RJ45 8P8C Inline Joiner – Roll-Over Crossover (Telephone Only)

You've got a legacy phone system where the transmit and receive pairs need to cross over, not run straight. This roll-over joiner handles that: pin 1 goes to pin 8, pin 2 to pin 7, and so on down the line. It's the old-school crossover wiring your PBX or key system expects. Straight to the point – this is not a network cable joiner. If you're trying to extend an Ethernet run, this won't do it. For a phone patch that needs the pairs flipped? Snap this in and you're done

• Crossover (roll-over) wiring: pin 1→8, 2→7, 3→6, 4→5, 5→4, 6→3, 7→2, 8→1
• Telephone configurations only – not suitable for network cables
• RJ45 8P8C socket-to-socket inline design
• Flips transmit and receive pairs for legacy phone systems
• Quick splice without re-terminating either cable end