Cisco Phone Manual 7942

The Cisco IP Phone 7942 is a feature-rich VoIP telephone designed for business environments, supporting SIP and SCCP protocols. It features a high-resolution pixel-based display, multiple line appearances, integrated Ethernet switch, headset and handset ports, speakerphone, and programmable soft keys. 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 Devices 7. Using Phone Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-resolution display, Handset, Speakerphone, Programmable line/feature keys, Navigation button, Settings button, Volume rocker, Headset port, Ethernet ports.

Feature	Description
Display	High-resolution pixel-based LCD with backlight
Line Keys	Two programmable line/feature keys
Handset	Standard handset with light strip indicator
Speakerphone	Full-duplex speakerphone for hands-free calls
Headset Port	2.5mm headset port for headset connectivity
Ethernet Ports	10/100 Mbps switch (PC and Network ports)
Navigation Button	4-way navigation with Select key in center
Settings Button	Accesses phone settings and configuration
Volume Rocker	Adjusts handset, headset, speaker, and ringer volume
Power	Powered via Power over Ethernet (PoE) or external power adapter

Installation

Unpack and inspect contents. Place on stable surface.

Connect to Network: Plug Ethernet cable from network switch into NETWORK port on phone.
Connect PC: Plug Ethernet cable from PC into PC port on phone (optional).
Connect Handset: Plug coiled handset cord into HANDSET port.
Power the Phone: Use PoE from switch or connect external power adapter to power port.

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

First-Time Setup

Phone will boot and attempt to register with call server.

Check Registration: Observe display for extension number and status (Registered).
Set Preferences: Press SETTINGS button to adjust ring type, contrast, etc.
Program Speed Dials: Use phone menu to assign numbers to speed dial keys.
Test Call: Lift handset and dial another extension to verify audio.

CAUTION! Do not disconnect cables while phone is powered on.

Specifications

Display: High-resolution pixel-based LCD.
Protocols: SIP and SCCP.
Audio: Wideband audio support (G.711, G.729).
Ports: Two 10/100 Mbps Ethernet ports, headset (2.5mm), handset.
Power: IEEE 802.3af PoE or external 48V DC power adapter.
Supported Features: Hold, transfer, conference, forward, speed dial, mute, speakerphone.
Operating Temp: 32°F to 104°F (0°C to 40°C).
Dimensions: 8.25 x 10.5 x 6.5 inches (approx).

Controls and Settings

Access settings via SETTINGS button. Front Panel: Line keys, Navigation button, Speakerphone, Mute, Headset, Volume rocker.

Soft Keys: Display context-sensitive options (Hold, Transfer, Conference, etc.).

Phone Settings: Ring type, contrast, network configuration, call forward, speed dials. Audio Settings: Volume levels for ringer, handset, speaker, headset. Network Settings: IP configuration (DHCP/static), VLAN, server addresses.

Connecting Devices

Network: Ethernet cable to NETWORK port. PC: Ethernet cable to PC port. Headset: 2.5mm plug to headset port.

Turn off phone before connecting devices if possible.
Match cables to correct ports.
For headset use, enable headset mode via Settings or dedicated button.

Tip: Use quality CAT5e or higher cables for reliable network connection.

Using Phone Features

Supports basic and advanced telephony features.

Make Call: Lift handset or press Speakerphone, dial number.
Answer Call: Lift handset, press Speakerphone, or press Answer soft key.
Hold: Press Hold soft key to place call on hold.
Transfer: During call, press Transfer, dial target, press Transfer again.
Conference: During call, press Conference, dial participant, press Conference again.
Forward Calls: Use Call Forward feature in Settings menu.
Mute: Press Mute button to mute microphone.
Volume Adjustment: Use Volume rocker during call or while idle.

WARNING! Do not expose phone to liquids. Keep vents clear for cooling.

Accessibility Features

Visual Alerts: Flashing handset light for incoming calls. Audio Adjustments: Independent volume controls for ringer, handset, speaker, headset. High-Contrast Display: Adjustable contrast in Settings.

Care & Cleaning

Unplug power before cleaning. Use slightly damp, lint-free cloth; do not use liquids or aerosols.

CAUTION! Do not spray cleaners directly on phone. Avoid abrasive materials.

Regulatory Information

Troubleshooting

Symptom	Possible Cause	Corrective Action
Phone not powering on	Power source	Check PoE switch or power adapter connection; verify cable.
No dial tone	Network/registration	Check Ethernet cable; verify phone is registered to call server.
Cannot hear caller	Volume/mute	Adjust volume; check if Mute is activated.
Display is blank	Power/contrast	Check power; adjust contrast in Settings.
Call features not working	Configuration	Verify feature configuration on call server; reboot phone.

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

Service: Contact Cisco Technical Assistance Center or authorized service provider.