Cisco Phone Compatibility (Included but not limited):
Cisco 12 VIP, Cisco 30 VIP, Cisco 6841, 6851, 6921, 6921, 6945, 6961, 7821, 7841, 7861, Cisco 7931G, 7940, 7940G, 7941, 7941G, 7942G, 7945, 7945G, 7960, 7960G, 7961, 7961G, 7962G, 7965G, 7970, 7970G, 7971, 7971G, 7975, 7975G, 8811, 8841, 8845, 8851, 8861, 8865, 8941, 8945, 8945G, 8961, 9951, 9971
Note: This RJ9 telephone headset ONLY Compatible with Cisco Phones already with RJ9 Headset Jack!
IT DOES NOT WORK ON CISCO SPA SERIES PHONES !!!