BYealink SIP-T22P Professional IP Phone with 3 Lines and HD Voice ReviewbP PP Yealink SIP-T22P Professional IP Phone with 3 Lines and HD Voice PTI Titan Chipset and TI voice EngineP3 VoIP accounts, 132x64 graphic LCDPHD Voice: HD Codec, HD Speaker, HD HandsetPHold, Mute, Flash, Auto-Answer, RedialPBLF, XML Browser, Hot-Desking | Power supply not included.