VoIP - Yealink IP Phones

Yealink SIP-T21P E2
Yealink SIP-T27P
Yealink SIP-W52H
Yealink SIP-W52P
Yealink PS-T2
Yealink EXP40
Yealink EHS36
Yealink RT10
Yealink RT20
Yealink RT20
Yealink SIP-T42S
Yealink SIP-W56H
Yealink SIP-W56P