The SoundStation Polycom IP 7000 conference Phone is an advance conference phone that provides outstanding performance and healthy abilities for SIP-based VoIP platforms. Perfect for boardrooms, auditoriums, conference rooms and executive offices, the Polycom SoundStation IP 7000 Conference Phone is the most advanced and elastic conference phone ever developed. Attach 2 units together or add optional expansion microphones for improved room coverage and voice pickup. Connect the Polycom SoundStation IP 7000 to a Polycom HDX video conferencing system for a complete, combined voice and video conferencing solution.