The Polycom VVX EM50 Expansion Module is easy to install and designed exclusively for the Polycom VVX 450 business IP phone, including matching look and feel. The VVX EM50 Expansion Module extends the functionality of your VVX 450 business IP phone with multifunctional line keys that can be set up as line registrations, call appearances, speed dials, direct stations and/or busy lamp field keys. Setup is fast and easy, as signalling and powering are provided by the VVX 450 host phone.
PoE: “Power over Ethernet”
PWR: “Power;” able to be plugged into an AC outlet
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