Grandstream GAC2500, IP Multimedia Conference Phone, Android OS, 6 SIP Accounts and 7-way voice conferencing,

Protocols/Standards SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS (A record, SRV, NAPTR), DHCP, PPPoE, SSH, TFTP, NTP, STUN, SIMPLE, LLDP, LDAP, TR-069, 802.1x, TLS, SRTP*, IPV6 (expected), OpenVPN (expected) Network interface Gigabit Ethernet port with auto-detection and built-in PoE+ (IEEE 802.3at Class 4) Graphic display 4.3” IPS LCD display with 800x480 resolution Microphone 3 cardioid microphones; capture distance 12 ft., 360° coverage Speaker Frequency: 220-14,000 Hz Volume Up to 86 dB at 0.5 meters Bluetooth Yes, built-in. Bluetooth 4.0 Wi-Fi Yes, built-in. 802.11 b/g/n Additional ports 3.5mm audio port, USB Micro-B, RJ48 flex port Speech codecs Support G.711µ/a, G.722, G.726, iLBC, Opus, G.722.1 and G.722.1c (expected), In-band and out-of-band DTMF (In audio, RFC2833, SIP INFO), G.729A/B, VAD, CNG, AEC, PLC, AJB, AGC Telephony functions 6 SIP accounts, retention, forwarding, translation, 7-way conference, call parking, call interception, downloadable phonebook (XML, LDAP, up to 2000 entries), call waiting, call history (up to 2000 entries), XML screen setup, automatic call reception, mouse-click dialing, flexible number plan, "hot" workplace, personalized ringtones and music on hold, server reservation and switching in case of failure Application Examples Web browser, Adobe Flash, Facebook, Twitter, YouTube, Google Calendar, import/export data from a mobile phone via Bluetooth, etc. API/SDK is available for advanced development of user applications HD Audio Yes, a speaker with broadband audio support QoS Layer 2 QoS (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoS. Safety User and administrator level access control , MD5 and MD5-sess authentication, 256-bit configuration file protected by AES, TLS, SRTP*, HTTPS, 802.1x media access control Multi-language support English, German, Italian, French, Spanish, Portuguese, Russian, Croatian, Chinese, Korean, Japanese, etc. Update/Provision of services Firmware update via TFTP/HTTP/HTTPS or local HTTP download, mass connection using TR-069 or AES encrypted XML configuration file Energy consumption and environmental efficiency Universal power supply: Input: 100-240VAC 50-60Hz; Output: 12VDC,2A (24W) Physical properties Dimensions: 280mm(W) x 285mm(L) x 60mm(H) Weight:1.34kg; Package weight: 2.35kg Temperature and Humidity Operation: from 0°C to 40°C Storage: -10°C to 60°C Humidity: from 10% to 90% without condensation Contents of the delivery set Phone GAC2500, Universal power supply, Network cable, USB cable, RJ48 cascade cable, Quick Installation Guide Accordance FCC: Part 15(CFR 47) Class B, FCC Part 15C 15.247; UL 60950 (power adapter). CE: EN 55032,EN 55035,EN 61000-3-2,EN 61000-3-3,ETSI EN 301 489-1,ETSI EN 301 489-17, ETSI EN 300 328, EN 60950-1,EN 62311, RoHS. RCM: AS/NZS CISPR 32, AS/NZS 60950.1, AS/NZS 4268.