SoundStation Premier EX delivers the world's best full-duplex audio quality for any conferencing situation - it's the closest thing to handset audio quality. Polycom's full-duplex technology allows you to talk and listen at the same time, just as naturally as if you were in the same room - no clipping and no... More SoundStation Premier EX delivers the world's best full-duplex audio quality for any conferencing situation - it's the closest thing to handset audio quality. Polycom's full-duplex technology allows you to talk and listen at the same time, just as naturally as if you were in the same room - no clipping and no distortion like you get with ordinary speakerphones.The Polycom SoundStation Premier Satellite system adds a second powerful speaker to the one built into Polycom SoundStation Premier, to fill almost any size room with crystal clear sound. You can also get up to seven directional microphones for broader coverage. Featuring a modular, portable design, Polycom SoundStation Premier Satellite is easy to install and customize for the largest conference or boardrooms. Other features include convenient console connectivity for a standard analog phone line, an RCA jack that allows you to record calls, and an interface to connect a telephone handset for privacy.

The Soundstation Premier 550D for Avaya specifically uses Avaya Telephone Systems. Comes with two mics.

• Avaya Co-branded
• Noise reduction technology automatically minimizes PC, projector, and HVAC sounds
• Echo management feature reduces echo often associated with VoIP telephony
• LCD Display
• Full-Duplex Performance - simultaneous 2-way communication so everyone can hear and be heard clearly
• Hold with indicator
• Redial
• Flash key transfers calls or accesses call waiting feature
• Automatic Gain Control

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