Fivetech Corded Headset w/ Noise Canceling Mic for NEC Aspire Dterm Nortel Norstar Meridian Plantronics Polycom ShoreTel Siemens ROLM Toshiba Zultys Packet8 SEE COMPATIBLE PHONE LIST IN DESCRIPTION. Direct connect landline telephone headsets suitable for SOME SPECIFIC MODELS from NEC Aspire Dterm Nortel Norstar Meridian Plantronics Polycom ShoreTel Siemens ROLM Alcatel-Lucent:4004 4020 4022 Allworx:IP 9112 9204 9212 AltiGen:600 705 710720 Ascom:800 SD30 MR30 51 AVAYA/Lucent:4406D+ 4412D+ 1120 1140 1165 1210 1220 1416 3904 5420 5610 5620 4612 4620 4625 4625W 4630 Comdial:8312 8412 Digium:D40 D45 D50 D70 Plantronics:T50 T100 T110 SP-02 PLX-400 PLX-500 and MiVoice:5312 5320 5320e 5324 5330e 5340e 53608568 6730a 6730a Adtran:IP321 331 430 650 670 and Gigaset:DE310 DE410 DE700IP DE900IP InterTel:8660 8662 8690 Mitel:5000 5010 5020 5040 5055 5250 5312 5324 5330 5340 5550 SuperSet 4015 4025 Toshiba Zultys Packet8.Aastra:2465 2564 480 51i 53i i733 1120e 1140e 1150e i2002 IP i2004 Phase 6751i 6753i 6755i 6757i 6757i CT 7446i 9112i 9133i 4223 4224 M4020 M5208 M5209 M5216 i2002 i2004 i2004