Cisco Phones User Manual CP-8841

The Cisco CP-8841 is a high-performance, multi-line IP phone designed for medium to high call volume environments. It features a large color display, support for up to 12 lines, built-in Gigabit Ethernet, Power over Ethernet (PoE) support, HD voice quality, 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. Using Phone 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, Soft keys, Line keys, Ethernet ports, Headset port.

Feature	Description
Display	5-inch color LCD with backlight
Lines	Supports up to 12 lines with dedicated buttons
Network	Dual Gigabit Ethernet ports (LAN and PC)
Power	Power over Ethernet (PoE) or external power adapter
Audio	HD voice quality, built-in speakerphone, headset port
Conference	Built-in conference bridge for up to 4 parties
Volume Control	Dedicated buttons for handset, headset, speaker, ringer
Messages	Integrated message waiting indicator
Hold/Resume	Dedicated hold and resume buttons
Transfer	One-touch call transfer functionality

Installation

Unpack and inspect contents. Place on stable surface.

Connect to network: Use Ethernet cable to connect LAN port to switch/router.
Connect PC: Use second Ethernet cable from PC port to computer (optional).
Power connection: Use PoE from switch or connect external power adapter.
Connect handset: Plug handset cord into handset port.
Connect headset: Plug headset into headset port (optional).

WARNING! Use only approved power adapter. Ensure network cables are properly seated.

First-Time Setup

Power on phone; follow on-screen prompts.

Network registration: Phone will automatically obtain IP address via DHCP.
Phone configuration: Contact administrator for TFTP server address and configuration.
Set language: In Settings menu, select preferred language.
Adjust settings: Configure time/date, ring tones, display brightness.
Test call: Make test call to verify audio quality and connectivity.

CAUTION! Do not disconnect during firmware upgrade. Ensure stable network connection.

Specifications

Display: 5-inch color LCD, 480 x 272 pixels.
Network: Dual 10/100/1000 Mbps Ethernet ports.
Protocols: SIP, SCCP, IEEE 802.3af PoE.
Audio Codecs: G.711, G.722, G.729, iLBC.
Power: PoE (Class 3) or 48V DC external power adapter.
Dimensions: 9.0" x 11.0" x 6.5" (W x H x D).
Weight: 3.5 lbs (1.6 kg).
Operating Temp: 32°F to 104°F (0°C to 40°C).

Controls and Settings

Access settings via Settings button or web interface.

Front Panel: LCD display, Navigation cluster, Soft keys, Line keys, Hold, Transfer, Conference, Speakerphone, Mute, Volume controls, Headset, Messages.

Settings Menu: Network configuration, Phone settings, Sound settings, Display settings, User preferences.

Network: IP configuration, VLAN settings, TFTP server. Phone: Line configuration, speed dials, call forwarding. Sound: Ring tones, volume levels, audio quality. Display: Brightness, contrast, screen timeout. User: Language, time format, password.

Connecting Devices

Network: LAN port to switch. PC: PC port to computer. Accessories: Headset port, handset port.

Turn off phone before connecting accessories.
Match cables to ports (Ethernet to LAN/PC ports).
Use approved Cisco accessories for optimal performance.

Tip: Use Cat5e or better Ethernet cables for Gigabit performance.

Using Phone Features

Supports basic and advanced telephony features.

Make call: Lift handset or press Speakerphone, dial number.
Answer call: Lift handset, press Speakerphone, or press Answer soft key.
Hold call: Press Hold button; resume with Resume button.
Transfer call: Press Transfer, dial target number, press Transfer again.
Conference call: Press Conference, dial first party, press Conference again, dial second party.
Voicemail: Press Messages button to access voicemail.
Speed dial: Program speed dials in Settings menu.
Call forwarding: Enable in Phone settings menu.

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

Accessibility Features

Visual alerts: Flashing LED for incoming calls. Audio adjustments: Adjustable volume for ringer, handset, speaker. TTY support: Compatible with TTY devices. Large font: Option for larger display text in settings.

Care & Cleaning

Unplug before cleaning. Use slightly damp cloth; no liquids or aerosols.

CAUTION! Do not use abrasive cleaners. Avoid getting moisture in openings.

Regulatory Information

FCC Part 15: Class A digital device; complies with interference limits for business use. CE marked for European compliance. Copyright © 2025 Cisco Systems, Inc. All rights reserved. For support, visit www.cisco.com or contact Cisco Technical Assistance Center.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power source	Check PoE switch or power adapter connection; verify cable.
No network connection	Cable/config	Check Ethernet cable; verify network settings; restart phone.
No audio	Volume/mute	Check volume settings; ensure mute is off; test with headset.
Display issues	Settings/power	Adjust brightness; restart phone; check for firmware updates.
Call quality problems	Network/QoS	Check network congestion; verify QoS settings; test with different codec.

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

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