Model: Grandstream GRP2602P 2-Line Essential IP PhoneSIP Accounts: 4 SIP accounts supportedLines: 2 linesDisplay: 2.4-inch (132 48) backlit LCD screenAudio: HD audio with noise shield technologyConferencing: 5-way audio conferencingNetwork Ports: Dual 10/100 Mbps Ethernet portsPower: PoE (IEEE 802.3af) supportedPower Adapter: Included (depending on package variant)Headset Support: RJ9 headset port with EHS supportCodecs: G.711, G.722, G.723, G.726, G.729, iLBC, OPUSProtocols: SIP, TCP/IP, UDP, RTP, HTTP/HTTPS, DHCP, DNS, TLS, SRTPManagement: GDMS cloud provisioning supportSecurity: Secure boot, encrypted storage, TLS/SRTP encryptionFeatures: Call hold, transfer, forward, 5-way conference, call logs, phonebook supportDisplay Interface: 4 programmable soft keys and navigation keysInstallation: Desktop or wall-mount optionOperating Temperature: 0C to 40CBuild: Compact enterprise-grade IP phone designApplication: Office communication, VoIP systems, call centers