Fanvil X4U IP Phone

The Fanvil X4U is a professional SIP IP phone designed for business users who require clear HD voice, efficient call management, and flexible network connectivity. It features dual color displays, support for up to 6 SIP lines, dual Gigabit Ethernet ports, integrated Power over Ethernet, programmable DSS keys, and a full-duplex hands-free speakerphone. The X4U also supports 5-way audio conferencing, Bluetooth connectivity, wireless headset integration, advanced SIP security, VLAN, QoS, IPv4 and IPv6 networking, and remote provisioning. Its combination of multiple programmable keys and dual-screen interface makes it well suited for reception desks, executive offices, customer service teams, call centers, and other professional VoIP environments.

Product Features

Dual Color Displays

The X4U uses a main color display together with a secondary display for programmable DSS keys, providing quick access to line status, extensions, busy lamp field monitoring, speed dial, and other frequently used functions.

6 SIP Lines

Support for up to 6 SIP lines allows users to manage multiple VoIP accounts, extensions, or business numbers from a single phone.

HD Voice Quality

The phone supports HD voice and wideband codecs such as Opus and G.722, providing clear and natural conversations through the handset and speakerphone.

5-Way Audio Conferencing

Built-in 5-way audio conferencing allows users to conduct multi-party business calls directly from the phone.

Dual Gigabit Ethernet Ports

Two 10/100/1000 Mbps Gigabit Ethernet ports provide high-speed network connectivity, with the secondary port supporting PC pass-through for convenient workstation networking.

Power over Ethernet

IEEE 802.3af PoE support allows the phone to receive power through the Ethernet cable, simplifying installation and reducing the need for additional power cabling.

Programmable DSS Keys

The X4U provides programmable DSS keys for quick access to SIP lines, extensions, busy lamp field monitoring, speed dial, and other business communication functions.

Bluetooth Connectivity

Integrated Bluetooth provides wireless connectivity for compatible accessories and peripherals, giving users additional flexibility in professional environments.

Wireless Headset Support

Electronic hook switch support enables compatibility with supported wireless headsets, allowing users to manage calls without being restricted to the handset.

Full-Duplex Speakerphone

The built-in full-duplex speakerphone enables hands-free communication with simultaneous two-way audio for business calls and conferences.

Advanced Call Management

The X4U supports call hold, transfer, forwarding, waiting, parking and pickup, redial, callback, speed dial, intercom, Do Not Disturb, auto-answer, and other professional telephony functions.

Secure SIP Communication

TLS and SRTP help protect signaling and voice traffic, while VLAN, QoS, 802.1X, and other network-management features support deployment on managed business networks.

Remote Provisioning

Support for multiple provisioning methods simplifies centralized configuration, firmware updates, and deployment across multiple phones.

Product Specifications

• Brand: Fanvil
• Product Series: X Series
• Model: X4U
• Product Type: Professional SIP IP phone
• Main Display: Color LCD
• Secondary Display: Color LCD for DSS keys
• SIP Lines: Up to 6
• Programmable DSS Keys: Supported
• Audio Conference: 5-way
• Ethernet Ports: 2 x 10/100/1000 Mbps RJ45 Gigabit Ethernet
• PC Pass-Through: Supported
• PoE: Supported
• PoE Standard: IEEE 802.3af
• Power Supply: External DC power adapter or PoE
• Wideband Codecs: G.722, Opus
• Narrowband Codecs: G.711A/U, G.723.1, G.726, G.729A/B, G.729AB, iLBC
• HD Audio: Supported
• Speakerphone: Full-duplex
• Acoustic Echo Cancellation: Supported
• Noise Reduction: Supported
• Automatic Gain Control: Supported
• Jitter Buffer: Adaptive
• DTMF: In-band, out-of-band, and SIP INFO
• Handset Port: RJ9
• Headset Port: RJ9
• Bluetooth: Supported
• SIP Protocol: SIP v1 and SIP v2
• SIP Transport: UDP, TCP, and TLS
• Encryption: AES-128 and AES-256
• Secure Voice: SRTP
• IP Support: IPv4 and IPv6
• Network Configuration: Static IP, DHCP, and PPPoE
• VLAN: Supported
• QoS: Supported
• LLDP: Supported
• CDP: Supported
• 1X: Supported
• VPN: L2TP and OpenVPN
• Phonebook: Supported
• Call History: Supported
• Remote Phonebook: XML and LDAP
• Auto-Provisioning: FTP, TFTP, HTTP, HTTPS, DHCP Option 66, SIP PnP, and TR-069
• Management: Web interface, configuration import and export, firmware upgrade, and Syslog
• Installation: Desktop or wall mounting
• Operating Temperature: 0 to 45°C
• Operating Humidity: 10% to 95%
• Application: Business VoIP, enterprise telephony, reception, call centers, customer service, and SIP-based IP-PBX systems
• Color: Black