Testing the "in-house" connections
The modem should be the very first device connected to the
Any devices that might present a "load" (interference)
to the phone line need to be removed. These items include:
Caller ID boxes;
Digital cable set-top boxes;
and anything else that uses a phoneline. Any or all of these
have a ring detector circuit that is capable of creating waveform
distortion and trashing the attempts of the adaptive equalizer
of the modem to obtain a flat frequency response. Note that these
types of devices must be disconnected and not just powered
off as the ring detector affects the circuit regardless
of whether the device is powered on.
Secondly, if necessary, disconnect ALL telephone devices from
your entire home or apartment. Another phone in the house connected
to the same phone line is able to introduce interference if it
is not working properly.
Now if you are still having problems, the diagnosing gets a
little more complicated. The next step is to remove the phone
jack from the wall that the modem connects to and make sure that
the wires are snuggly connnected and the exposed copper of the
wires are not touching each other. If checking the modem's phone
jack does not solve the problem, then you need to check every
phone jack in your house or apartment the same way.
If all of the phone jacks look good, the only thing left to
test is the wires in the walls themselves. The way to do this
is, unfortunately, even more complex. If you are not ready to
give up and call the phone company, then go to this article
which tells you how to do it.
If the wires in your house test clean
Now that you tested the wires, if there is still a problem,
it is most likely a phone company related issue. Call them up
and give them grief. Beware! If they say they will need to come
out to your house to test the lines, and they find something wrong
with the wiring (that you missed), they will most likely charge
you for the service call.
Luck with the troubleshooting, and we wish you many high speed
The Hyperconnections Team