Cisco Telephone Manual 7841

The Cisco IP Phone 7841 is a single-line desk phone designed for basic voice communication in business environments. It features a high-quality handset and speakerphone, a pixel-based display, support for Power over Ethernet (PoE), 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 to Network 7. Making and Receiving Calls 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Handset, Speakerphone, Pixel-based display, Message waiting indicator, Navigation cluster, Softkeys.

Feature	Description
Handset	High-quality receiver and transmitter for clear audio
Speakerphone	Full-duplex speakerphone for hands-free conversation
Display	Pixel-based screen for call information and menus
Message waiting indicator	LED light to indicate new voicemail messages
Navigation cluster	Directional pad for menu navigation and volume control
Softkeys	Context-sensitive buttons for call functions
Power over Ethernet (PoE)	Receives power through Ethernet cable (IEEE 802.3af)
Headset port	3.5mm jack for optional headset connection
Network ports	10/100/1000 Ethernet switch with PC port
Security	Support for IEEE 802.1X authentication

Installation

Unpack and inspect contents. Place on stable surface.

Connect to network: Plug Ethernet cable from switch into NETWORK port on phone.
Connect PC (optional): Use second Ethernet cable from PC port to computer.
Connect handset: Insert coiled handset cord into handset jack.
Power the phone: Use PoE from switch or optional power adapter.

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

First-Time Setup

Phone will boot and register with Cisco Unified Communications Manager.

Check network connectivity: Ensure Ethernet link is active (LED illuminated).
Wait for registration: Phone will display extension number when registered.
Set preferences: Use Settings menu to configure ringtone, volume, and display options.
Test call: Lift handset and dial another extension to verify audio.

CAUTION! Do not disconnect during boot process. Allow phone to complete startup.

Specifications

Display: Pixel-based, 3.5-inch monochrome.
Network: 10/100/1000 Ethernet with integrated switch.
Audio: Wideband audio support (G.722), acoustic echo cancellation.
Power: IEEE 802.3af PoE or 12V DC power adapter.
Protocols: SIP (Session Initiation Protocol) and SCCP (Skinny Call Control Protocol).
Supported codecs: G.711, G.729, G.722, iLBC.
Operating Temp: 32°F to 104°F (0°C to 40°C).
Humidity: 10% to 95% non-condensing.

Controls and Settings

Access menus via NAVIGATION cluster. Front buttons: MESSAGE, HOLD, TRANSFER, CONFERENCE, VOLUME.

Softkeys: Context-sensitive (NewCall, More, Dir, CFwdAll, etc.).

Settings: Ringtone selection, display contrast, network configuration, date/time format. Audio: Handset volume, speakerphone volume, ringer volume, headset settings. Network: View IP address, subnet mask, gateway, DHCP status. Security: Configure IEEE 802.1X credentials if required.

Connecting to Network

Network: NETWORK port to switch. PC: PC port to computer.

Ensure switch supports PoE or connect power adapter.
Use Category 5e or higher Ethernet cables.
Phone will obtain IP address via DHCP by default.
Verify connectivity by checking for dial tone.

Tip: Use cable management clip to organize cords.

Making and Receiving Calls

Basic call functions: dial, answer, hold, transfer, conference.

Make call: Lift handset or press NewCall, dial number, press Dial softkey.
Answer call: Lift handset or press Answer softkey.
Hold call: Press HOLD button; resume with Resume softkey.
Transfer call: Press TRANSFER, dial target, press Transfer again.
Conference call: Press CONFERENCE during active call, dial participant, press Conference again.
Voicemail: Press MESSAGE button or dial voicemail access number.
Redial: Press Redial softkey or dial **.
Call forward: Press CFwdAll softkey, enter destination number.

WARNING! Emergency calls may require direct dialing; verify local emergency number.

Accessibility Features

Visual alerts: Flashing message waiting indicator. Audio adjustments: Separate volume controls for handset, speaker, ringer. Hearing aid compatible: Handset meets TIA-1083 standard. Large font: Option to increase text size on display.

Care & Cleaning

Unplug power before cleaning. Use soft, dry cloth; avoid liquids and abrasive cleaners.

CAUTION! Do not use aerosol sprays; keep away from excessive dust and moisture.

Regulatory Information

FCC Part 15: Class A digital device; complies with limits for business use. CE marked for European compliance. Industry Canada ICES-003. Copyright © Cisco Systems, Inc. All trademarks are property of their respective owners. For support, visit www.cisco.com or contact Cisco Technical Assistance Center.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	PoE/Power adapter	Check Ethernet cable; verify switch PoE; try power adapter.
No dial tone	Network/Registration	Check network connection; verify phone is registered with CUCM.
Poor audio quality	Network/Handset	Check network jitter/latency; replace handset cord.
Display blank	Power/Contrast	Check power; adjust display contrast in settings.
Cannot make calls	Configuration	Verify dial plan; check for dial tone; contact administrator.

Reset: Press and hold # key during boot to reset to factory defaults.

Service: Cisco Technical Assistance Center; www.cisco.com/go/support