Fanvil X4U Enterprise IP Phone with 12 SIP Lines

Specifications

1. General & Highlight Features

• 12 SIP lines, 6‑way audio conferencing, SIP hotspot
• Dual 320×240 color LCDs: 2.8″ main screen + 2.4″ DSS screen
• Supports up to 30 DSS keys via paging, plus 3 main line keys with LEDs

2. Audio & Codecs

• HD audio (0–7 kHz) via handset and speaker
• Narrowband: G.711a/u, G.723.1, G.726-32K, G.729AB, AMR, iLBC
• Wideband: G.722, AMR-WB, Opus
• Full-duplex Acoustic Echo Cancellation, Voice Activity Detection, Comfort Noise Generation, Noise Reduction, Automatic Gain Control, Packet Loss Concealment, adaptive jitter buffer, DTMF RFC2833/SIP INFO

3. Networking & Security

• Dual Gigabit Ethernet ports (PC bypass), supports 802.3af/at PoE
• IPv4/IPv6, VLAN, QoS, LLDP, CDP, DHCP/PPPoE, SNTP
• VPN: L2TP, OpenVPN; Network access control via 802.1x
• Supports STUN, RTP/RTCP/SRTP, RTCP-XR, VQ-RTCPXR

4. Ports & Expandability

• RJ9 ports: handset and headset (supports EHS for Plantronics/Jabra)
• USB‑A port: for BT20 Bluetooth dongle, WF20 Wi‑Fi dongle, or USB flash storage
• Dual RJ45 LAN/PC ports and DC input 5 V / 2 A

5. Call Features & Directory

• Local and LDAP/XML remote phonebooks (up to 1,000 entries each), call logs (1,000 entries)
• Call handling: hold/resume, waiting, forward (always/busy/no‑answer), transfer (attended/unattended), park/pick‑up, intercom, auto‑answer, hot‑line, hot‑desking, DND, speed‑dial, anonymous call
• Programmable DSS/soft keys, blacklist/whitelist, VMWI, screen saver, action URL, uaCSTA

6. Provisioning & Management

• Auto‑provisioning via FTP/TFTP/HTTP/HTTPS/DHCP‑OPT66/SIP PNP/TR‑069
• Web GUI, packet dump, syslog, config import/export, phonebook export/import, firmware upgrade

7. Physical & Power Specs

• Dimensions (desk, angle 45°): 214×188.6×181.1 mm; (desk, 50°): 214×180.5×190.1 mm; wall mount: 214×119.4×219.1 mm
• Weight/finish: black housing, wall-mountable with bracket
• Power consumption: idle ~0.87–1.27 W, peak ~4.72–6.8 W (adapter); PoE draws up to ~10.46 W
• Angle-adjustable desktop stand (45°/50°), wall-mounting option
• Temperature: 0–45 °C; humidity: 10–95% RH

Summary Table

Category	Specification
SIP Lines	12
Displays	2.8″ main screen + 2.4″ DSS screen (320×240 each)
DSS Keys	Up to 30 programmable
Audio	HD handset/speaker, wideband codecs (G.722, AMR-WB, Opus)
Networking	Dual Gigabit + PoE, IPv6, VPN, VLAN, QoS, dual-port
Expandability	USB dongles: Bluetooth/Wi-Fi; EHS headset support
Call Management	Standard features: forward, transfer, park, pickup, conferencing, etc.
Provisioning	Multiple provisioning methods incl. TR-069, SIP PNP
Power	5 V DC or PoE, desktop or wall mounting
Physical	Angle-adjustable stand, compact desk and wall dimensions