EHS compatible - The EHS electronic hookswitch capability is an alternate form of remote answering for select office telephones. The feature is built into the GN9120 EHS headset and allows you to use cables to answer and end calls remotely. This feature works with the office telephones and specified cables below.

• Avaya EHS1 cable - For use with Avaya 2420, 4610, 4620, 4620sw, 4621, 4621sw, 4622, 4622sw, 4625, 4625sw, 4630, 4630sw, 5420, and 5620 phones. (Item # 02-1000)
   
• Avaya EHS2 cable - For use with Avaya AV 2410, AV 5410, and AV 5610 phones. (Item # 02-1100)
   
• Avaya EHS3 cable - For use with Avaya 6408, 6416, and 6424 phones, including D and D+M models. (Item # 22432)
   
• Avaya EHS5 cable - For use with Avaya 9600 series phones. (Item # 02-1500)
   
• Cisco HHC EHS cable - For use with the following Cisco 7900G series phones manufactured after 9/2007: 7975G, 7965G, 7945G, 7962G, and 7942G. (Item # 14201-16)
   
• Polycom EHS cable - For use with Polycom SoundPoint IP 320, 330, 430, 550, 560, and 650 phones. (Item # 14201-17)
   
• Siemens EHS cable* - For use with Siemens Optipoint 410 IP (Advanced and Standard), Optipoint 500 (Basic, Standard, Advanced), and Optipoint 600 phones. *Requires Optipoint Acoustic adapter from Siemens, Item # 12085. (Item # 22450)