Cisco IP Phone 7911 Manual

The Cisco IP Phone 7911 is a single-line, entry-level IP phone designed for basic voice communication in an enterprise environment. It features a monochrome LCD display, integrated Ethernet switch, Power over Ethernet (PoE) support, and standard telephony functions. 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. Advanced Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Monochrome LCD display, Handset, Speaker, Keypad, Ethernet ports, Power adapter port.

Feature	Description
LCD Display	2-line monochrome display for call information and status
Handset	Standard handset with receiver and microphone
Speaker	Built-in speaker for hands-free listening
Keypad	12-button dial pad for number entry
Ethernet Ports	Two 10/100 Mbps ports for network and PC connection
Power over Ethernet (PoE)	Supported via IEEE 802.3af or external power adapter
Volume Control	Adjusts handset, speaker, and ringer volume
Mute Button	Mutes the microphone during a call
Message Waiting Indicator	LED indicates voicemail messages
Headset Port	Optional headset connection (2.5mm)

Installation

Unpack and inspect contents. Place on stable surface.

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

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

First-Time Setup

Power on phone; follow network registration process.

Network registration: Phone will attempt to obtain IP address via DHCP.
Configure settings: Use web interface or call manager for extension assignment.
Test call: Dial internal extension or external number to verify functionality.
Adjust preferences: Set ringer type, volume, and display contrast.

CAUTION! Ensure phone is registered to correct call manager for proper operation.

Specifications

Display: 2-line monochrome LCD.
Network: 10/100 Mbps Ethernet, IEEE 802.3af PoE.
Protocols: SIP, SCCP (Skinny).
Audio: G.711, G.729 audio codecs.
Power: 48V DC via PoE or external adapter.
Dimensions: 8.3 x 9.1 x 6.3 inches (approx).
Weight: 2.2 lbs (with handset).
Operating Temp: 32°F to 104°F (0°C to 40°C).

Controls and Settings

Access settings via phone buttons or web interface. Front Panel: Volume control, Mute button, Message waiting LED.

Key Functions: Dial pad, Speaker button, Hold button, Transfer button, Settings button.

Display: Shows caller ID, date/time, extension, call status. Audio: Adjust handset, speaker, ringer volume via volume control. Network: Configure via web interface (IP address, subnet, gateway). Preferences: Set ringer type, contrast, date/time format.

Connecting to Network

Ethernet: Use CAT5e or higher cable. PoE: Ensure switch supports IEEE 802.3af.

Turn off phone before connecting cables.
Connect network cable from switch to phone's network port.
Connect PC to phone's PC port if needed.
Power on phone; check for network link LED.

Tip: Use straight-through Ethernet cables for connections.

Making and Receiving Calls

Basic telephony functions.

Make call: Lift handset or press Speaker, dial number.
Answer call: Lift handset or press Speaker when ringing.
End call: Hang up handset or press Speaker button.
Hold: Press Hold button to place call on hold.
Transfer: Press Transfer, dial target number, complete transfer.
Redial: Press Redial or dial ** to call last number.
Mute: Press Mute to disable microphone during call.

WARNING! Do not use phone during electrical storms for safety.

Advanced Features

Call Forwarding: Configure via call manager or phone settings. Voicemail: Access by pressing Messages button or dialing voicemail number. Headset Use: Connect headset to 2.5mm port for hands-free operation.

Care & Cleaning

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

CAUTION! Do not spray liquids directly on phone; keep away from moisture.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © 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	PoE/power adapter	Check PoE switch or power adapter connection; ensure cable is secure.
No network connection	Cable/DHCP	Verify Ethernet cable; check DHCP server; restart phone.
No dial tone	Registration/configuration	Ensure phone is registered to call manager; check extension configuration.
Poor audio quality	Network/connections	Check network latency/jitter; verify handset cord connection.
Display blank	Power/contrast	Check power; adjust display contrast via settings.

Reset: Unplug power, wait 10 seconds, reconnect to restart.

Service: Contact Cisco TAC or network administrator.