Product Overview1Product OverviewThis chapter contains the following information about IP phones: SIP IP Phone Models Expansion ModulesSIP IP Phone ModelsThis section introduces SIP-T54S, SIP-T52S, SIP-T48G/S, SIP-T46G/S, SIP-T42G/S, SIP-T41P/S,SIP-T40P/G, SIP-T29G, SIP-T27P/G, SIP-T23P/G, SIP-T21(P) E2, SIP-T19(P) E2 and CP860 IP phonemodels. These IP phones are endpoints in the overall network topology, which are designed tointeroperate with other compatible equipments including application servers, media servers,internet-working gateways, voice bridges, and other endpoints. These IP phones arecharacterized by a large number of functions, which simplify business communication with ahigh standard of security and can work seamlessly with a large number of SIP PBXs.These IP phones provide a powerful and flexible IP communication solution for Ethernet TCP/IPnetworks, delivering excellent voice quality. The high-resolution graphic display suppliescontent in multiple languages for system status, call log and directory access. IP phones alsosupport advanced functionalities, including LDAP, Busy Lamp Field, Sever Redundancy andNetwork Conference.IP phones comply with the SIP standard (RFC 3261), and they can only be used within a networkthat supports this model of phone.For a list of key features available on Yealink IP phones running the latest firmware, refer to KeyFeatures of IP Phones on page 14.Physical Features of IP PhonesThis section lists the available physical features of SIP-T54S, SIP-T52S, SIP-T48G/S, SIP-T46G/S,SIP-T42G/S, SIP-T41P/S, SIP-T40P/G, SIP-T29G, SIP-T27P/G, SIP-T23P/G, SIP-T21(P) E2 andSIP-T19(P) E2 desktop IP phones and CP860 IP conference phones.
