Wireless mics/ expansion speakerphones/headsets VTech ErisStation Conference Phones Connectivity Analog (PSTN) SIP USB Bluetooth DECT 6.0 Audio Full Duplex Echo Canceller Noise Reduction Codecs Wideband Functionality PoE SIP Lines/Accounts SIP Softkeys Navigational Pad Phonebook WebUI for Phonebook Management Redial Distributed Mute Access Date and Time Speed Dial Keys USB for PC Softphone/Speakerphone Bluetooth Connectivity for Headset and Mobile Pairing Wireless Expansion Microphones Wireless Microphones Integrated Charging Bays Other Standard Warranty VCS702 VCS704 VCS754 VCS752 VCS850 P Wireless mics Wireless mics Wireless mics Pair up to 3 per VCS752 P P P P P P P P P P P P P P P P P P G.711, G.722, G.726, G.729ab G.711, G.722, G.726, G.729ab P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P P 2 3 3 3 3 Up to 3 3 6 6 3 2 4 4 2 2 years 2 years 2 years 2 years 2 years (Expansion speakerphone accessory to VCS752) 22 Conference Rooms and Meeting Spaces