Voistek U10 26716-01 Quick Disconnect QD to RJ Telephone Headset Adapter Cable Coiled for Plantronics Headset to Cisco 6941 9971 Office IP phones and Plantronics M10, M12, M22 & MX10 Amplifiers (PQDRJU10) This cable works with Plantronics M10, M12, M22 & MX10 Amplifiers and Cisco IP phone models : 6921, 6941, 6945, 6961, 7821, 7841, 7861 Cisco IP 7931G, 7940, 7940G, 7941, 7941G, 7942G, 7945, 7945G Cisco IP 7960, 7960G, 7961, 7961G, 7965G Cisco IP 7970, 7970G, 7971G, 7975G Cisco IP 8941, 8945, 8961, 9951, 9971. Works with Plantronics H/HW series. VXI P series, Smith Corona P Series, Starkey PL Series, The One Headsets Quick Disconnect allows you to disconnect from your headset without losing your call This is a Quick Disconnect Cable only, No Headset included in Package. DO NOT BUY THIS ITEM IF YOU DON'T HAVE ONE OF THE PHONE MODEL LISTED ABOVE. Not compatible with Cisco Spa phone series, CONTACT US FOR COMPATIBILITY GUIDE IF NEEDED.