At 5:43 PM -0800 2/14/2009, Jonas Lopez wrote:
>DSL modem on POTS vs. Cable
>
>I did not have a Linksys 4 way splitter, but I did have two DSL 
>Modems-telcos, so I discovered you can just attach the phone cord to 
>ONLY ONE TELCO MODEM AT A TIME and it will work just fine.
>
>You must disconnect the phone cord in this room to use the other 
>modem in the other room - you can not have two phone MODEM 
>connections at the same time on the same line.

Correct.

POTS hasn't got enough bandwidth to support more than one standard 
dial-up modem (V.90) at a time.  If you're talking about an xDSL 
circuit over POTS -- same - the modem grabs all the bandwidth it has 
for the digital channel, minus just enough for a voice call.

>Since cable does not know who you are - no phone number etc.

Incorrect.  Before your data can be routed beyond a few hops, your 
cable modem requires "permission to talk".  It gains this when the 
CMTS (head end router) verifies the cable modem's MAC address against 
the list of modems authorized to your account (provisioned).  So the 
cable company knows *exactly* who you be.

>can you have two cable modems connected at the same time on the same 
>cable providing Cable DSL to two machines at the same time?

Yes.  You can hook up quite a few cable modems to your coax.  Each 
has to be provisioned by the cable company and they will charge your 
full price for each.  IOW, if cable internet service is $40, service 
for two modems would be $80, plus other fees.  To share your service 
between computers, what they really want you to do is to use a single 
modem and a NAT Router.

- Dan.
-- 
- Psychoceramic Emeritus; South Jersey, USA, Earth

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