Cisco 8851 Phone Manual

The Cisco 8851 is a feature-rich IP phone designed for business environments, offering high-quality audio, a large color display, support for multiple lines, and integration with Cisco Unified Communications Manager. It includes advanced features like HD voice, Bluetooth support, Gigabit Ethernet, and Power over Ethernet (PoE). 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 Phone Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Large color display, Handset, Speakerphone, Bluetooth support, Gigabit Ethernet ports, Headset port, USB port.

Feature	Description
Display	5-inch color LCD with touch support
Audio	HD voice with wideband audio support
Network	Dual Gigabit Ethernet ports with PoE
Bluetooth	Support for wireless headsets and devices
USB Port	For accessories and charging
Headset Port	Standard 3.5mm headphone jack
Conference	Built-in speakerphone with echo cancellation
Lines	Support for up to 8 lines
Security	Encrypted communications support
Power	PoE (802.3af) or external power adapter

Installation

Unpack and inspect contents. Place on stable surface.

Connect network cable: Use Ethernet cable to connect phone to network switch.
Connect handset: Plug handset cord into handset port.
Connect optional headset: Plug into headset port or pair via Bluetooth.
Power the phone: Use PoE from switch or connect external power adapter.

WARNING! Use only approved power sources. Ensure cables are not pinched or damaged.

First-Time Setup

Power on phone; follow on-screen prompts.

Network registration: Phone will automatically attempt to register with Cisco Unified Communications Manager.
Configure settings: Use phone menu to set language, time zone, and user preferences.
Set up voicemail: Follow prompts to configure voicemail access.
Test features: Make test call to verify audio quality and functionality.

CAUTION! Ensure phone is placed on a stable, flat surface to prevent falling.

Specifications

Display: 5-inch color LCD, 480 x 272 resolution.
Audio Codecs: G.711, G.722, G.729, iLBC.
Network: Dual 10/100/1000 Ethernet ports, 802.3af PoE.
Bluetooth: Version 3.0+EDR support.
USB: USB 2.0 port for accessories.
Protocols: SIP, SCCP, 802.1X, TLS, SRTP.
Power Consumption: Maximum 6.5W (PoE).
Operating Temp: 32°F to 104°F (0°C to 40°C).

Controls and Settings

Access menu via Settings button. Front Panel: Speakerphone, Mute, Volume controls, Navigation cluster.

Softkeys: Line keys with programmable functions for calls, hold, transfer, etc.

Display Settings: Brightness, contrast, backlight timeout. Audio Settings: Ringer volume, handset/speakerphone gain, tone settings. Network Settings: IP configuration, VLAN, QoS. Bluetooth: Pairing and management. Security: Phone lock, password settings.

Connecting Devices

Network: Ethernet cable to switch port. Headset: Wired via headset jack or wireless via Bluetooth. USB: For compatible accessories.

Turn off phone before connecting accessories.
Match cables to correct ports.
For Bluetooth, enable pairing mode on device and select from phone menu.

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

Using Phone Features

Supports calling, conferencing, transfer, hold, and advanced telephony features.

Make call: Dial number using keypad or select from directory.
Answer call: Press Answer softkey or lift handset.
Hold: Press Hold button to place call on hold.
Transfer: During call, press Transfer, dial target, then complete transfer.
Conference: During call, press Conference, add participants.
Voicemail: Press Messages button to access voicemail.
Directory: Access corporate and personal directories.
Settings: Customize via Settings menu.

WARNING! Do not expose phone to liquids. Keep ventilation openings clear.

Accessibility Features

Visual Alerts: Flashing LED for incoming calls. Audio Adjustments: Customizable ringer tones and volumes. Hearing Aid Compatible: Handset supports hearing aids. Large Text: Option for larger font on display.

Care & Cleaning

Unplug before cleaning. Use soft, dry cloth only; no liquids or abrasive cleaners.

CAUTION! Do not spray cleaners directly on phone. Avoid extreme temperatures and humidity.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Cisco Systems, Inc. All rights reserved. For support, visit www.cisco.com or contact Cisco Technical Assistance Center. UL/CSA certified. Contains FCC ID: XYZ-123456.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power source/connection	Check PoE switch or power adapter; ensure cable is secure.
No network connection	Cable/configuration	Verify Ethernet cable; check network settings and VLAN configuration.
No audio	Volume/mute settings	Adjust volume; check mute status; verify handset connection.
Cannot register	Network/configuration	Verify IP address; check CUCM configuration; restart phone.
Bluetooth not working	Pairing/interference	Re-pair device; ensure within range; reduce interference.

Reset: Press and hold # key during boot for factory reset (use caution).

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