Polycom phones (VVX 400/410, VVX500, VVX600):
Wired:
Polycom IP Phone Headset with RJ9 Quick Disconnect Cord for Call Center
Wireless:
Plantronics CS540 Office Wireless Headset
Plantronics CS510 Wireless Headset, Monaural Headset
Bluetooth:
Jabra Pro 925 Bluetooth Wireless Headset 925-15-508-185
Mitel phones (6867, 6869, 6873):
Wired:
Jabra Biz 2400 II QD Mono NCJabra GN2125 Duo, Noise Canceling
Wireless:
JABRA PRO 9450 MONO FLEX
Jabra Pro 920 Duo
Plantronics CS540 Office Wireless Headset
Bluetooth:
Plantronics Voyager Legend CS (make sure it includes a USB dongle)
Aastra phones (6735, 6755, 6757, 6737):
Wired:
ENCOREPRO 510/520
Plantronics PW251 Polaris SupraPlus Wideband VoiceTube Headset
Wireless:
Plantronics CS540 Office Wireless Headset
Jabra Pro 920 Mono Wireless Headset System