Compatibility
This headset comes with microphone amplification function. Why you need it?
Phones of brands Aastra Shoretel NEC Toshiba Inter-tel Mitel Digium are special which need amplification on headset microphone. Otherwise, headset microphone couldn't work, or the other end caller will complain your voice too soft.
For Mitel: 5000, 5001, 5005, 5010, 5020, 5021, 5040, 5055, 5140, 5201, 5205, 5207, 5210, 5212, 5215, 5220, 5224, 5230, 5234, 5235, 5240, 5250, 5304, 5310, 5312, 5320, 5324, 5330, 5340, 5360, 5540, 5550, 8520, 8528, 8560, 8568, 8600, Superconsole 1000, Superconsole 2000
Inter-Tel: 8520, 8560, 8600, 8620, 8622, 8662, 8690, ECX 1000, 2000
Aastra: 4222, 4223, 4424, 4225ip, 4422ip, 5446ip, 6735i, 6737i, 6739i, 9112i, 9116, 9133i, 9143i, 9216, 9316CW, 9417CW, 9480i, 9480i CT, 9617, Dialog 5446, i2004, 2002,6730i, 6731i, 6753i, 6755i, 6757i, 6757i CT, 53i, 55i, 57i, 470, 480i, 480e, 2465, 2564, M2216 (ACD I or ACD II), M3905, M4000, M4020, M7208, M7308, M7310, M7316, M7324, M7900, M8001, M8003, M9009, M9516
ShoreTel (Mitel): IP100, IP212K, IP230, IP230G, IP265, IP530, IP560, IP560G, IP565G, 565, 565G, IP655
Toshiba: DP5018-S, DP5022-SD, DP5023-SD, DP5032-SD, DP5122-SD, DP5131-SDL, DP5132-SD, DP5130, DPSX22-SD, DPSX32-SD, IP5022-SD, IP5122-SD, IP5131-SDL, IP5132-SD, IP5522-SD, IP5622-SDESI 40D. ESI 40, ESI 55, ESI 60D, 60 IP, ESI 48-Key IP Feature, 48-Key Digital Feature
Allworx: 9112, 9204, 9212, 9222 Verge IP 9308, 9312
Altigen: AT-500, AT-510, IP-600, IP-705, IP-710, IP-720, IP-8058x8 (Packet8) 6753i, 6755i, 6757i, 2118ST
Obihai 1032, 1062
Adtran IP335, IP430, IP450, IP550, IP560