modem adapter

My c7280 all in one fax came with a 2 to 4 wire adapter for the phone
connection. I think it is designed to adapt 4 wire phone wire to the
2 wire jack of the fax phone line. HP included their own 2 wire cable
that seems to reverse the connections of tip and ring. What is the
purpose of this reversal? My extra long 4 wire phone wire will only
work with the fax if it is connected through this adapter. Are faxes
wired differently from telephones?

HP is being nasty in not replacing my broken 2 to 4 wire adapter,
although my HP unit is still under the 1 year warranty. This wire
adapter is not shown in the accompanying HP documentation, but it
was included in the orginal box of accessories. HP will not honor
the warranty on this item. Makes me think twice about buying another
HP product. The HP provided phone wire is not long enough for me,
being 9 feet long. I need about 12 feet, hence the need for a
plain 2 wire phone cable and the adapter.

Sherwin

sherwin dubren wrote:
> My c7280 all in one fax came with a 2 to 4 wire adapter for the phone
> connection. I think it is designed to adapt 4 wire phone wire to the
> 2 wire jack of the fax phone line. HP included their own 2 wire cable
> that seems to reverse the connections of tip and ring. What is the
> purpose of this reversal? My extra long 4 wire phone wire will only
> work with the fax if it is connected through this adapter. Are faxes
> wired differently from telephones?
>
> HP is being nasty in not replacing my broken 2 to 4 wire adapter,
> although my HP unit is still under the 1 year warranty. This wire
> adapter is not shown in the accompanying HP documentation, but it
> was included in the orginal box of accessories. HP will not honor
> the warranty on this item. Makes me think twice about buying another
> HP product. The HP provided phone wire is not long enough for me,
> being 9 feet long. I need about 12 feet, hence the need for a
> plain 2 wire phone cable and the adapter.
>
> Sherwin

Hi,
Look at this http://tinyurl.com/blqpyg link. It's not for the C7200 series
but it describes what you need, I think. The HP two-to-four-wire adapter
provided by HP is simply a standard coupler that can be found for a couple
of dollars most anywhere that sells telephone accessories... Dean

Dean-MN wrote:
>
> Hi,
> Look at this http://tinyurl.com/blqpyg link. It's not for the C7200
> series but it describes what you need, I think. The HP two-to-four-wire
> adapter provided by HP is simply a standard coupler that can be found
> for a couple of dollars most anywhere that sells telephone
> accessories... Dean

Hi Dean,

I don't think an ordinary coupler will do the job.

The 2 to 4 wire adaptor that came with my HP broke apart. I noticed
then that this adaptor only had two contacts, red and green, but they
were swapped around going through the adaptor.

A coupler is nothing more than a straight through pin to pin
connection. I don't believe the wires are swapped inside it.
When I use either a standard 2 or 4 wire cable into the 1-LIne,
I get errors like "move the phone cable to ext jack". This of
course does not work either. My HP needs the tip and ring to
be reversed. You can get this on the 'special' phone cable that
HP sells. What a stupid design!

Sherwin