Cisco IP Phone 7811 User Manual

The Cisco IP Phone 7811 is a single-line business IP phone designed for basic voice communication in enterprise environments. It features a monochrome display, dedicated hold and transfer buttons, support for Power over Ethernet (PoE), 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 to Network 7. Making and Receiving Calls 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Monochrome LCD display, Handset, Ethernet ports, Power adapter port, Volume control, Dedicated feature buttons.

Feature	Description
LCD Display	2-line monochrome display for call information and status
Handset	Standard handset with receiver and microphone
Network Ports	10/100 Mbps Ethernet with PoE support (802.3af)
Volume Control	Roller for adjusting handset, speaker, and ringer volume
Feature Buttons	Hold, Transfer, Messages, Settings, and Navigation
Headset Port	2.5mm port for optional headset connection
Power Port	For external power adapter if PoE not available
Message Waiting Indicator	LED for visual voicemail notification
Speakerphone	Full-duplex speakerphone for hands-free calls
Security	Support for secure voice communications

Installation

Unpack and inspect contents. Place on stable surface.

Connect to network: Use Ethernet cable to connect phone to switch port.
Connect handset: Plug handset cord into jack on back of phone.
Power the phone: Use PoE from switch or connect external power adapter.
Verify startup: Phone should display startup sequence and register with network.

WARNING! Use only approved power adapters. Ensure network cable is securely connected.

First-Time Setup

Phone will auto-configure when connected to network with Cisco Unified Communications Manager.

Network registration: Phone obtains IP address and downloads configuration automatically.
Verify extension: Check display for assigned phone number and user information.
Set preferences: Use Settings button to configure time, date, ring tone, and volume.
Test call: Make a test call to verify audio quality and functionality.

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

Specifications

Display: 2-line monochrome LCD with backlight.
Network: 10/100 Mbps Ethernet, IEEE 802.3af PoE.
Audio: G.711, G.729 audio codecs, full-duplex speakerphone.
Protocols: SIP, SCCP (Skinny Client Control Protocol).
Power: PoE (Class 2) or 48V DC external power adapter.
Buttons: Hold, Transfer, Messages, Settings, Navigation, Volume.
Connectors: Two RJ-45 Ethernet, RJ-9 handset, 2.5mm headset, DC power.
Dimensions: 8.3 x 9.1 x 7.1 inches (210 x 230 x 180 mm).
Operating Temp: 32°F to 104°F (0°C to 40°C).

Controls and Settings

Access settings via Settings button. Front Panel: Volume roller, Navigation buttons, Feature buttons.

Button Functions: Hold (place call on hold), Transfer (transfer call), Messages (access voicemail), Settings (phone configuration), Navigation (scroll through menus).

Settings Menu: Time/Date, Ring Tone, Display Contrast, Network Configuration, Security Settings. Audio: Adjust handset, speaker, and ringer volume using volume roller. Network: View IP address, subnet mask, gateway (via Settings > Network Configuration).

Connecting to Network

Ethernet: Use CAT5e or higher cable. PoE: Ensure switch provides 802.3af power.

Connect phone to network switch using Ethernet cable.
Connect computer to phone's PC port if daisy-chaining.
Power via PoE or external adapter.
Wait for phone to register (display shows extension number).

Tip: Use shielded cables in environments with high electromagnetic interference.

Making and Receiving Calls

Basic call functions for daily use.

Make call: Lift handset or press Speaker button, dial number, wait for connection.
Answer call: Lift handset or press Speaker button when phone rings.
End call: Replace handset or press Speaker button again.
Hold call: Press Hold button; resume by pressing Hold again or lifting handset.
Transfer call: During active call, press Transfer, dial target number, press Transfer again.
Conference call: During active call, press Transfer, dial second party, press Conference.
Voicemail: Press Messages button to access voicemail system.
Redial: Press Redial button or dial ** to call last dialed number.

WARNING! Emergency calls may require direct dialing without prefixes. Know your local emergency number.

Accessibility Features

Visual Alerts: Message waiting indicator LED. Audio Adjustments: Volume control for handset, speaker, and ringer. Hearing Aid Compatible: Handset meets FCC requirements for hearing aid compatibility.

Care & Cleaning

Unplug power before cleaning. Use slightly damp cloth for exterior; dry thoroughly.

CAUTION! Do not use abrasive cleaners or solvents. Keep liquids away from openings.

Regulatory Information

FCC Part 15: Class A digital device; complies with limits for business environments. FCC Part 68: Registered for connection to telephone network. UL/CSA Listed: Meets safety standards. For support, visit www.cisco.com or contact Cisco Technical Assistance Center. Copyright © 2025 Cisco Systems, Inc. All rights reserved.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display/power	Power source	Check PoE switch or power adapter connection; verify cable.
No dial tone	Network/configuration	Check Ethernet connection; verify phone registration with CUCM.
Poor audio quality	Network/connections	Check network latency/jitter; verify handset cord is secure.
Cannot make calls	Configuration	Verify dial plan configuration; check for error messages on display.
Phone not registering	Network/DHCP	Check DHCP server; verify VLAN configuration; restart phone.

Reset: Unplug power, wait 10 seconds, reconnect. For factory reset, consult administrator.

Service: Contact network administrator or Cisco TAC: 1-800-553-2447; www.cisco.com