 | Author: M. Pallaver (Brighton, M.. | I bought this by mistake and had to do some research, so for everyone else, the telephone models which are known to be compatible with this direct-connect A10 cable and H-series headset (no amplifier) are as follows:Northern Telecom (Nortel, Norstar, Meridian, IP Phones): Model Numbers: 1120E IP, 1140E IP, 1150E IP, i2002 (ip2002), i2004 (ip2004), M3903, M3904, M3905, M7208, T7208, M7308, M7310, M7316, T7316, M7324, M7900, M9516, M9009, NT8B20, NT8B30, NT8B40, NT8B50, NTZK23AA, AB: (M2216):ACDI, Vista Powertouch 480, 480e, 480i NEC: 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 Dterm Series i AspireToshiba: MUST HAVE TOSHIBA "BHEU ADAPTER" (sold by Toshiba, not available through this site) to use a Polaris headset with the following Toshiba model numbers: DKT 3001,...Read more | 9 |