The Polycom® VVX® 400 business IP desk phone is a color 12-lined mid-range phone for today's office worker and call attendants who depend on crystal clear communications. 

Industry’s best audio 

Poly HD voice technology and Poly Acoustic fence technology provide voice clarity and eliminate noise and distractions. The full duplex speakerphone with Acoustic Clarity Technology brings the audio experience as close as possible to being in the same room.

Further Reading

VVX 400 Hardware Feature Descriptions

Reference Number


Feature Description


TimeProvides current Time
2Message Waiting IndicatorFlashes red to indicate when you have new messages.
3Missed CallsIndicates total amount of missed incoming calls
4Line KeysEnable you to select a phone line, view calls on a line, or quickly call a favorite contact.
5Home KeyDisplays the Home screen from other screens and displays the Lines and Calls screen from the Home
6Soft KeysEnable you to select context sensitive keys that display along the bottom of the screen.
7Navigation/SelectScrolls through information or options displayed on the phone's screen. Selects a field of displayed data.
8DialpadEnables you to enter numbers, letters, and special characters. You can also use the dial pad keys to select menu items that have index numbers.
9HeadsetEnables you to place and receive calls through a headset.
10Speakerphone KeyEnables you to place and receive calls using the speakerphone.
11Mute keyMutes local audio during calls and conferences.
12Volume KeysAdjust the volume of the handset, headset, speaker, and ringer.
13TransferTransfers an active call to a contact.
14HoldHolds an active call or resumes a held call.
15MessagesEnables you to access and manage instant and voice messages.

Product specifications

User interface features

  • Backlit 3.5 in color LCD (320 x 240) resolution
  • Voicemail support 
  • WebKit-based browser
  • Adjustable base height
  • Single USB port (2.0 compliant) for media and storage applications
  • Unicode UTF-8 character support. Multilingual user interface including Chinese, Danish, Dutch, English (Canada/ US/UK), French, German, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Slovenian, Spanish and Swedish

Call handling features

  • 12 lines (programmable line keys)
  • Shared call/bridged line appearance
  • Busy lamp field
  • Flexible line appearance (1 or more line keys can be assigned for each line extension)
  • Supports compatible USB headsets
  • Distinctive incoming call treatment/ call waiting
  • Call timer and call waiting
  • Call transfer, hold, divert (forward), pickup
  • Called, calling, connected party information
  • Local 3-way audio conferencing
  • 1-touch speed dial, redial
  • Remote missed call notification
  • Do not disturb function
  • Electronic hook switch capable
  • Local configurable digit map/dial plan

Network and provisioning

  • SIP protocol support
  • SDP
  • IETF SIP (RFC 3261 and companion RFCs)
  • Two-port gigabit Ethernet switch

    • 10/100Base-TX across LAN and PC Ports
    • Conforms to IEEE802.3-2005 (Clause 40) for physical media attachment
    • Conforms to IEEE802.3-2002 (Clause 28) for link partner auto-negotiation
  • Manual or dynamic host configuration protocol (DHCP) network setup
  • Time and date synchronization using SNTP
  • FTP/TFTP/HTTP/HTTPS serverbased central provisioning for mass deployments
  • Provisioning and call server redundancy supported *
  • QoS Support—IEEE 802.1p/Q tagging (VLAN), Layer 3 TOS and Diffserv/DSCP
  • VLAN-CDP, DHCP VLAN discovery, LLDP-MED for VLAN discovery
  • Network address translation support for static configuration and “keep-alive” SIP signaling
  • RTCP and RTP support
  • Event logging
  • Syslog
  • Hardware diagnostics
  • Status and statistics reporting
  • IPv4 and IPv6
  • TCP
  • UDP


  • 802.1X authentication and EAPOL
  • Media encryption via SRTP
  • Transport layer security
  • Encrypted configuration files
  • Digest authentication
  • Password login
  • Support for URL syntax with password for boot server address
  • HTTPS secure provisioning
  • Support for signed software executables


  • Built-in auto-sensing IEEE 802.3af Power over Ethernet
  • Energy-saving after-hours mode
  • External universal AC adapter (optional), 48VDC 0.3A


  • FCC Part 15 (CFR 47) Class B
  • ICES-003 Class B
  • EN55022 Class B
  • CISPR22 Class B
  • VCCI Class B
  • EN55024
  • EN61000-3-2; EN61000-3-3
  • NZ Telepermit
  • Korea KC ***
  • Russia CU
  • Brazil ANATEL ***
  • Australia RCM
  • ROHS compliant