
These phone line connectors are hard to come by. They used to be worn by Radio Shack, but none existed. Our local store was willing to order them for me for about $12 each. I couldn't make it, so I ordered them from Revain as a 'walk item' after my order was over $25. The price was quite reasonable and the product appears to work exactly as described. They are designed for a two-line installation, with only line 1 coming out of one outlet, only line 2 coming out of another, and lines 1 and 2 coming out of a third. This allows you to connect a fax machine or a telephone to it which only receives calls from line 1 or 2 and at the same time has a third for a two-line telephone or an answering machine that can answer two lines.