Amazon.com: Mono Call Center Headset Headphone with Mic for Cisco Unified Telephone IP Phones 7940 7941 7942 7945 7960 7961 7962 7965 7970 and Plantronics M10 MX10 Vista Modular Adapters : Electronics
Plantronics M10
Plantronics MX10 Headset Switcher | eBay
Wantek Call Center Telephone Headset, RJ11 Headsets with Noise Cancelling Mic for Plantronics M22 MX10 Vista Modular Adapters
Amazon.com: Wantek Corded Telephone RJ9 Headset Monaural with Noise Canceling Microphone for Call Center Telephone Systems with Plantronics M10 M12 M22 MX10 Amplifiers or Cisco 7942 7971 Office IP Phones(F600C1) : Electronics