For two analog devices in series

The cable has two six-pin western connector, all six pins 1: 1 are connected.
In commercially available devices are all in the middle of the pins A1 / B1, the left and right next to the usually unused ports E / W. The two outermost pins (a2 / b2) are also connected.

Analog answering machines, fax machines, modems or NFN adapter usually require such 6x wired cable (6p6c), if an analog phone to be connected in series.

Note: This cable is not a digital DSL cable or the like. It is sufficiently well-made, but not quite as high as those of example Cables To Go, therefore only 4 stars.