  dial-up server will work with 2 modem).

Thanks
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Author Comment

by:user_
ID: 10772021
many thanks Razmus for your valuble comment,
i will close this Q and accept your comment as answer.
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