Linksys Cisco SPA Compatible Jabra 1920 VoIP Direct Connect Headset Bundle (Headset and Cisco SPA Telephone Interface cable) - SPA Series Cisco (501G, 502G, 504G, 508G, 509G, 512G, 514G, 525G2, 921, 922, 941, 942, 962) BUNDLE OF 2 ITEMS: Jabra BIZ1920 Headset and Linksys Cisco 2.5mm Telephone Interface cable (Cisco compatible) PLUG-IN 2.5MM WITH QUICK DISCONNECT: Allows for easy disconnect from phone without removing headset COMFORTABLE PILLOW SOFT EAR CUSHIONS: Soft Leatherette Ear cushion JABRA SOUND QUALITY: Noise-canceling microphone filters out background noise GLOBAL TECK GUARANTEE: 100% Happiness Guarantee to be compatible with the mentioned Cisco phones. Unlike other big box retailers that offer little or no support we offer friendly, Virgina-based, support agents to help you if you have compatibility questions.