Sonos Multi-Room Music System - Manual (Page 18)

Chapter 2: System Setup
2-3
http://faq.sonos.com/norouter for instructions.
• If you have structured (built-in) wiring that connects to a router located
elsewhere in your home, you can connect from a live wall plate to any of the
Ethernet switch connectors on the back of a Sonos component.
Setup illustrations (into router)