Cisco Phone Manual Model CP-8851

The Cisco CP-8851 is a full-featured conference phone designed for medium to large meeting rooms, offering high-quality audio with 360-degree coverage, a 5-inch color touchscreen, support for up to 14 microphones, and integration with Cisco Unified Communications Manager. It supports wideband audio, Bluetooth for mobile device connectivity, and includes advanced noise reduction and echo cancellation. 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. Using Advanced Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 5-inch color touchscreen, 360-degree microphone array, Bluetooth module, Ethernet port, USB port, headset port, and built-in speaker.

Feature	Description
Microphone Array	14 built-in microphones for 360-degree coverage
Touchscreen Display	5-inch color LCD for call management and settings
Bluetooth Connectivity	For connecting mobile devices and headsets
Ethernet Port	For network connection and Power over Ethernet (PoE)
USB Port	For future expansions and accessories
Headset Port	3.5mm jack for wired headset connection
Speaker	High-quality wideband speaker for clear audio output
Noise Reduction	Advanced algorithms to reduce background noise
Echo Cancellation	Full-duplex acoustic echo cancellation
Conference Controls	Mute, volume adjustment, and call management buttons

Installation

Unpack and inspect contents. Place on stable conference table.

Connect to network: Use Ethernet cable to connect to PoE switch or injector.
Power on: Phone powers up via PoE; ensure network connection is active.
Position phone: Place centrally in room for optimal microphone coverage.
Connect optional devices: Attach headset to 3.5mm jack if needed.

WARNING! Ensure proper ventilation; do not block vents. Use only approved PoE sources.

First-Time Setup

Power on phone; follow on-screen prompts.

Network configuration: Phone may auto-configure via DHCP; check IP address on screen.
Register with CUCM: Enter server details provided by administrator.
Set language: In Settings menu, select preferred language (default ENGLISH).
Adjust audio settings: Configure microphone sensitivity and speaker volume.
Pair Bluetooth: Enable Bluetooth and pair with mobile device if needed.

CAUTION! Handle touchscreen with care; use soft cloth for cleaning.

Specifications

Display: 5-inch color touchscreen, 480 x 272 pixels.
Audio: Wideband audio support (G.722), full-duplex speakerphone.
Microphones: 14 microphones with 360-degree coverage.
Connectivity: 10/100/1000 Ethernet, Bluetooth 4.2, USB 2.0.
Power: IEEE 802.3af PoE or external power adapter (sold separately).
Supported Protocols: SIP, SCCP, H.323.
Operating Temperature: 32°F to 104°F (0°C to 40°C).
Dimensions: 9.5" x 9.5" x 2.5" (241 mm x 241 mm x 64 mm).

Controls and Settings

Access settings via touchscreen or web interface. Physical buttons: MUTE, VOLUME UP/DOWN, NAVIGATION cluster.

Touchscreen: Home screen shows calls, contacts, settings. Swipe for additional options.

Audio Settings: Microphone gain, speaker volume, noise reduction level. Network Settings: IP configuration, VLAN, QoS. Bluetooth: Pair/unpair devices, enable/disable. Display: Brightness, screen timeout, wallpaper. System: Language, date/time, firmware update.

Connecting Devices

Network: Ethernet cable to PoE switch. Bluetooth: For mobile devices and headsets. USB: For future accessories.

Turn off phone before connecting wired accessories.
Pair Bluetooth devices via Settings > Bluetooth.
Connect headset to 3.5mm jack for private listening.

Tip: Use certified cables and accessories for optimal performance.

Using Advanced Features

Supports conference calls, Bluetooth calling, and integration with UC platforms.

Make call: Dial number on keypad or select contact from directory.
Conference call: Use "Conference" button to add multiple participants.
Bluetooth calling: Pair phone with mobile device to make/receive mobile calls.
Call hold/transfer: Use on-screen options during active call.
Directory access: Sync with corporate directory via LDAP or local contacts.
Firmware update: Check for updates via web interface or CUCM.
Noise reduction: Adjust in Settings > Audio for noisy environments.

WARNING! Do not expose to liquids; keep away from heat sources.

Accessibility Features

Visual alerts: Flashing LED for incoming calls. Audio adjustments: Customizable volume levels for hearing impaired. Screen reader: Optional text-to-speech for visually impaired users.

Care & Cleaning

Unplug before cleaning. Use dry, soft cloth for screen and body; avoid abrasive cleaners.

CAUTION! Do not use liquids or aerosols; keep vents clear of dust.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for commercial use. CE marked for European compliance. Copyright © 2025 Cisco Systems, Inc.; trademarks owned by Cisco. For support, visit www.cisco.com/support or contact 1-800-553-2447.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	PoE issue or cable	Check Ethernet cable; try external power adapter; verify PoE switch.
No audio	Mute or volume settings	Check mute status; adjust volume; verify audio settings.
Poor call quality	Network or microphone	Check network QoS; adjust microphone sensitivity; reduce background noise.
Bluetooth not pairing	Distance or interference	Ensure device is in pairing mode; move closer; reduce interference.
Screen unresponsive	Calibration or software	Restart phone; recalibrate touchscreen via settings; update firmware.

Reset: Settings > System > Reset to factory defaults if needed.

Service: 1-800-553-2447; www.cisco.com/support