HP LaserJet Pro 300 Color MFP M375 - Manual (Page 24)

Interface ports
1 Telephone “line out” port for attaching an extension phone, answering machine, or other device
2 Fax “line in” port for attaching fax line to product
3 Network port
4 Hi-Speed USB 2.0 port
8 Chapter 1 Product basics ENWW