Generic
* 2 SIP Lines
* HD Voice
* POE Enabled(X3SP/X3G)
* Handset(HS) / Hands-free(HF) / Headphone(HP) mode (EHS support for Plantronics headsets)
* Desktop / Wall-mount installation
* Economical and Environmental friendly package
* Industrial Standard Certifications: CE/FCC

Call Features
* Call out / answer / reject
* Mute / unmute (microphone)
* Call Hold / Resume
* Call Waiting
* Intercom
* Caller ID Display
* Call Forwarding (Always/Busy/No Answer)
* Call Transfer (Attended/Unattended)
* Call Parking/Pick-up (depending on server)
* Redial
* Do-Not-Disturb (per line / per phone)
* Auto-Answering (per line)
* Voice Message (on server)
* Local 3-way Conference
* Hot Line

Phone Features
* Phone Accessibility Control by User PIN
* Intelligent Phonebook (up to 500 entries total)
* Remote Phonebook (XML/LDAP)
* Intelligent Contact Number Matching / Filtering
* Call log (300 entries total, in/out/missed)
* Voice Message Waiting Indication (VMWI)
* Network Time Synchronization
* Multi-language support in screen and web UI: English, Chinese(Traditional/Simplified), Japanese, Russian, Italian, Turkish, Germany, Dutch, Spanish, Hebrew, Polish, French etc.

Audio
* HD Voice Microphone/Speaker (Handset/Hands-free, 0~7KHz Frequency Response)
* Wideband ADC/DAC 16KHz Sampling
* Narrowband CODEC: G.711a/u, G.723.1, G.726-32K, G.729AB
* Wideband CODEC: G.722
* Full-duplex Acoustic Echo Canceller (AEC) – Hands-free Mode, 96ms tail-length
* Voice Activity Detection (VAD) / Comfort Noise Generation (CNG) / Background Noise Estimation (BNE) / Noise Reduction (NR)
* Packet Loss Concealment (PLC)
* Dynamic Adaptive Jitter Buffer up to 300ms
* DTMF: In-band, Out-of-Band – DTMF-Relay (RFC2833) / SIP INFO

Networking
* Physical: 10/100Mbps(X3S/X3SP), 10/100/1000Mbps(X3G) Ethernet, dual bridged port for PC bypass
* IP Configuration: Static / DHCP / PPPoE
* Network Access Control: 802.1x
* VPN: L2TP (Basic Unencrypted) / OpenVPN
* VLAN
* QoS

Protocols
* SIP2.0 over UDP/TCP/TLS
* RTP/RTCP/SRTP
* STUN
* DHCP
* PPPoE
* 802.1x
* L2TP (Basic Unencrypted)
* OpenVPN
* SNTP
* FTP/TFTP
* HTTP/HTTPS
* TR069

RFCs:
354/1321/1350/1769/1889/1890/2131/2132/
2616/2617/2661/2833/2976/3261/3262/3263/
3264/3265/3268/3311/ 3489/3711/4346/4566/
5630/5865

Deployment & Maintenance
* Auto-Provisioning via FTP/TFTP/HTTP/HTTPS/DHCP/OPT66/SIP PNP/TR069
* Web Management Portal
* Web-based Packet Dump
* Configuration Backup/Restore
* Auto/Manual Online Software Upgrade
* Syslog

Physical Specifications
* LCD x1: 2.4/2.8 inch (320x240) color-screen LCD
* Keypad: 32 keys, including
4 Soft-keys
12 Standard Phone Digits keys
5 Navigation keys
2 Line keys with tri-color LED
5 Function key
3 Volume Control keys, Up/Down/Mute(Microphone)
1 Hands-free
* HD Hands-free Speaker (0 ~ 7KHz) x1
* HD Hands-free Microphone (0 ~ 7KHz) x1
* HD Handset (RJ9) x1
* Standard RJ9 Handset Wire x1
* 1.5M CAT5 Ethernet Cable x1
* RJ9 Phone Jacket x2: Handset x1, Headphone x1
* RJ45 Ethernet Jacket x2: Network x1 (802.3AF POE Class 1 Enabled), PC x1 (Bridged to Network)
* Main Chipset: Broadcom
* DC Power Input: 5V/600mA
* Working Temperature: 0 ~ 40℃
* Working Humidity: 10 ~ 65%
* Dual-Functional Back Rack x1: Desktop Stand / Wall-mount
* Color: Black
* Package Dimensions: 275x215x62mm (W x H x L)