Amazon.com: Plantronics CS540 VoIP Wireless Headset with Headband and Earwrap - On Ear Model - DECT Headset Compatible with Avaya IP Phones. GTW Bundle with Electronic Remote Answerer (EHS) Included : Office Products
Amazon.com: Wantek RJ9 Telephone Headset Mono with Noise Cancelling Mic, Quick Disconnect, Only for Plantronics M12 M22 MX10 Amplifiers or Cisco 7940 7942G 7945G 7960G 7975G 7821 7861 8841 8851 IP Phones(600QC1) : Electronics