Check the listing for details. Vtech Wireless Headset Adapter EHS101 Shortel Avaya Cisco Fanvil NEC Groundstrea. Color: Black, Condition: New. Listed at 9.00 USD. The Vtech Wireless Headset Adapter EHS101 is a sleek black device designed to allow users to connect their wireless headset to their home phone or VoIP system. With its wireless capabilities and compatibility with various brands like Avaya, Cisco, Fanvil, and NEC, this adapter provides flexibility and convenience for users looking to enhance their communication experience. The Vtech EHS101 model is an essential accessory for those seeking a seamless integration of their headset and home phone system.