No, Cat 6 is designed for Ethernet and does not support telephone networks.
No, Cat 6 is designed for Ethernet and does not support telephone networks.
Your setup allows flexibility with the right adapters. Yes, you can connect the RJ-11 from the router to the RJ-45 in the bedroom and link it to the living room’s RJ-45 port. From there, an RJ-11 cable can reach your telephone. You’ll need compatible adapters for each connection, which you can purchase from electronics or networking supply stores.
Using an RJ-11 connector into an RJ-45 port might harm the port. Look for adapters (RJ-11 to RJ-45) instead. Generally, a Cat 6 cable offers superior shielding compared to what a phone requires. That part should be safe. Ultimately, a cable is just wires, and they don’t depend on signal type. The main concern lies in their shielding against interference. Your phone doesn’t need shielded cables, but it won’t matter if they are. Conversely, an unshielded cable would pose a far greater risk (such as transmitting ≥1 Gbps).
Shielding becomes essential mainly for extended cables or when they're placed alongside mains wiring/outdoor environments to block inductive currents and RFI interference. You can transmit 10Gbit using unshielded cable without issues, and CAT6a is available in unshielded twisted pair form. The main factor affecting a cable's capacity isn't shielding per se, but the wire gauge and twist count. As you increase data speeds on Ethernet, these requirements rise. A CAT3 cable suited for phones may struggle with 100Mbit Ethernet, whereas a CAT6 is built to handle it better, reducing noise risk even if some DSL cables skip twists to cut costs.