Yealink SIP-T28P IP Phone 6 Line SIPThe Yealink T28P is a top of the range business VoIP phone, featuring high quality telephony features including a 320 x 160 graphic LCD screen with 4-level grayscales, 6 VoIP accounts which are Broadsoft / Avaya/ Asterisk validated, and the TI TITAN chipset.Yealink T28P Technical SpecificationsPhone Features6 VoIP accounts, Hotline, Emergency callCall hold, Call waiting, Call forward, Call returnCall transfer (blind/semi-attended/attended)Caller ID display, Redial, Mute, DNDAuto-answer, 3-way conferencingSpeed dial, SMS, VoicemailMessage Waiting Indication (MWI) LEDTone scheme, Volume controlDirect IP call without SIP proxyRing tone selection/import/deletePhonebook (300 entries), Black listCall history: dialed/received/missed/forwardedMenu-driven user interfaceLocalized language and input methodSoft keys programmableSupports up to 6 expansion modules(EXP38 and EXP39)Supports Wireless Headset Adapter (EHS36)Advanced FeaturesXML phonebook search/importLDAP phonebookXML Browser, Hot-deskingPUSH XMLAction URL & Active URIIP PBX System IntegrationBusy lamp field (BLF), BLF listBridged line appearance (BLA)DND & Forward synchronizationIntercom, Paging, Music on holdCall park, Call pickupCall recording, Call completionGroup listening, Group pickupAnonymous call, Anonymous call rejectionNetwork conferenceDistinctive ringtoneDial Plan, Dial-nowCodecs and Voice FeaturesWideband codec: G.722Narrowband codec: G.711µ/A, G.723.1G.726, G.729ABVAD, CNG, AEC, PLC, AJB, AGCFull-duplex speakerphone with AECNetwork FeaturesSIP v1 (RFC2543), v2 (RFC3261)IPV6DNS SRV (RFC3263)Redundant server supportNAT Traversal: STUN modeDTMF: In-Band, RFC2833, SIP InfoProxy mode and peer-to-peer SIP link modeIP Assignment: Static/DHCP/PPPoEBridge/router mode for PC portTFTP/DHCP/PPPoE clientTelnet/HTTP/HTTPS serverDNS client, NAT/DHCP serverLogout
