CAB-M12DM4-RJ45 - Industrial IP67 M12 4 pin threaded Amphenol connector cable for LAN (ITP switches)
totally thought I knew what it was when someone asked what kind of connector it was. turns out it's about 30% smaller than an rj45... 3/4"L x 3/8" W x 1/4" H.
Delock RJ45 Port Doubler 1 x RJ45 apa > 2 x RJ45 anya (2 x ISDN) - eMAG.hu
Hálózati kábel csatlakozó kábel M12 az RJ45 patch kábel 4pin hálózati kábel Ipari Ethernet alkalmazásokhoz IP67 – FIXO.hu
M12 to RJ45 Connector Adapter M12 4 Pin Straight Male to RJ45 Female Socket - Renhotecpro.com