HP EliteBook 840 G3 - Manual (Page 34)

To connect the modem to an analog telephone line that does not have an RJ-11 telephone jack, follow these
steps:
1. Plug the modem cable into the modem jack (1) on the computer.
2. Plug the modem cable into the modem cable adapter (2).
3. Plug the modem cable adapter (3) into the telephone wall jack.
24 Chapter 3 Network connections