I am currently looking for the correct terminology for purchasing RJ Splitters. It appears you can purchase both a straight through splitter in which all 3 female ports are connected in parallel (pin 1,2,3,4… on Female port 1 is connected to pin 1,2,3,4… on female port 2 & 3). You can also purchase a phone line splitter that is used for a phone line that has 2 separate lines. Line 1 is on pin 1/2 and line 2 is on pin 3/4. In the line splitter the wires from female port 1 to female port 2 are not the same connection points as female port 1 to female port 3 (pin 1&2 on Female port 1 go to pin 1&2 on port 2. Pin 3&4 on Female port 1 go to pin 1&2 on female port 3).
Actual pin numbers may vary based on the connector, but what I am searching for is a way to ensure I am getting a straight parallel connection for my splitter, and not a cross over type connection.
Terminology seems to be inconstant throughout the internet and through different retailers.