Voistek Corded Call Center Telephone Headset RJ9 Headphone with Mic Noise Cancelling for Aastra Polycom Mitel Office Landline Phones and Call Center (Binaural K20)

New K20 (Binaural, two ear) direct connect headsets with noise-canceling are ideal for Most Standard Telephones Equipped with Modular RJ Headset Port. You can plug them directly into your headset-ready telephones or into the handset port if your phone do not include the headset port function.

Part of compatible phones:
Aastra
2465,2564,480e,480i,53i,55i,57i,57iCT,6753i,6755i,6757i,
9112i,9133i,9143i,9480i
M4000,M4020,M5208,M5209,M5216,M5317,
M7900,M8001,M8003,M9009,M9516,
Powertouch 480/480e/480i Telephones
I2002,i2004,i2004IP(not compatible with i2400 phase ll and i2004 POE phones)

Polycom
SoundPoint IP Phone Series,Models 300,500(Rev.5 or Later),550,600,650,Polycom IP 300,IP301,IP430,IP450,
IP500,IP501,IP600 & IP 601 IP Phones

Mitel
Superset 4000 series,Models4015,4025,4125,4150
Mitel IP Series,Models 5000 IP,5010,5020,5020i,5040i,
5050,5055 IP,5055 SIP,5140,5201,5207 IP,5210 IP,5212,5215,5220,5224,5230,5235,5240,5550 IP

NEC
Electra Elite DTerm,Series E,Models DTU-8,DTU-8D,DTU-16,DTU-16D,DTU-32,DTU-32D,DPT-8,DPT-8D,
DPT-16,DPT-16D,DPT-32,DPT-32D,DTH-8,DTH-8D,DTH-16,DTH-16D,DTH-32,DTH-32D,Dterms Series i,
Aspire,NEC DT310,DT330,DT700,DT730,DT750 IP Phones
DSX,DTL,DTP,DTR,DTU Series Phones

Nortel Networks(Northern Telecom)
Meridian PBXM3903 M3904,M3905,M2216,M2008,M2616,Meridian NorstarM7208,M7310,M7324,T7208,T7316,T7316E
M7900,M9516,M9009,Nortel 3903,3904,3905,Meridian Option M3110,3310,3820 BT Converse 220,225,300,320,325,420,
425,1100,1200,1300,1400,Paragon 450 I2002,i2004(Not compatible with i2400 phase II and i2004 POE phones)
1210,1220,1230,2465,2564,NT8B20,NT8B30,NT8B40,NT8B50,NTZK23AA,AB(M2216)ACDI

Orchid
DBT 2000,DBT 3000