Fanvil X4U Gigabit SIP Enterprise Desktop Phone with Dual-Color LCD Display

Fanvil X4U Gigabit SIP Enterprise Desktop Phone with Dual-Color LCD Display

A dual-screen layout is only as useful as the line capacity behind it, and a phone offering 30 DSS keys but limited to a handful of SIP lines leaves real capability on the table. The Fanvil X4U closes that gap directly, pairing the same 2.8-inch main and 2.4-inch side color displays found on Fanvil’s X4 series with a full 12 SIP lines as standard — genuine enterprise-scale calling capacity to match its expanded key layout.

This is Fanvil’s X4U from the U-series enterprise lineup, built for desks that need both substantial line capacity and the dual-screen visibility to manage it effectively.

12 SIP Lines: Triple the Capacity of Fanvil’s Standard X4

Where Fanvil’s standard X4 series tops out at 4 SIP lines, the X4U supports a full 12 — genuinely enterprise-scale capacity for desks handling substantial call volumes, multiple monitored extensions, or department-level line management that a lower-capacity phone simply can’t accommodate.

Dual Color Screens Delivering Up to 30 DSS Keys

The X4U’s 2.8-inch main color display paired with a dedicated 2.4-inch side color display together support up to 30 programmable DSS keys, giving genuine one-glance visibility and one-touch access across speed dial, BLF line monitoring, and quick-access functions — key capacity that’s actually proportionate to the phone’s substantial 12-line calling capability.

A Genuinely Expanded 1000-Entry Phonebook and Call Log

The X4U doubles the local phonebook and call log capacity found on Fanvil’s standard X4 series, providing 1000 entries for both local contacts and call history — meaningfully more storage for desks managing a larger, more active contact base.

HD Audio With Comprehensive Wideband Codec Support

Supporting both G.722 and Opus wideband codecs, the X4U delivers genuinely rich HD voice quality, a step up from the X4 series’ G.722-only wideband support, ensuring clearer audio across a broader range of network and platform conditions.

Six-Way Conferencing Built Directly Into the Phone

The X4U supports 6-way audio conferencing natively, letting teams collaborate on calls directly from the phone without separate conferencing hardware or software.

Optional Bluetooth and Wi-Fi via USB Dongles

The X4U supports wireless headset connectivity through an optional USB Bluetooth dongle, alongside optional Wi-Fi connectivity via a USB Wi-Fi dongle — giving businesses the flexibility to add wireless capability selectively where a specific desk actually needs it, rather than paying for built-in radios across every deployed unit.

Gigabit Ethernet as Standard

With 10/100/1000Mbps Gigabit Ethernet built in as standard — not an optional variant as with the base X4 series — the X4U is matched to modern office network infrastructure from the outset, ensuring the phone never becomes a bottleneck for either its own traffic or a connected PC’s pass-through connection.

PoE Support for Simplified Installation

Power over Ethernet lets the X4U draw power directly through its network cable, simplifying installation and reducing cabling complexity across a deployment involving multiple high-capacity desks.

EHS Headset Support for Flexible Hands-Free Operation

The X4U supports EHS (Electronic Hook Switch) wired headset integration, giving users a wired alternative to Bluetooth for hands-free calling depending on preference or existing headset investment.

Adjustable Desktop Positioning

A foot stand adjustable to 45 and 50 degrees lets each desk set the phone at whichever angle actually suits that workspace.

The Practical Case for Choosing the X4U

For enterprise desks that genuinely need both the visibility of dual color screens and the calling capacity to make that visibility worthwhile, the X4U delivers exactly that combination. Where the standard X4 series offers dual screens with modest 4-line capacity, the X4U scales both display and line count together, avoiding the mismatch of extensive key programmability paired with limited underlying capacity.

Perfect For

• Enterprise desks needing substantial 12-line calling capacity with dual-screen visibility
• Department leads and receptionists managing large numbers of monitored extensions
• Businesses wanting a larger local phonebook and call log than Fanvil’s standard X4 series
• Offices running Gigabit network infrastructure as their baseline standard
• IT teams wanting the option to add Bluetooth or Wi-Fi selectively via USB dongles
• Organizations wanting genuinely enterprise-scale capacity from Fanvil’s U-series lineup
• Teams needing 6-way conferencing matched to substantial line capacity