Compatible Telephone List :
Panasonic: KX-NT136, KX-NT343, KX-NT346, KX-NT366,KX-T 7603, KX-T7625, KX-T7630, KX-T7633, KX-T7636, KX-T7730, KX-T7735, KX-TS880 AT&T:SL82418,SL82318,SL82118,SL80108,SB67158,SB67148,SB67138,SB67118,SB67108,TL70008,E5924B,CL82350,CL80109,ML17928,ML17959,ML17939,ML17929,ML993 ,992,984,E5945
Cisco: 7985 Unified IP phones
Cisco SPA: 303,501G,502G,504G,508G,509G,525G,512G,514G,525G2
Cisco Linksys: CIT200, CIT300, CIT310, CIT400 SPA921, SPA922, SPA941,SPA942, SPA962
Polycom: IP320, IP321, IP330, IP331, SoundPoint Pro SE-220 SE-225
Grandstream:GXP-2010, GXP-2020, GXP-2100, GXP-2110, GXP-2120,GXP-280, GXP-285,BT200, BT201 GXP-2000