| Technical Specifications – Grandstream GAC2500 |
| Model | GAC2500 |
| Device Type | Android Enterprise Conference Phone |
| Operating System | Android 4.4 with Google Play Store access |
| SIP Accounts / Lines | 6 lines, 6 SIP accounts |
| Conference Bridge | Built-in 7-way voice conferencing |
| Display | 4.3″ (800×480) capacitive touch screen LCD |
| Network Interface | Auto-sensing Gigabit Ethernet with integrated PoE+ (IEEE 802.3at Class 4) |
| Wi-Fi | Built-in 802.11 b/g/n wireless |
| Bluetooth | Integrated Bluetooth 4.0 |
| Audio Features | HD audio with wideband codecs, full-duplex speakerphone, 3 cardioid microphones (12 ft pickup) |
| Voice Codecs | G.711μ/a, G.722, G.726, iLBC, Opus, G.722.1, G.722.1c (pending), G.729A/B, VAD, CNG, AEC, PLC, AJB, AGC |
| Auxiliary Ports | 3.5 mm audio port, USB Micro-B, RJ48 daisy chain port |
| Security | TLS, SRTP, HTTPS, 802.1x; MD5/MD5-sess authentication; 256-bit AES encrypted config |
| Protocols/Standards | SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, DNS, DHCP, PPPoE, SSH, TFTP, NTP, STUN, LLDP, LDAP, TR-069, IPv6 (pending), OpenVPN (pending) |
| Telephony / Call Features | Hold, transfer, forward, park, pickup, auto answer, click-to-dial, hot desking, phonebook (XML/LDAP, up to 2000 entries), call waiting, call log |
| QoS Support | 802.1Q, 802.1P, ToS, DiffServ, MPLS |
| Power | Universal power supply: 100-240 VAC → 12 VDC, 2 A (24 W); PoE+ powered |
| Dimensions (W×D×H) | 280 mm × 285 mm × 60 mm |
| Weight | ≈ 1.34 kg (unit); 2.35 kg (package) |
| Operating Temp. | 0 °C to 40 °C |
| Storage Temp. | -10 °C to 60 °C |
| Humidity | 10 % to 90 % non-condensing |
| Package Contents | GAC2500 phone, universal power supply, network cable, USB cable, RJ48 cascade cable, Quick Installation Guide |