Can I install more than one etherSPLIT Wall Plate Splitter on the same line?
No. Each Wall Plate Splitter requires it’s own line and associated splitter on the closet end. In situations where wiring is looped in series from one room to another (typical in most homes and apartments), you can install only one Wall Plate Splitter. However, you can leave as many other phone line jacks on that same series as you require (with those jacks attached only to the wires carrying the phone signaling).