The HP 4120 IP Phone Series is optimized for use with Microsoft® Lync™ Unified Communications, and can support Office 365, Microsoft's familiar Office desktop suite combined with the latest, cloud-based versions of Microsoft's next-generation communications and collaboration services. All Lync-optimized IP phone features are supported by the HP 4120 IP Phone Series, including Microsoft's "Better Together" mode, which leverages Lync's powerful collaboration capabilities.


HP AllianceOne Integration

Provides a rich set of unified communications features

Supports Microsoft "Better Together" mode

Office 365 integration supported

Designed for standalone operation in a Lync environment

Delivers ease of configuration and installation


Dual Gigabit Ethernet ports allows Gigabit Ethernet connectivity as well as pass-through capability

IEEE 802.3af Power-over-Ethernet (PoE) Class 2 support simplifies deployment and dramatically reduces installation costs by helping to eliminate the time and cost involved in supplying local power

USB connectivity for 'Better Together' connectivity

Headset port provides wideband frequency response for use with optional external headset

Supports an optional external power supply unit adapter where PoE not available


LLDP-MED (Media Endpoint Discovery) defines a standard extension of LLDP which stores values for parameters such as QoS and VLAN to automatically configure network devices such as IP phones

Phone Characteristics

Microsoft Real Time Audio (RTA) technology designed for both high-quality wideband and narrowband Voice over IP (VoIP) applications

G. 722 wideband audio codec support delivers voice calls with high-definition audio quality

G. 711 pulse-code modulation support provides support for legacy voice encoding (A-law, µ-law)

Support for wide variety of audio codec and acoustic performance requirements provides quality voice communications, improving collaboration, boosting productivity, and reducing operating costs

Handset and speakerphone audio outputs supports wideband and Hearing Aid Compatibility (HAC) outputs

United States (English)
Detailed specifications (PDF)

Additional Resources

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  • *Estimated U.S. retail price. Actual price may vary.

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