Two cable modems, one router, connectivity problems

Two cable modems, one router, connectivity problems

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Subject Author Date
Two cable modems, one router, connectivity problems dacotahsky 12-03-2007
Posted by on December 3, 2007, 8:37 pm
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Hello,

I have two Ambit cable modems in my house. They are literally on top
of each other. There is only one cable connection coming into the
room. The cable company installed a splitter right behind my desk and
hooked up the two modems (one is residential use, the other a
commercial account). The modem belonging to the commercial account is
directly plugged into a separate business PC. My 'residential' modem
is plugged into a Linksys WRT54G wireless router and than to my
personal PC.

With this configuration, my personal PC will intermittently lose the
connection to the cable modem. Only by reseating (unplugging/
replugging) either power to modem, power to router or CAT5 cable will
it reconnect. I have tried two different routers of the same make,
resulting in the same problem. The commercial account never loses
connectivity. When I plug my personal PC directly into the cable
modem, I don't have any problems. At the same time, when the second
modem is unplugged (power) I can use the residential modem connected
to the router without any connectivity problems.

I have also tried switching the two modems to no avail. The modem
without the router stays connected while the router on the second
modem fails to communicate.

I have called Linksys and they changed some settings without
improvement. The cable provider has been out twice but there is
nothing wrong with the cable modems. I'm at a loss... Please help!

Thank you
ImLost

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other useful resources:
The Federal Communications Commission (FCC)
Telecommunications Industry Association
Electronic and Software Security Products and Services
International Telecommunication Union

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