Using two DSL modems

by **James S. Singleton** » Sun, 14 Nov 2004 01:58:47 GMT

	I have a DSL line at home, and five IP addresses reserved for me. I am
currently using only one IP address, but I have the need to start using at
least another. At the same time, I would like to have network access from
two different rooms at home. 

	I am aware that I could do this with a home LAN and a PC with two NICs,
but that's not what I want. What I want to know is, would it be possible
for me to have a PC connected to a DSL modem A, with IP address I1, and
another PC connected to a DSL modem B, with IP address I2? The DSL line is
the same in both cases.

	My feeling is that this can't be done, but I wonder if someone with far
better savvy than me could give me feedback?

by **Thomas Scheffler** » Sun, 14 Nov 2004 02:14:27 GMT

James S. Singleton schrieb:

There you have it: both modems would share/access the same frequency 
band which they can't. Before this issue isn't solved it does not matter 
if your provider allows you to login twice or not. So you need to have 
some kind of router that manages the public ip adresses for your local LAN.


Hope this info helps (I know it does not help the way you need)

Thomas

by **Toni** » Tue, 16 Nov 2004 05:47:22 GMT

First of all, I'm not a native english speaker, so, this message can include
gramatical and other errors :

As far as I know, a DSL line cannot be used at same time by two or more DSL
modem/routers, because of technical limitation.
Try to put your DSL router/modem on brigde mode, and then configure the
NIC's with the public IP's on LAN.


"James S. Singleton" < XXXX@XXXXX.COM > escribien el mensaje


>> I have a DSL line at home, and five IP addresses reserved for me. I am
>> currently using only one IP address, but I have the need to start using at
>> least another. At the same time, I would like to have network access from
>> two different rooms at home.
>>
>> I am aware that I could do this with a home LAN and a PC with two NICs,
>> but that's not what I want. What I want to know is, would it be possible
>> for me to have a PC connected to a DSL modem A, with IP address I1, and
>> another PC connected to a DSL modem B, with IP address I2? The DSL line is
>> the same in both cases.
>>
>> My feeling is that this can't be done, but I wonder if someone with far
>> better savvy than me could give me feedback?
>>
>>
>>

by **Tauno Voipio** » Tue, 16 Nov 2004 06:00:01 GMT



For two DSL modems you'll need two telephone lines. A DSL connection
will use all the capacity there is in the line (outside the normal
speech band).

Depending on the modem setup (bridged, routing, NAT) you may
succeed in branching the Ethernet line coming out of the modem
with a switch / hub.

You do not have an internal modem - I hope. With an internal modem
the only way is to route or NAT the network from the computer
with the modem.

Many external modems do have a multi-port Ethernet connection
(switch / hub). They usually also know to branch even a single
IP address to multiple computers at the local network.

The routed network is easier to firewall than multiple computers
with dircet connections to the Net. Please do not attempt to
run a DSL connection without a firewall, especially if there
are any Microsoft operating systems in the network. The active
content creeping from the Net is fast - a freshly installed
Windows 2000 was broken in in the time it took to load the
service pack from the Microsoft site.

HTH

-- 

Tauno Voipio
tauno voipio (at) iki fi

Using two DSL modems

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