Specifications: 1. This amazing adaptor converts the standard 3.5mm smartphone plug to an for Aastra RJ9, RJ10, or RJ22 handset plug, allowing you to use your favorite smartphone headset with your for Aastra office phone. 2. The adapter outputs binaural sound for stereo headsets, meaning you will hear sound out of both ears. 3. Convert 3.5mm OMTP smartphone plug to single 4P4C RJ9/RJ10 handset/headset plug. 4. This adapter will not work with for Apple EarPods and other CTIA based headsets. 5. Works best when paired with an amplifier. 6. For optimal use, please plug into the headset jack on your phone. The handset jack usually causes audio distortion. Compatibility: This list is not all inclusive. Incompatible Phones: Avaya 1100, 1200, 1600, 2000, 4600 and 9600 Series Cisco 7902, 7905, 7910, 7911, 7912, 7920, 7921 Nortel 1140T and Visa 350 Polycom Phones Shortel IP 230 Uniden Dect2088, TRU9496 Western Electric 6250 Compatible Phones: Aastra/Packet8/8x8 480e, 480i, 53i, 55i, 57i, 57iCT, 6753i, 6755i, 6757i, 9112i, 9133i, 9143i, 9480i Allworks 9212 AltiGen IP Phone 500, 510, 600, 705, 710, 720 Avaya 4500 Series IP ESI 48-Key IP Feature Phone and 48-Key Digital Feature Phone GE Model 2-9451 Inter-Tel Lucent 8410D Mitel IP 40XX, 41XX, 5000, 50XX, 5140, 52XX, 53XX, 5550 NEC Dterm Series E Norstar T7316E, M3904 Nortel IP 1120E IP, 1140E IP, 1150E IP, 1230, i2002 and i2004 Nortel Meridian Norstar Northern Telecom Panasonic Hybrid Plantronics T10 Possum Sero Shoretel ShorePhone IP Models Siemens Splicecom PCS 520 Talkswitch IP Phone, TS-600 Toshiba 3COM 3102, 3103 Compatible Amplifiers: Plantronics S-12, M22, A20, MX10, TSB, AP15 Package Includes: 1 x 3.5mm to RJ9 Cable
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