Use Power over Ethernet (PoE) for network and power source connections to connect your Polycom SoundPoint IP 335 phone, unless otherwise directed by your System Administrator.
The AC power adapter is a separate, optional accessory from Polycom. Your System Administrator will provide one if necessary.
Power over Ethernet (PoE)
Using a regular CAT5 cable (optional accessory from Polycom), the phone can be powered from a PoE (IEEE 802.3af) compliant switch or hub.
Connect Polycom 335 using a PoE source.
Plug the supplied network cable between the LAN jack on the phone and an available power and data port on the in-line power switch.

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