cisco phone manual 7941

The Cisco IP Phone 7941 is a full-featured VoIP telephone supporting SIP and SCCP protocols, designed for enterprise environments. It features a high-resolution monochrome display, multiple programmable line/feature buttons, built-in speakerphone, headset port, and Power over Ethernet (PoE) capability. 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 Devices 7. Using Phone Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Monochrome LCD display, Handset, Speakerphone, Programmable buttons, Navigation cluster, Headset port, Ethernet ports.

FeatureDescription
DisplayHigh-resolution monochrome LCD with backlight
Line/Feature ButtonsProgrammable for multiple lines or features (speed dial, call pickup)
SpeakerphoneFull-duplex for hands-free conversation
Headset Port2.5mm port for headset connectivity
Ethernet PortsTwo 10/100BASE-T ports (SW, PC) for network and PC pass-through
Power Source802.3af PoE or external power adapter
ProtocolsSIP (Session Initiation Protocol) and SCCP (Skinny Client Control Protocol)
Hold ButtonPlaces active call on hold
Volume ControlAdjusts handset, speakerphone, and ringer volume
Messages ButtonAccesses voicemail

Installation

Unpack and inspect contents. Ensure network infrastructure supports VoIP.

  1. Connect to Network: Use Ethernet cable to connect SW port to switch or PoE injector.
  2. Connect PC (Optional): Use second Ethernet cable from PC port to computer.
  3. Power the Phone: Use PoE from switch or connect external power adapter.
  4. Attach Handset: Connect coiled handset cord to handset port.

WARNING! Use only approved power sources. Ensure cables are securely connected to avoid disconnection.

First-Time Setup

Phone boots and registers with call control server (CUCM or other).

  1. Network Registration: Phone obtains IP via DHCP; contacts configured TFTP server for configuration.
  2. Verify Registration: Check for extension number on display and steady green light on line button.
  3. Set User Preferences: Use Settings menu to adjust ring tone, display contrast, etc.
  4. Program Speed Dials: Assign numbers to programmable buttons via phone menu or web interface.

CAUTION! Do not unplug during boot process. Contact administrator for server details.

Specifications

Controls and Settings

Access menus via NAVIGATION button cluster. Softkeys: Context-sensitive functions shown on display.

Key Buttons: HOLD, TRANSFER, CONFERENCE, MESSAGES, NAVIGATION (up/down/left/right), SETTINGS, VOLUME.

Settings Menu: Adjust ring type, display contrast, network settings (view only), status (IP address, firmware). Phone Web Interface: Access via IP address for advanced configuration (admin required).

Connecting Devices

Network: SW port to switch. PC: PC port to computer. Headset: 2.5mm plug to headset port.

  1. Power off phone before connecting headset or external devices.
  2. Use Cat5e or better Ethernet cables for network connections.
  3. For headset use, may need to enable headset mode in settings.

Tip: Label cables for easy identification during troubleshooting.

Using Phone Features

Make/Receive Calls: Lift handset or press Speaker button; dial number.

  1. Hold: Press HOLD button; resume by pressing flashing line button.
  2. Transfer: During call, press TRANSFER, dial target, press TRANSFER again.
  3. Conference: During call, press CONFERENCE, dial second party, press CONFERENCE to join.
  4. Voicemail: Press MESSAGES button; follow prompts.
  5. Speed Dial: Press programmed button or dial assigned code.
  6. Call History: Use NAVIGATION to view missed, received, placed calls.
  7. Adjust Volume: Use VOLUME button during call (handset/speaker) or idle (ringer).

WARNING! Do not use excessive force on buttons. Use approved headsets only.

Accessibility Features

Visual Alert: Flashing line button for incoming calls. Ringer Volume: Adjustable via VOLUME button. Headset Mode: Enables hands-free operation. High-Contrast Display: Adjustable via settings.

Care & Cleaning

Disconnect power before cleaning. Use soft, dry cloth for display and housing. For stubborn marks, dampen cloth with water only.

CAUTION! Do not use abrasive cleaners, solvents, or sprays. Avoid moisture entering ports.

Regulatory Information

FCC Part 15: Class A digital device; complies with limits for business environments. CE marked. For support, visit Cisco website or contact authorized support. Cisco, IP Phone are trademarks of Cisco Systems, Inc.

Troubleshooting

SymptomPossible CauseCorrective Action
No display/powerPower/PoE issueCheck Ethernet cable; verify switch PoE enabled; try external power adapter.
No dial toneNetwork/registrationCheck cable connections; verify IP address (Settings > Network); contact admin.
One-way/no audioNetwork/deviceCheck network QoS; verify handset cord fully inserted; test with headset.
Cannot transfer/conferenceConfigurationVerify feature enabled on server; check softkey configuration.
Buttons not workingSoftware/ hardwareReset phone (unplug/replug); contact admin for firmware update.

Reset: Unplug power/Ethernet, wait 10 seconds, reconnect.

Service: Contact network administrator or Cisco support.

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