| Model | GXP1625 |
| Network Interface | Dual switched 10/100 Mbps ports |
| Protocol Support | SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS (A record, SRV, NAPTR), DHCP (client and server), PPPoE, TELNET, TFTP, NTP, STUN, SIMPLE, LDAP |
| Voice Codecs | Support for G.711µ/a, G.722 (wideband), G.723.1, G.726-32, G.729 A/B, iLBC, and Opus voice codecs |
| Display | 132×48 pixel LCD display |
| Line Keys | 2 line keys with dual-color LED and 3 SIP accounts |
| Speakerphone | Full-duplex hands-free speakerphone with advanced acoustic echo cancellation |
| Headset Support | RJ9 headset jack (allowing EHS with Plantronics headsets) |
| Audio Features | HD audio on speakerphone and handset, support for headset with microphone and Electronic Hook Switch (EHS) with Plantronics headsets |
| Call Handling | Hold, transfer, forward, 3-way conference, call park, call pickup, shared-call-appearance (SCA) / bridged-line-appearance (BLA), downloadable phone book (XML, LDAP, up to 500 items) |
| Call Features | Caller ID, call waiting, call transfer, call park, call history, do not disturb (DND), busy lamp field (BLF), flexible dial plan, auto-answer, click-to-dial, hot-desking, personalized music ringtones, server redundancy and fail-over |
| Security | SRTP and TLS for advanced security protection, 802.1x authentication, HTTPS (server/client), SIP over TLS, VLAN QoS (802.1pq), password-protected web interface, AES encryption for configuration file, and support for TR-069 |
| Provisioning | Support for auto-provisioning with TFTP/HTTP/HTTPS/PnP, TR-069, and manual configuration through web interface |
| Power Supply | Universal power adapter included: Input 100-240V; Output +5V, 1A |
| Dimensions | 209mm x 184mm x 76mm |
| Weight | 0.88 kg |
| Operating Temperature | 0°C to 40°C |
| Storage Temperature | -10°C to 60°C |
| Humidity | 10% to 90% non-condensing |
| Package Contents | GXP1625 phone, handset with cord, base stand, universal power supply, network cable, quick installation guide, brochure |
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