Telephone Headset with Noise Cancelling Microphone, Mono Call Center Office Headset with RJ9 Jack & 3.5mm Connector for Landline Deskphone Cell Phone PC Laptop, Work for Polycom Avaya Nortel Aastra: Amazon.co.uk: Electronics
Headset for Aastra 6757i, 6771 IP, 6773 IP, 6775 IP, 6863i & 6865i IP Phone | eBay
Headset setup instruction for using EHS cable with Aastra Phones - 6753i, 6755i, 6757i, and 6757i
Office Headset with Noise Canceling Microphone, Mono Call Center Telephone Headset with RJ9 Jack & 3.5mm Connector for Landline Deskphone Cell Phone PC Laptop, Work for Polycom Avaya Nortel Aastra: Amazon.co.uk: Electronics