Cisco IP 7841 Manual

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 clear 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.

Features at a Glance

Key components: Handset, Speakerphone, Pixel-based display, Message waiting indicator, Volume control, Navigation button, Ethernet ports.

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 for visual voicemail notification
Volume Control	Rockers for adjusting handset, speaker, and ringer volume
Navigation Button	For scrolling through menus and selecting options
Ethernet Ports	10/100 Mbps switch ports for network and PC connection
Power over Ethernet (PoE)	Receives power through Ethernet cable (802.3af)
Headset Port	3.5 mm port for optional headset connection
Programmable Buttons	For line, speed dial, or feature access

Installation

Unpack and inspect contents. Place phone on stable surface near network outlet.

1. Connect to Network: Plug Ethernet cable from switch into phone's SW port.
2. Connect PC (Optional): Plug PC Ethernet cable into phone's PC port.
3. Connect Handset: Insert coiled handset cord into jack on back of phone.
4. Apply Power: Use PoE from switch or connect optional power adapter.

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

First-Time Setup

Phone boots and registers with Cisco Unified Communications Manager.

1. Initial Boot: Phone obtains IP address via DHCP and downloads configuration.
2. Verify Registration: Check for extension number on display.
3. Set User Preferences: Use Settings menu to configure ring tone, contrast, etc.
4. Test Call: Place a test call to verify audio quality and connectivity.

CAUTION! Do not unplug during firmware download. Allow process to complete.

Specifications

• Display: Pixel-based, 2-line capability.
• Network: 10/100 Mbps Ethernet, IEEE 802.3af PoE.
• Audio: Wideband audio support (G.722), Acoustic Echo Cancellation.
• Protocols: SIP (Session Initiation Protocol).
• Power Source: 802.3af PoE or 48 VDC external power adapter.
• Operating Temperature: 32°F to 104°F (0°C to 40°C).
• Supported Codecs: G.711a, G.711μ, G.722, G.729a.
• Dimensions: 8.1 x 10.2 x 6.3 inches (H x W x D).
• Weight: 2.2 lbs (1.0 kg).

Controls and Settings

Access menus via Navigation button. Front Panel: Handset, Speakerphone, Volume rockers, Message Waiting LED, Navigation button, Programmable buttons.

Softkeys: Context-sensitive buttons below display for call functions (Hold, Transfer, etc.).

Settings Menu: Ring Tone selection, Display contrast, Network configuration (view IP, subnet, gateway), Time and Date format, Language (default ENGLISH). Phone Web Interface: Access via IP address for advanced admin settings (requires credentials).

Connecting to Network

Primary connection via Ethernet SW port. Optional PC pass-through via PC port.

1. Ensure network switch supports PoE (802.3af) or have power adapter ready.
2. Use standard CAT5e or higher Ethernet cable.
3. Connect cable from network jack to phone's SW port.
4. For PC, connect cable from phone's PC port to computer's Ethernet port.

Tip: Verify link LED is solid green on Ethernet port after connection.

Basic Operations

Making and receiving calls, hold, transfer, conference.

1. Make Call: Lift handset or press Speakerphone, dial number, press Dial softkey or wait.
2. Answer Call: Lift handset, press Speakerphone, or press Answer softkey.
3. End Call: Hang up handset or press EndCall softkey.
4. Hold: Press Hold softkey during active call.
5. Transfer: During call, press Transfer, dial target number, press Transfer again.
6. Conference: During call, press Conference, dial second party, press Conference again.
7. Redial: Press Redial or select from call history.
8. Adjust Volume: Use Volume rocker during call (handset/speaker) or idle (ringer).

WARNING! Do not use excessive force on buttons or handset cradle.

Advanced Features

Speed Dials: Assign numbers to programmable buttons via web interface or CUCM. Call History: View missed, received, and placed calls via Navigation button. Headset Mode: Enable in Settings for hands-free operation with headset. Do Not Disturb (DND): Activate to silence ringer and send calls to voicemail.

Care & Maintenance

Unplug power before cleaning. Use slightly damp, lint-free cloth. Do not use liquids or aerosols directly on phone.

CAUTION! Avoid extreme temperatures and humidity. Keep vents clear of obstructions.

Regulatory Information

FCC Part 15: Class A digital device; complies with limits for business use. CE Mark: Conforms to European EMC directive. Industry Canada ICES-003. Copyright © Cisco Systems, Inc. For support, visit www.cisco.com or contact Cisco Technical Assistance Center.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display/power	PoE/Power adapter	Check Ethernet cable and switch PoE; try external power adapter.
Phone not registering	Network/DHCP	Verify network connectivity; check DHCP server; confirm CUCM configuration.
No dial tone	Line configuration	Ensure line is assigned in CUCM; check registration status.
Poor audio quality	Network/Codec	Check network for packet loss; verify codec configuration in CUCM.
Buttons not working	Firmware/Configuration	Reset phone; ensure correct firmware and button template loaded.

Reset: Unplug power, wait 10 seconds, reconnect. For factory reset, hold # while plugging in power.

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