C125 to RD418HD

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum tdreesman,

Based upon the symptoms reported, it would appear that you have a faulty SeaTalkhs Crossover Coupler. That said, as the Ethernet sockets of Raymarine's currently manufactured products support auto-sensing, it is not necessary to install a SeaTalkhs Crossover Coupler or network switch when interfacing two such products to one another. Accordingly, Digital Radar Cables packaged with Raymarine's currently manufactured radomes and open array pedestals are terminated with a RayNet (F) plug instead of a RJ45 (M) plug as did older Digital Radar Cables. Should your Digital Radar Cable be terminated with a RJ45 (M) plug, then this plug may be mated to any of the following:
- R32142 RJ45 (F) to RJ45 (F) Waterproof Inline Coupler
- E55060 SeaTalkhs Crossover Coupler
- SeaTalkhs Network Switch (retired)
- SR6 Sirius Satellite Weather/Radio Receiver / Network Switch
- A80247 RayNet (F) to RJ45 (F) Adapter