Fivetech Noise Canceling Headset with Mute | Avaya IP Phones 1608, 1616, 9601, 9608, 9610, 9611, 9611G, 9620, 9620C, 9620L, 9621, 9630, 9640, 9640G, 9641, 9650, 9650C, 9670 &hellip; The Headset not work with CJSCO IP All telephone Works for AVAYA 1608 1616 9608G 9611G 9620 9630 9641G... or CISCO 7902 7905 ...7912 or Grandsteam GXP 14xx ...GXV 3275 or YEALINK T19P...T48G SNOM 300...821 Panasonic KXT and MORE DESKPHONES LISTED IN DESCRIPTION. WORKS ONLY FOR THE SPECIFIC PHONE MODELS LISTED IN DESCRIPTION. FOR OTHER PHONE MODELS, PLS SEARCH: ARAMA TELEPHONE HEADSET FOR MORE OPTIONS OR CONTACT US FOR COMPATIBILITY GUIDE. Compatiblity(Only compatible with telephones with a built-in amplifier. Some other specific Avaya 9608 9610 9611 9611G SNOM 320 360 370 720 760 With Mic Mute & Volume Control built in.