Блок питания к SIP-телефонам : Yealink SIP-T20  Yealink SIP-T20P Yealink SIP-T22 Yealink SIP-T22P Yealink SIP-T26P Yealink SIP-T27P Yealink SIP-T28P Yealink SIP-T41P Yealink SIP-T42G