This QD Cable is only compatible with Plantronics H-series headsets to the following telephones with a built-in amplifier. (NOT COMPATIBLE WITH CISCO 7942IP PHONE)
Nortel Networks (Northern Telecom)
Meridian PBX: M3903, M3904, M3905, M2216, M2008, M2616
Meridian Norstar: M7208, M7310, M7324, T7208, T7316, T7316E, M7900
Nortel 3903, 3904, 3905
Meridian Option M3110, 3310, 3820
i2002 (ip2002), i2004 (ip2004)
NT8B20, NT8B30, NT8B40, NT8B50, NTZK23AA, AB: (M2216):ACDI
NEC
Aspire Phone, 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
DTerm Series
Aspire
MITEL
Superset 4000 Series, Models 4015, 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
Siemens/ROLM
Optiset E Series with CA or HA option modules
Polycom
SoundPoint IP Phone Series, Models 300, 301, 430, 500 (rev. 5 or later), 501, 550, 600, 601. 650
General Electric
GE Telephone Model 2-9451, 2-9490
Toshiba
DKT-3001, DKT-3010S, DKT-3014SDL, DKT-3020S, DKT-3020SD, Strata CIX, DP5022-SD, DP5023-SD, DP5018-S, DP5000-series
AVAYA / Lucent
8403,8410D,8434DX,4406D+,4412D+,4424D+, 4424LD+,2410, 2420,4610, 4620, 4621,5410, 5420,5610,5620
INTEL-TEL
8520, 8560, 8600, 8620, 8660, 8662, 8690
Plantronics
A100, S10, S11, S12, S50, T10, T20, T50, T100, T110
ESI
48-Key IP Feature Phone, 48-Key Digital Feature Phone
Commander NT40
Commander NT Economy, Standard, Advantage, Principle