HP 4120 IP Phone Series

Product overview

The HP 4120 IP Phone Series is optimized for use with Microsoft® Lync unified communications and can support the familiar Microsoft Office 365 desktop suite combined with the latest, cloud-based versions of Microsoft's next-generation communications and collaboration services.

The HP 4120 IP Phone Series supports all Lync-optimized IP phone features, including Microsoft "Better Together" mode, which leverages Lync's powerful collaboration capabilities.

The HP 4120 IP Phone Series is ideal for small enterprises and small- to medium-sized businesses that wish to reduce infrastructure spending and achieve the benefits of unified communications delivered through cloud services.
  • Optimized for seamless operation with Microsoft® Lync unified communications
  • Support for Microsoft Office 365 integration
  • Support for Microsoft "Better Together" mode
  • Easy phone installation with PoE connectivity

What's new

The HP 4120 IP Phone Series, optimized for Microsoft Lync UC, can support Office 365, Microsoft's familiar Office suite with the latest, cloud-based versions of next-generation communications and collaboration services.

  • Simplifies branch office complexity with converged branch in a box router
  • Consolidates networking, storage, server, and virtualization infrastructure
  • Best of breed Microsoft Lync© Branch Survivability
  • Microsoft Unified Communication Open Interoperability Program certified gateways
  • AllianceOne modules are available on MSR30 Series and MSR50 Series routers

HP AllianceOne integration

  • Optimized for seamless operation with Microsoft Lync unified communications — provides a rich set of unified communications features; supports Microsoft "Better Together" mode and Microsoft Office 365 integration; is 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; supports an optional external power supply unit adapter where PoE is not available
  • USB host and device support — allows USB connectivity for "Better Together" connectivity
  • Headset port — provides wideband frequency response for use with optional external headset


  • LLDP-MED (Media Endpoint Discovery) — defines a standard extension of LLDP that 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 — is 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; full-duplex speakerphone (compliant with IEEE 1329 Type 1) supports acoustic echo cancellation and provides wideband speaker and microphone
  • User interface — includes 3.5-inch TFT display (320 x 240 pixels), Unicode character capability, and LCD backlight with automatic display dimming on idle; supports multiple languages
  • Software features — basic mode supports contacts, photos, and standard enterprise IP-PBX features such as CAC, survivability, E911 (U.S. only), and call park; enhanced mode provides individual voicemail listings, calendar, and conference features; provides teleworker support
  • LED display — provides easy visual indicator of important phone features and status

Warranty and support

  • 1-year warranty — with advance replacement and 30-calendar-day delivery (available in most countries)

HP 4120 IP Phone Series

General specifications

HP 4120 IP Phone (J9766B)
2 RJ-45 auto-negotiating 10/100/1000 PoE ports (IEEE 802.3 Type 10BASE-T, IEEE 802.3u Type 100BASE-TX, IEEE 802.3ab Type 1000BASE-T, IEEE 802.3af PoE)
Physical characteristics
8.86(w) x 1.65(d) x 9.37(h) in (22.5 x 4.19 x 23.8 cm) (0U height)
Weight 3.31 lb (1.5 kg), Fully loaded 1.5 kg
Full configuration weight 3.31 lb (1.5 kg)
Operating temperature 32°F to 104°F (0°C to 40°C)
Operating relative humidity 10% to 90%, noncondensing
Nonoperating/Storage temperature -40°F to 185°F (-40°C to 85°C)
Nonoperating/Storage relative humidity 20% to 90%, noncondensing
UL 60950-1CAN/CSA 22.2 No. 60950-1EN 60950-1ICES-003FCC Part 15, Subpart BGOSTEN 55022 Class AEN 55024: 1998C-TickVCCI Class A
Phone characteristics
Fixed feature buttons Alphanumeric keys (0–9), *, and #; Speakerphone, Mute, Volume Up/Down/Select, Home and Back navigation, and Headset (21 total)
Soft keys Menu plus 2 soft keys
Display type TFT display
Display size 3.5 in.
Display pixel resolution 320 x 240 pixels
Desk stand Included
Microsoft Lync unified communications support:
  • Seamless operation with all Lync-optimized IP phone features
  • Microsoft Office 365 integration
  • Microsoft "Better Together" mode
  • Standalone operation in a Lync environment
  • Latest WinCE rollup
  • Client-side Music on Hold

Acoustic performance highlights:

  • Voice activity detection (VAD)
  • Comfort noise generation (CNG)
  • Acoustic echo cancellation (AEC)
  • DTMF tone generation/DTMF event RTP payload
  • Packet loss concealment
  • Low-latency audio packet transmission
  • Adaptive jitter buffers
  • Background noise suppression
  • Automatic gain control (AGC)
  • Dynamic noise reduction
  • Volume control for each audio output

Available user languages:

  • English, French, Brazilian Portuguese, Spanish, German, Italian, Dutch
  • Russian, Turkish, Polish, Czech, Slovak, Hungarian, Romanian, Ukrainian, Croatian
  • Japanese, Korean, Simplified Chinese, Traditional Chinese
  • Finnish, Swedish, Norwegian, Danish

LED status indicators:

  • Presence indicator
  • Other LEDs for Mute, Speaker, Ringing/In Call/Hold, Headset, and Voicemail


CISPR 22 Class B; EN 55022 Class B; EN 55024; ICES-003 (Canada); ICES-003 Class B; VCCI (Japan); FCC Part 15, Class B; GOST; KCC Class A

HP IP Phone 5V Power Supply (J9767A)

HP IP Phone 5V Power Supply is used with HP 41xx series of IP phones.

Physical characteristics

Dimensions: 3.7(d) x 1.51(w) x 1.17(h) in. (9.4 x 3.84 x 2.96 cm)
Weight: 0.38 lb. (0.17 kg) power adpater and US power cord


Operating temperature: 32°F to 104°F (0°C to 40°C)
Operating relative humidity: 10% to 90%, noncondensing

Electrical characteristics

DC voltage: 5V DC
Current: 3 A
Power output: 15 W
Notes: continuous power


CE Labeled
UL 60950-1
EN 60950


EN 55022 Class B
FCC Part 15, Class B


ESD: IEC 61000-4-2
Radiated: IEC 61000-4-3
EFT/Burst: IEC 61000-4-4
Surge: IEC 61000-4-5
Conducted: IEC 61000-4-6
Harmonics: IEC 61000-3-2
Flicker: IEC 61000-3-3


Weight will vary due to power cords in various countries and due to packaging.

Compatible products

HP 4120 IP Phone Series

HP Care Packs for HP Networking

There are currently no care packs

HP Networking Services

Services that add value to your business

The warranties on HP Networking products provide a robust foundation for ongoing network support, but many customers have advanced support needs. Today's enterprise businesses, regardless of their size, are under increasing pressure to reduce the cost and complexity of supporting their network infrastructures. Demand for new services from businesses and their end users is constantly increasing. HP offers an affordable, comprehensive portfolio of networking services for organizations of all sizes. HP has a unique services advantage you can benefit from, and HP is the only vendor in the IT industry that can provide integrated and consistent support for your entire technology infrastructure worldwide, including networking, servers and storage, and imaging and printing, as well as desktop and mobile computing, to help you grow your business with expert support that is affordable, personal, and scaled to your needs. HP Networking's implementation and design centers simplify your network planning, while HP Technology and Enterprise Services deliver choice and flexibility.

HP provides a full range of custom services to meet the end-to-end networking needs of our customers. HP Network Lifecycle Services form the core foundation of network consulting, assessments, planning, design, integration, deployment, and management. They are available as standalone services or can be crafted to deliver solutions across the services portfolio, spanning network performance, network security and risk management, global deployment, data center networking, wireless LAN/mobility, and Unified Communications and Collaboration.

Additional Support and Services

To get more details about the HP Services available in your country, please visit Networking Services


1 results
No content available for the current selections and/or search text.

Search Hints

  • Text entered will search within the current high-level category (Switches or Wireless for example)
  • Results are based on matches within the title and any product associations
  • The search is not case sensitive
  • Separate terms or phrases with a space, no commas
  • Use quotes to search for an exact phrase. Ex: "converged infrastructure"
  • You may mix and match single terms and phrases. Ex: "converged infrastructure" 5400
Analyst Reports  (0)
Size Date
Brochures  (0)
Size Date
Case Studies  (0)
Size Date
Configuration  (0)
Size Date
Diagram Tools  (0)
Size Date
Firmware & Release Notes  (0)
Size Date
Installation  (0)
Size Date
Planning & Design  (0)
Size Date
Product Specifications / FAQs  (0)
Size Date
Programming & Development  (0)
Size Date
Related Links  (0)
Size Date
Safety & Regulatory  (0)
Size Date
Service & Maintenance  (0)
Size Date
User Guides  (0)
Size Date
White Papers  (0)
Size Date
Search results (0) Type Size Date