CP 8851 Cisco Phone Manual

The Cisco CP 8851 is a full-featured VoIP desk phone designed for business environments, offering high-definition voice quality, a large color display, support for multiple lines, Power over Ethernet (PoE), Gigabit Ethernet ports, and integration with Cisco Unified Communications Manager. Below are key sections covering features, installation, configuration, 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 Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Large color display, Handset with HD audio, Speakerphone, Navigation cluster, Soft keys, Ethernet ports, Headset jack.

Feature	Description
Display	5-inch color LCD with touch sensitivity
Audio	HD wideband audio on handset and speakerphone
Network	Dual Gigabit Ethernet ports (LAN, PC)
Power	IEEE 802.3af PoE or optional power adapter
Lines	Support for up to 12 lines/accounts
Headset	Integrated headset port (EHS support)
Bluetooth	Optional for wireless headset connectivity
Security	802.1X authentication, encrypted signaling/media
Conference	Built-in conference bridge capabilities
Messages	Integrated visual voicemail

Installation

Unpack and inspect contents. Place phone on stable surface.

Connect to network: Use Ethernet cable from switch to phone's LAN port.
Connect computer: Use second Ethernet cable from phone's PC port to computer.
Power the phone: Use PoE from switch or connect optional power adapter.
Connect handset: Plug coiled handset cable into handset port.
Optional headset: Plug into headset jack on back of phone.

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

First-Time Setup

Power on phone; follow on-screen prompts.

Network registration: Phone will attempt to obtain IP address and register with Cisco Unified Communications Manager.
Configure settings: Use phone's settings menu or web interface to set language, time zone, ringtones.
Line configuration: Assign extension numbers and configure line keys as needed.
Test call: Place test call to verify audio quality and functionality.

CAUTION! Do not expose phone to liquids or extreme temperatures.

Specifications

Display: 5-inch color TFT LCD (480 x 272 pixels).
Audio Codecs: G.711, G.722, G.729, iLBC, Opus.
Network: 10/100/1000 Mbps Ethernet, IEEE 802.3af PoE.
Protocols: SIP, SCCP, HTTP/HTTPS, TFTP, LDAP.
Physical: Dimensions: 9.1" x 10.9" x 6.3"; Weight: 3.3 lbs.
Environment: Operating temp: 32°F to 104°F (0°C to 40°C).
Power Consumption: Max 6.5W (PoE) or 12V DC adapter.
Compliance: FCC Part 15, CE, RoHS, WEEE.

Controls and Settings

Access menu via Settings button. Front Panel: Mute, Speakerphone, Volume rocker, Navigation cluster, Soft keys.

Display: Shows call information, directories, settings. Soft keys: Context-sensitive for call functions (Hold, Transfer, Conference).

Settings: Network configuration, Audio settings (ringer, volume), Display settings (brightness, contrast), Phone model information, Security settings. Web Interface: Access via IP address for advanced configuration.

Connecting Devices

Network: LAN port to switch. Computer: PC port to computer. Headset: Standard 3.5mm jack.

Ensure phone is powered off before connecting devices.
Use Cat5e or better Ethernet cables for network connections.
For PoE, verify switch provides adequate power (IEEE 802.3af).
Connect headset for hands-free operation.

Tip: Label cables for easy identification during maintenance.

Advanced Features

Supports advanced calling features and integrations.

Call Handling: Hold, Transfer, Conference, Park.
Directories: Corporate directory, personal address book, call history.
Bluetooth: Pair with compatible headsets (optional module required).
XML Services: Display custom web applications and information.
Security: Enable device and media encryption for secure calls.
Quality Reporting: Built-in diagnostics and call quality metrics.
Power Save: Enable energy-saving modes during off-hours.
Firmware Updates: Automatic or manual via TFTP/HTTP.

WARNING! Only install firmware from trusted sources. Backup configuration before updates.

Accessibility Features

Hearing Aid Compatibility: M3/T3 rated. Visual Alerts: Flashing LED for incoming calls. Audio Adjustment: Customizable ringer and volume controls. Large Font: Option for larger text on display.

Care & Cleaning

Unplug power before cleaning. Use slightly damp, lint-free cloth; avoid abrasive cleaners.

CAUTION! Do not use alcohol, ammonia, or harsh chemicals on display or casing.

Regulatory Information

FCC Part 15: Class A digital device; complies with limits for business environments. CE Mark: Complies with European directives. Copyright © 2023 Cisco Systems, Inc. All rights reserved. For support, visit www.cisco.com or contact Cisco Technical Assistance Center.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Phone not powering on	Power source/cable	Check PoE switch or power adapter; verify Ethernet cable is connected properly.
No network registration	IP configuration	Verify network settings; check DHCP server; confirm VLAN configuration.
No audio on calls	Audio path/volume	Check handset connection; adjust volume; verify codec configuration.
Display issues	Settings/cable	Adjust brightness/contrast; reboot phone; check for loose internal connections.
Cannot make/receive calls	Registration/line config	Verify phone is registered; check line configuration in CUCM; test with another phone.

Reset: Press and hold # key during boot for factory reset (erases all configuration).

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