GrandStream Executive IP Phone - GXP2120 GS-GXP2120

• Grandstream Executive HD telephone
• 6 dual-color line keys (with 6 SIP accounts), 4 XML programmable context-sensitive soft keys, up to 5-way conferencing, and up to 13 call appearances with 7 dual-color BLF extension keys
• HD wideband audio, superb full-duplex hands-free speakerphone with advanced acoustic echo cancellation, and excellent double-talk performance
• Optional add-on line expansion modules with an extra 112 extension keys for receptionist and heavy call center requirements
• Support SIP (RFC3261), TCP/IP/UDP, RTP/RTCP, HTTP, ARP, ICMP, DNS (A record and SRV), DHCP(both client and server), PPPoE, TFTP, NTP
• Dual switched 10/100Mbps Ethernet ports w/integrated Power-over-Ethernet (802.3af)
• Support NAT traversal (STUN, etc), server fail-over, SIP presence (SIMPLE), and more
• Generous 320x160 pixel backlit graphical LCD display with up to 8 level grayscale
• 6 lines indicators with individual SIP account profiles
• 7 programmable hard keys and 4 XML programmable context-sensitive soft keys
• Multi-line support of up to 13 call appearance lines with dual-color LED indicators
• Expandable to additional 112 lines through expansion key-modules
• Support Caller ID display or block, per call or permanent
• Call waiting, hold, mute, transfer (blind or attended), forward, and more
• Multi-party conferencing (up to 5-way)
• Full duplex speakerphone w/advanced audio echo cancellation
• Headset jack (2.5 mm and RJ9) for broad headset compatibility
• Large phonebook (up to 2,000 contacts) and call history (up to 2,000 records)
• Automated provisioning using TR-069 or encrypted XML configuration file, SRTP and TLS for advanced security protection, 802.1x for media access control
• Automated personal information service (e.g., local weather, stock, currencies, RSS news, etc), personalized music ring tone/ring back tone/music-on-hold, flexible customizable screen content & format using XML, and advanced Web and enterprise applications integration (pending)
• And many more enterprise-grade features
• SIP Compliance and protocols - SIP, TCP/IP/UDP, RTP/RTCP, HTTP, ARP, ICMP, DNS (A record and SRV), DHCP, PPPoE, TFTP, NTP, etc.
• Dual 10/100mbps Ethernet ports
• Voice codecs - G.711 (a/u-law), G.723.1, G.729A/B, G.726, iLBC, and G.722 (wideband)
• Superb Audio Quality - Advanced Digital Signal Processing (DSP), Silence suppression, VAD, CNG, AGC high fidelity wideband audio (G.722). HD handset
• Custom ringtone software - Convert most music files to a Grandstream ringtone
• Advanced functionality - Multi-line support, multi-party conferencing (5-way), multi-language support (MLS), headset enabled, expandable, intercom, AES encryption, etc.
• Cost-effective IP solution - small to medium enterprise office IP phone