SUNDELY&reg; Call Center Telephone /IP Phone Headset with Adjustable Boom Mic 4-pin RJ9 Modular Connector for 3Com Aastra Alcatel-Lucent AltiGen Ascom AVAYA Cable & Wireless Cisco (CIS) Comdial Commander Doro/Audioline Ericsson ESI Call Center Customer Service Single Ear Telephone IP Phone Headset Headphone 4-pin RJ9 Modular Connector, Adjustable Boom Mic 3Com 3102, 3103, Aastra 2564, 2465, 480, 480e, 480i, 53i, 55i, 57i, 57iCT, 6753i, 6755i, 6757i, 9112i, 9133i, 9143i, 9480i, M4000, M4020, M5208, M5209, M5216, M5317, M7900, M8001, M8003, M9009, M9516, i2002, i2004, i2004IP Alcatel-Lucent 4004, 4020, 4022, 4035, 4037, AltiGen 500, 510, 600, 705, 710, 720, Ascom Berkshire 200, 400, 600, 800, SD30, MR30, MR51, MR61, AVAYA / Lucent 2410, 2420, 4406D+, 4412D+, 4424D+, 4424LD+, 4610, 4620, 4621 5410, 5420, 5610, 5620, 6402D, 6408D+, 6416D+M, 6424D+M, 8403, 8434DX, DT1, DT3, DT5, Cable & Wireless CWB 100H, CWB 200H, CWB 500, CWB 600, Cisco LCAP-118: 7961, 7962, 7965 Comdial 8312, 8412, Commander NT40 NT Economy, Standard, Advantage, Principle, Doro/Audioline AUB3MW, AUB6MW, AL505, Casino, Congress 100, 200, X50, Sim 200, Sensor 500, TEL15HS, Ericsson Dialogue 4147, Dialogue 4186, MD110, ESI ESI-48-Key IP Feature Phone and 48-Key Digital Feature Phones