Cisco CP 6821 Manual

The Cisco CP 6821 is a conference phone designed for medium to large meeting rooms, offering high-quality audio with full-duplex speakerphone, wideband audio support, and advanced noise reduction. It features a color touchscreen, support for up to four SIP lines, Bluetooth connectivity, and integration with Cisco Unified Communications Manager. 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. Conference Calling 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Color touchscreen, Full-duplex speaker, Microphone array, Ethernet port, Bluetooth antenna, Handset port, Headset port.

Feature	Description
Color touchscreen	4.3-inch display for call management and settings
Full-duplex speaker	Echo-free audio for natural conversations
Microphone array	360-degree coverage with noise reduction
Ethernet port	For network connection and Power over Ethernet (PoE)
Bluetooth	For wireless headset and smartphone pairing
Handset port	For optional wired handset
Headset port	For wired headset connection
Volume controls	Adjust speaker and microphone levels
MUTE	Mutes microphone
POWER	Turns phone on/off

Installation

Unpack and inspect contents. Place on stable conference table.

Connect to network: Use Ethernet cable to connect to PoE switch or injector.
Connect optional handset: Plug handset into dedicated port.
Connect optional headset: Plug headset into headset port.
Power on: Phone will boot via PoE or optional power adapter.

WARNING! Ensure stable placement; avoid locations with excessive vibration or noise.

First-Time Setup

Power on phone; follow on-screen prompts.

Network configuration: Phone will attempt DHCP; configure manually if needed via touchscreen.
Register with CUCM: Enter server address and credentials as provided by administrator.
Set language: In SETTINGS menu, select preferred language.
Adjust audio settings: Use SETTINGS to calibrate microphone and speaker levels.

CAUTION! Use only approved power sources and cables.

Specifications

Display: 4.3-inch color touchscreen.
Audio: Full-duplex wideband, HD Voice support.
Microphone: 360-degree array with Acoustic Fence technology.
Connectivity: 10/100/1000 Ethernet, Bluetooth 4.2, USB 2.0.
Protocols: SIP, SCCP.
Power: IEEE 802.3af PoE or optional power adapter.
Supported Codecs: G.711, G.722, G.729, Opus.
Operating Temp: 32°F to 104°F (0°C to 40°C).

Controls and Settings

Access settings via touchscreen or web interface. Front Panel: POWER, Volume up/down, MUTE.

Touchscreen: Home screen with active calls, contacts, history. Settings: Network, Audio, Bluetooth, Security.

Audio: Microphone gain, Speaker volume, Equalizer presets (Standard, Voice, Music). Network: IP configuration, VLAN, QoS. Security: Admin password, HTTPS, Certificate management.

Connecting Devices

Network: Ethernet cable. Bluetooth: Pair headset or smartphone. Headset: Wired via headset port.

Turn off phone before connecting wired accessories.
For Bluetooth: Enable in SETTINGS > Bluetooth > Add device.
For headset: Plug in; configure in SETTINGS > Audio > Headset.

Tip: Use shielded cables for best audio quality and interference reduction.

Conference Calling

Supports multi-party conferences with up to 4 simultaneous calls.

Make call: Dial number or select from contacts.
Add participants: From active call, tap "Add Call" and dial next participant.
Merge calls: Tap "Merge" to create conference.
Manage conference: Use touchscreen to mute/unmute participants, adjust volumes.
Hold/Resume: Tap Hold button during call.
Transfer: Tap Transfer during call; enter target number.
Record: Enable recording via touchscreen if supported by system.

WARNING! Ensure adequate ventilation; do not block microphone array.

Accessibility Features

Visual alerts: LED indicators for mute, active call. Audio adjustments: Equalizer presets for hearing assistance. Screen settings: Adjust contrast, font size.

Care & Cleaning

Unplug before cleaning. Use dry, lint-free cloth; for stubborn marks, dampen cloth with water only.

CAUTION! Do not use abrasive cleaners, solvents, or sprays directly on device.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for commercial use. CE, RoHS compliant. Copyright © 2025 Cisco Systems, Inc. All trademarks are property of their respective owners. For support, visit www.cisco.com/support or contact 1-800-553-2447.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	PoE/Power adapter	Check Ethernet cable; try different PoE switch port; verify power adapter connection.
No audio	Volume/Mute settings	Check volume levels; ensure mute is off; verify audio settings in menu.
Cannot register	Network/Configuration	Verify IP address; check CUCM server address and credentials; restart phone.
Poor call quality	Network/Environment	Check network bandwidth; ensure phone is away from noise sources; run audio calibration.
Bluetooth not pairing	Distance/Interference	Ensure device is in pairing mode; move closer; reduce wireless interference.

Reset: Settings > System > Reset to factory defaults.

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