Polycom VVX 250 Business IP Phone Manual

The Polycom VVX 250 is a business-grade IP phone featuring a 3.5-inch color LCD display, support for up to 4 SIP lines, HD Voice, PoE (Power over Ethernet), integrated Gigabit Ethernet switch, USB port for expansion, and advanced telephony features. It is designed for professional office environments requiring reliable VoIP communication. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Advanced Telephony Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Color LCD display, Handset, Keypad, Line keys, Navigation cluster, USB port, Ethernet ports.

FeatureDescription
Display3.5-inch color LCD (320 x 240 pixels) with backlight
AudioHD Voice (wideband audio), Acoustic Clarity Technology
NetworkDual Gigabit Ethernet ports (LAN and PC), PoE (802.3af)
LinesSupports up to 4 SIP lines with dedicated line keys
USB PortFor optional expansion modules (VVX EXP) or Bluetooth
Headset Port3.5mm jack for wired headset connectivity
ConferenceBuilt-in support for multi-party conferencing
PowerPoE or optional external power adapter (5V DC)
FirmwareUpgradable via web interface or provisioning server
ProtocolsSIP, TLS, SRTP, LLDP-MED, 802.1X

Installation

Unpack and inspect contents. Place on stable desk surface.

  1. Connect to network: Use Ethernet cable to connect LAN port to switch/router. For PoE, ensure switch supports 802.3af.
  2. Connect PC (optional): Use second Ethernet cable from PC port to computer.
  3. Connect handset: Plug handset cord into dedicated jack on phone base.
  4. Connect headset (optional): Plug into 3.5mm headset jack.
  5. Apply power: Via PoE or connect external power adapter to DC jack.

WARNING! Use only approved power adapter. Ensure network cables are securely connected.

First-Time Setup

Phone will boot and attempt to obtain network configuration via DHCP.

  1. Check network registration: Observe LCD for IP address and registration status.
  2. Configure SIP accounts: Access web interface (via IP address) or use keypad menu to enter SIP server details provided by your service provider.
  3. Set date and time: Configure via NTP server or manual entry in settings.
  4. Adjust audio settings: Set ringer volume, speaker volume, and headset preferences.
  5. Test call: Make a test call to verify audio quality and registration.

CAUTION! Record SIP credentials in a secure location. Ensure firmware is up to date.

Specifications

Controls and Settings

Access settings via phone keypad menu or web browser interface.

Front Panel: LINE keys (1-4), NAVIGATION cluster (Up/Down/Left/Right, Select), SOFT KEYS, MUTE, HEADSET, SPEAKERPHONE, VOLUME keys, HOLD, TRANSFER, CONFERENCE, REDIAL.

Web Interface: Access via phone's IP address for advanced configuration (SIP, Network, Security, Audio).

Key Settings: Audio (ringer type/volume, mic gain), Network (static/DHCP, VLAN), SIP (server, authentication, codecs), Time (NTP server), Security (admin password, TLS certificates).

Connecting Devices

Network: LAN port to switch. PC: PC port to computer. Headset: 3.5mm jack. Expansion: USB port for VVX EXP module.

  1. Power off phone before connecting additional devices.
  2. For PoE, verify switch capability; otherwise use external adapter.
  3. Use certified Ethernet cables (Cat5e or higher) for Gigabit performance.
  4. For expansion module, connect to USB port before powering phone.

Tip: Label cables for easy identification during maintenance.

Advanced Telephony Features

Supports call hold, transfer, conference, forward, and voicemail.

  1. Make call: Lift handset or press SPEAKERPHONE, dial number.
  2. Answer call: Press flashing LINE key, ANSWER soft key, or lift handset.
  3. Hold: Press HOLD button; resume by pressing same LINE key.
  4. Transfer: During call, press TRANSFER, dial target number, press TRANSFER again.
  5. Conference: During call, press CONFERENCE, dial second party, press CONFERENCE again to merge.
  6. Call forward: Configure via web interface or dial codes (e.g., *72).
  7. Voicemail: Access by pressing MESSAGE key or dialing voicemail number.
  8. Directory: Store contacts locally or sync with LDAP/Exchange.

WARNING! Do not use liquid cleaners on keypad or display. Use soft, dry cloth only.

Accessibility Features

Visual alerts: Flashing LED for incoming calls. Audio: Adjustable ringer volume and tone. Hearing aid compatible (HAC) handset available. Large font display option in settings menu.

Care & Cleaning

Disconnect power before cleaning. Use slightly damp, lint-free cloth for exterior. Do not use abrasive cleaners or sprays.

CAUTION! Avoid moisture entering vents or ports. Keep away from direct heat sources.

Regulatory Information

FCC Part 15: Class A digital device; complies with limits for business environments. CE marked. Polycom and the Polycom logo are trademarks of Polycom, Inc. For support, visit www.polycom.com/support or contact your authorized reseller. Software license terms apply.

Troubleshooting

SymptomPossible CauseCorrective Action
No power/displayPower sourceCheck PoE switch or power adapter connection; try different outlet.
No network registrationNetwork/SIP configVerify Ethernet cable; confirm DHCP enabled; check SIP credentials.
One-way/no audioNetwork/audio settingsCheck firewall/NAT settings; verify audio codecs match provider.
Poor call qualityNetwork congestionEnable QoS on network; check for bandwidth issues.
Phone not upgradingFirmware serverVerify provisioning server URL; check network connectivity to server.

Reset: Press and hold 1, 3, and 5 keys during boot for factory reset (erases all settings).

Service: Contact Polycom support or your service provider. Do not attempt internal repairs.

Polycom VVX 250 Business IP Phone Manual © - All Rights Reserved 2025