The Polycom EM50 Expansion Module is easy to install and designed exclusively for the Polycom VVX 450 business IP phone. It’s an optimal solution for telephone attendants, receptionists, administrative staff and other power users who manage multiple workflows or simultaneous calls on a daily basis. The Polycom EM50 Expansion Module extends the functionality of your Polycom 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. When fully equipped, the VVX 450 business IP phone functions as a high-performance attendant console that can support up to two VVX EM50s. Telephone attendants can reduce the number of lost customer calls, shorten transaction times and increase the accuracy of call routing by promptly accepting, accurately screening, efficiently dispatching and effortlessly monitoring calls. The VVX EM50 is an easy plug-and-play device that requires no setup, as power and signaling are provided by the host VVX 450 business IP phone. Like all Polycom VoIP products, the VVX EM50 is standards-based and fully interoperable with Polycom partners' IP telephony server solutions.