For: Yealink: SIP-T19P,SIP-T20P,SIP-T21P,SIP T22P,SIP T26P,SIP T28P, SIP T29G, SIP T32G, SIP-T38G, SIP-T41P, SIP-T42G, SIP-T46G, SIP-T48G and SNOM 320,SNOM 360,SNOM 370,SNOM 710,SNOM 720,SNOM 760,SNOM 820,SNOM 821,SNOM 87.
eBay