Compatible Phone List (Include but not limited):Plantronics: A100 S10, S11, S12, S50, T10, T20, T50, T100, T110, SP-02, SP-04, SP-05, A100, T50, T100, PLX-400, PLX-500Polycom: SoundPoint 300 301 335 430 450 500 (rev. E or later) 501 550 600 601 650 670 CX300 CX500 CX600 CX700 VVX300 VVX310 VVX400 VVX410 VVX500 VVX600 VVX1500 with a dedicated headset jackAVAYA / Lucent: 6402D, 6408D+, 6416D+M, 6424D+M, 8403, 8410D, 8434DX, 4406D+, 4412D+, 4424D+, 4424LD+, 1120, 1140, 1165, 1210, 1220, 1230, 1408, 1416, 2410, 2420, 4610, 4610SW, 4612, 4620, 4620SW, 4621, 4621SW, 4622, 4622SW, 4625, 4625W, 4630, 4630SW, 5410, 5420, 5610, 5620, 5621, 5625, 9404, 9406, 9408, 9504, 9508, DT1, DT3, DT5, QE4610NEC: Electra Elite IPK Dterm Series E models DTU-8, DTU-8D, DTU-16, DTU-16D, DTU-32, DTU-32D, DTP-8, DTP-8D, DTP-16, DTP-16D, DTP-32, DTP-32D, DTH-8, DTH-8D, DTH-16, DTH-16D, DTH-32, DTH-32D, DT300, DT310, DT330, DT700, DT730, DT750, Dterm Series i DSX DTL DTP DTR DTU SERIES PHONES AspireAastra: 2465 2564 480 480e 480i 51i 53i 55i 57i 57iCT 554 564 565 i733 1120e 1140e 1150e 1210 1220 1230 i2002 i2004 i2004 IP i2004 Phase II i2052 7406 8540 9617 6730i 6731i 6739i 6751i 6753i 6755i 6757i 6757i CT 7446i 9112i 9133i 9116 9143i 9480i M2216 (ACD I or ACD II) M3905 M4000 M4020 M7208 M7308 M7310 M7316 M7324 M4000 M4020 M5208 M5209 M5216 M5317 M7900 M8001 M8003 M9009 M9516 Powertouch 480 480e 480i Telephones i2002 i2004 i2004 IP (not compatible with i2400 phase II and i2004 POE phones) Dialog 4222 4223 4224 4225Northern Telecom (Nortel Norstar Meridian IP Phones): 1120E IP 1140E IP 1150E IP i2002 (ip2002) i2004 (ip2004 (not compatible with i2400 phase II and i2004 POE phones) 12101220 1230 2465 2564 M2008 M2216 M2616 M3903 M3904 M3905 M7208 T7208 M7308 M7310 M7316 T7316 T7316E M7324 M7900 M8001 M8003 M9516 M9009 NT8B20 NT8B30 NT8B40 NT8B50ShoreTel: IP100 IP212 IP212K IP230 IP265 IP530 IP560 IP560G IP565 IP565G IP655 420 480 480G 485Mitel: 5000 5010 5020 5040 5055 5140 5201 5205 5207 5210 5212 5215 5220 5224 5230 5235 5240 5250 5312 5324 5330 5340 5550 SuperSet 4015 4025 4125 4150MiVoice: 5312, 5320, 5320e, 5324, 5330e, 5340e, 5360 4222, 4223, 4224, 4225, 5370, 5380, 8528, 8568 6730a, 6730aToshiba: DKT-3001 DKT-3010S DKT-3014SDL DKT-3020S DKT-3020SD (MUST HAVE TOSHIBABHEU ADAPTER for on hook answeringsold by Toshibanot available from us) Strata CIX DP5022F-SD DP5023-SD DP5018-S DP5000-SeriesPacket8 Phones: 6753i 6755i 6757i Alcatel-Lucent: 4004 4020 4022 4035 4037 Digium: D40 D45 D50 D70Inter-Tel (InterTel): 8520 8560 8600 8620 8660 8662 8690 Allworx: IP 9112 9204 9212 9222 9224Gigaset: DE310 DE410 DE700IP DE900IP Ascom: Berkshire 200 400 600 800 SD30 MR30 MR51 MR61Zultys: ZIP 59i 55i 53i 30is AltiGen: 500 510 600 705 710 720 Comdial: 8312 8412 Adtran: IP321 331 430 650 670