modem cable why some 2 pin some 4 pin

  Awestruck 11:32 27 Jan 2007
Locked

Why do some modems need 4 pin RJ11 cables and some will only work with 2 pin cables.

Awestruck

  Tick Tock 3 15:48 27 Jan 2007

Where does it say that.

  Gongoozler 16:26 27 Jan 2007

I've only ever come across 4-pin and 6-pin RJ11s, and for modems I've only seen the 4-pin variety.

  Taff™ 17:01 27 Jan 2007

click here and scroll down to the full/ or half duplex modes and read on.... as clear as mud but we`re getting there.

  Awestruck 21:13 27 Jan 2007

Thanks Taff.
As you say "as clear as mud".

Laptops seem to generally use 2 pin and desktops use 4 pin. However I could not connect a clients Dell desktop last week with 4 pin. It gave the 678 error message. I changed to a 2 pin and it worked.

I always carry both types of cable just in case, but I would love to know why there are two types.

Awestruck

  Taff™ 10:24 28 Jan 2007

The two types of cable are a pain. In general terms I`ve also found that American manufactured modems use the two pin too.

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