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Network Transition

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by djdubuque 1 view

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I am been asked to transition our current 128kb ISDN network to a 500kb Satellite network. I?ve researched the company and they do not support a network connection. Only a single user anything larger would be on our hands. We are 25 strong and getting larger. I found that the ISDN with router is working better then a 500kb using Wingate or another proxy server. Any help out there on this?

Do they make a Satellite routers?

7 replies

by c:\\>

Try using a linux router. I had the same conversion to make from an ISDN Wingate connection to an ADSL connection. I have configured a linux box as a firewall/gateway, and averyone's happy.

The same thing can be done with a Win95 or Win NT machine with 2 network cards, one inside and one outside, and some route commands. Of course that would need either static IP adresses for the internal network, either a DHCP server. But if your ISDN network is already set up, just some route commands should do it.

On top of that, depending on the router provided by your satellite provider, maybe those routes can be added directly on it.

by phc

your have two question in one.

a/ how to connect many user to your internet connection

on this subject you can do several

1/ proxying (either on linux or NT/2000/98se)
note that w98se has a Internet Connectivity Sharing mechanism (check microsoft support website regarding ICS)

2/ network adress translation (NAT). It's much better, you need to buy and connect a small router (ethernet/ethernet between you "satellite box ethernet port" and your "nic"). assign the IP adress 192.168.0.1to the lan port of this router. and assign this IP adress as the "gateway IP adress" on all your workstation (you must use the adress range 192.168.0.x for all your workstations/servers).

b/ why satellite link is slower than ISDN

you must keep in mind that the latency of any IP packet going through a satellite link is longer than anything else.

The reason is that from your rooftop antenna you must go to the satellite and then back to the telco rooftop antenna.

knowing that the telecommucation satellites msut be at 36000 Km of altitude, your signal will have to travel at leat 72000km.

knowing that the speed of light is about 300000 km, the time needed send a packet to your ISP is 240ms (minimum)...

a very long time compared to 50ms on my adsl line (at home).

Then you face the quality of your ISP/Telco connectivity and potential surbooking !

I hope this answer was clear enough.

by rangehosting.us

The satellite services I've seen use either an internal card (proprietary Radio Shack/Compaq) or an USB connection (DishNetwork) to the sat. transciever - both are bi-directional. I would recommend the USB solution connected to a Windows 2000 Server(for the USB support) using the NAT built into RRAS. It works well with IP's assaigned from ISP side DCHP and has basic firewall features. If you have any questions e-mail me.

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