Cisco phone Call Center Headset with Noise Cancellation
MAIRDI Office Headset with RJ9 Jack for Cisco Phone, Binaural Telephone Headset with Mic Noise Cancelling for Call Center Landline Deskphone, Including 3.5mm Connector for Cell Phone PC Laptop : Amazon.co.uk: Electronics
Headsets for Cisco 8800 IP Phones - 8811-8851-8861-8865 – Headsets4business