RJ45MF-RS232-CO | RJ45 RS232 Serial Crossover Adapter | ITM Components
CERRXIAN RJ45 Ethernet Crossover Adapter, CAT6 Ethernet Male to Female Adapter, Used to Protect the Device's Native Jack (Straight): Amazon.co.uk: Computers & Accessories
RJ45 Crossover Adapter Cat.5e STP/UTP - from LINDY UK
Crossover Cable Vs. Straight-Through Ethernet Cable: What's the Difference? | CWS Blog