HP LaserJet Enterprise MFP M725 series - Manual (Page 22)

Interface ports
1 Fax port
2 Foreign interface harness (for connecting third-party devices)
3 Local area network (LAN) Ethernet (RJ-45) network port
4 Hi-Speed USB 2.0 printing port
5 USB port for connecting external USB devices
8 Chapter 1 Product introduction ENWW