Cisco Phones User Manual CP 8851

The Cisco CP 8851 is a high-performance, full-featured IP phone designed for business environments. It features a large color display, support for up to 10 lines, integrated Gigabit Ethernet, PoE support, HD voice quality, Bluetooth and Wi-Fi capabilities (on select models), and a robust set of telephony features. 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: Large color LCD display, Handset, Speakerphone, Navigation cluster, Softkeys, Volume rocker, Headset port, Ethernet ports, Power connector.

Feature	Description
Display	5-inch high-resolution color LCD with backlight
Lines/Speed Dials	Supports up to 10 lines and programmable speed dials
Network	Dual Gigabit Ethernet ports with PoE (802.3af)
Audio	HD wideband audio, built-in speakerphone, headset port
Wireless	Optional integrated Bluetooth and Wi-Fi (model dependent)
Expansion Module	Support for Cisco Key Expansion Module (up to 2)
Conference	Built-in conference bridge for multi-party calls
Security	Encrypted communications, secure boot, device authentication
Power	Power over Ethernet (PoE) or external power adapter
Programmable Keys	Dedicated and soft keys for line, speed dial, and feature access

Installation

Unpack and inspect contents. Place on stable desk surface.

Connect to Network: Use Ethernet cable to connect the PC port to your computer and the Network port to your LAN switch.
Connect Handset: Plug the handset cord into the dedicated jack on the phone.
Connect Headset: Optional headset can be plugged into the headset port.
Power the Phone: Use Power over Ethernet (PoE) from your switch or connect the external power adapter to the power port and an AC outlet.

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

First-Time Setup

Phone will boot and attempt to connect to the network and Cisco Unified Communications Manager (CUCM).

Network Configuration: Typically automatic via DHCP. Check with your administrator for static IP if required.
Phone Registration: The phone should auto-register with CUCM. If not, enter the TFTP server address provided by your administrator.
User Configuration: Log in to the phone's web interface or use the phone keypad to set user preferences, language, and time zone.
Test Basic Functions: Make a test call to verify audio quality and feature functionality.

CAUTION! Do not unplug the phone during firmware upgrades. Ensure proper ventilation around the device.

Specifications

Model: Cisco Unified IP Phone 8851.
Display: 5-inch color TFT LCD (480 x 272 pixels).
Network Interfaces: Dual 10/100/1000BASE-T Ethernet ports.
Power: IEEE 802.3af PoE or 48V DC external power adapter.
Audio Codecs: G.711, G.722, G.729a, iLBC, Opus.
Protocols: SIP (Session Initiation Protocol), SCCP (Skinny Client Control Protocol).
Supported Features: Hold, Transfer, Conference, Forward, Park, Do Not Disturb, Message Waiting Indicator.
Operating Temperature: 32°F to 104°F (0°C to 40°C).
Compliance: RoHS, WEEE, FCC Part 15 Class B, UL/CSA.

Controls and Settings

Access settings via the phone's LCD menu or web-based administration interface.

Front Panel: NAVIGATION CLUSTER (Up/Down/Left/Right, Select), SOFTKEYS, MUTE, HEADSET, SPEAKERPHONE, VOLUME ROCKER, MESSAGES, DIRECTORY, HELP, APPLICATIONS.

Basic Settings: Language, Time/Date, Ringtone, Screen Brightness, Contrast.
Call Settings: Forward All, Do Not Disturb, Call Waiting, Auto Answer.
Network Settings: View IP Address, Subnet Mask, Gateway, DNS (via Settings > Network Configuration).
Audio Settings: Handset/Speaker/Headset volume, Ringer volume, Audio codec preference.

Connecting Devices

Network: Use Ethernet cables. Accessories: Headset, Expansion Module.

Turn off phone before connecting accessories if possible.
For Expansion Module: Connect to the EXPANSION MODULE port on the back of the phone.
For Wi-Fi/Bluetooth: Enable in Network Settings if supported by your model.
Verify connections by checking the phone status or web interface.

Tip: Use certified Cisco headsets and accessories for optimal compatibility.

Advanced Telephony Features

Supports a wide range of business telephony features.

Placing a Call: Lift handset or press SPEAKERPHONE/HEADSET, dial number.
Answering a Call: Lift handset, press SPEAKERPHONE, or press the flashing line key.
Hold: Press HOLD softkey. Resume by pressing RESUME or the held line key.
Transfer: During a call, press TRANSFER, dial the target number, press TRANSFER again to complete.
Conference: During a call, press CONFERENCE, dial the second party, press CONFERENCE again to merge.
Forwarding: Press CFwdALL softkey, enter destination number. Press again to cancel.
Park: Press the Park softkey or dial the park retrieval prefix to park a call.
Directory: Press DIRECTORY to access personal, corporate, and call history directories.

WARNING! Do not use excessive force on keys or display. Use the web interface for complex configurations.

Accessibility Features

Hearing Aid Compatibility (HAC): Meets FCC requirements. Visual Alerts: Flashing LED for incoming calls (can be enabled). High-Contrast Display: Adjustable in settings. TTY Support: Can be connected via optional TTY device.

Care & Cleaning

Disconnect power before cleaning. Use a soft, dry, lint-free cloth. For stubborn marks, slightly dampen the cloth with water only. Do not use cleaners, solvents, or aerosols.

CAUTION! Never spray liquids directly onto the phone. Avoid getting moisture into openings.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. This device complies with Industry Canada license-exempt RSS standard(s). Copyright © 2023 Cisco Systems, Inc. All rights reserved. Cisco and the Cisco logo are trademarks of Cisco Systems, Inc. For support, visit www.cisco.com/go/support or contact your system administrator.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Phone does not power on	Power source	Check PoE switch power or ensure power adapter is securely connected and outlet is live.
No network connectivity	Cables/DHCP	Verify Ethernet cables are firmly plugged in. Check for DHCP server availability on network.
No dial tone	Registration/Line	Check phone registration status on CUCM. Verify line is assigned and active.
Poor audio quality	Network/Codec	Check network for packet loss/jitter. Verify correct audio codec is negotiated.
Display is blank or dim	Settings/Power	Adjust brightness in settings. Ensure phone is receiving adequate power.
Cannot access web interface	IP/HTTP settings	Verify phone's IP address. Ensure HTTP/HTTPS service is enabled in configuration.

Reset: Press and hold # key while powering on for hardware reset (erases local settings). Use with caution.

Service: Contact your network administrator or Cisco Technical Support. www.cisco.com/go/support