
next day delivery and works very well. I only used splitters, no couplers. I had to split cat6 into 2 different strings and that helped. They have a speed of 10/100 instead of 1000, but that is normal for Internet access. If this applies to a private LAN, you might want to reconsider whether 10/100 is an appropriate speed. This separates 1236 and 4578. But it connects 4578 to its own 1236, so you have a pair of 1236 (port A) and 1236 (port B), making everything work on both ends. You don't have to cross wires. I have data/POE on side A and audio works on band B. Very happy.