Compatible with:
ATCOM: R4,R3,R2,R1, AT840,AT820,AT810,AT800
Digium: D40, D50, D70
Fanvil: C68 ,C66,C62, C58P, C58,X3/X3G, X5/X5G, C01
Polycom: CX100,CX200,CX300,CX500,CX60, SoundPoint: 301,335,400,430, 450, 500 (rev. E or later), 501, 550, 560, 601, 650, 670
Snom: 300
ZYCOO: H81, H83