The Nortel M Series Gray Amplified Handset Is Compatible With:  M2000 (M2006, M2008, M2616) M5000 (M5008, M5009, M5112, M5212, M5208, M5216, M5312, M5316) M7000 (M7100, M7208, M7310, M7324) M8000 (M8001, M8003, M8004, M8009, M8314, M8417) M9000 (M9216, M9316, M9316CW, M9417, M9417CW)