Amazon.com: Call Center Hands-Free RJ9 Headset Headphone Monaural Mic Mircrophone Noice Cancelling + Extra Cushions for Avaya Nortel Nt Yealink Ge Emerson Viop POE NEC Mitel Office Desktop IP Telephone Phone :
Avaya - Nortel Compatible Plantronics VoIP Wireless Headset Bundle | Electronic Remote Answerer (EHS) included | Polycom USB Phones: VVX250, VVX350, VVX450 | Avaya IP Phones: 1120E, 1140E, 1150E, 1165E (CS540-B-EHS-A)