Cisco IP Phone 303 Manual

The Cisco IP Phone 303 is a single-line business IP phone designed for basic voice communication needs. It features a high-quality handset and speakerphone, support for Power over Ethernet (PoE), a dedicated Ethernet switch port for connecting a PC, and a simple, intuitive interface. Below are key sections covering features, installation, configuration, operation, and troubleshooting.

1. Features at a Glance 2. Installation and Setup 3. Physical Description 4. Specifications 5. Basic Operation 6. Advanced Features 7. Configuration via Web Interface 8. Care & Maintenance 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Handset, Speakerphone, LCD display, Navigation button, Ethernet ports, Power port.

Feature	Description
Single Line	Supports one VoIP line/extension
Power over Ethernet (PoE)	Receives power via Ethernet cable (IEEE 802.3af)
Integrated Ethernet Switch	Two 10/100 Mbps ports for network and PC connection
Speakerphone and Handset	Full-duplex speakerphone and traditional handset
LCD Display	2-line monochrome display for call information
Hold Button	Places active call on hold
Volume Control	Adjusts handset, speakerphone, and ringer volume
Messages Button	Accesses voice mail messages
Headset Port	3.5mm port for optional headset connection
Security	Support for secure voice (SRTP, TLS) with proper configuration

Installation and Setup

Unpack and inspect contents. Ensure you have a working network with PoE or an external power adapter.

Connect to Network: Plug an Ethernet cable from your network switch/router into the SW port on the phone.
Connect a PC (Optional): Plug an Ethernet cable from the PC port on the phone to your computer.
Apply Power: If using PoE, the phone will power on automatically. If not, connect the external power adapter to the DC 48V port.
Connect Handset: Plug the handset cord into the dedicated jack.
Power On: The phone will boot, obtain an IP address via DHCP, and register with the call control system (e.g., Cisco Unified Communications Manager Express).

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

Physical Description

Access OSD via TV MENU or SETUP (DVD). Front Panel: POWER, OPEN/CLOSE, AUTO/DPMS, MUTE.

Front View:

LCD Display: Shows time, extension number, caller ID, and menu items.
Navigation Button: Scrolls through menus and selects items.
Hold Button: Red button to place a call on hold.
Messages Button: Accesses voice mail.
Volume Control Button: Adjusts volume for ringer, handset, and speaker.

Side/Rear View:

Handset Port: RJ-9 connector for the handset.
Headset Port: 3.5mm audio jack.
Ethernet Ports: SW (to network), PC (to computer).
DC 48V Port: For external power adapter if PoE is not used.

Specifications

Phone Type: Single-line SIP IP Phone.
Network Interfaces: Two 10/100 Mbps Ethernet ports (Auto-MDIX).
Power: IEEE 802.3af PoE or external 48V DC power adapter.
Protocols: SIP (Session Initiation Protocol).
Audio Codecs: G.711a/u, G.729a/b, G.722 (wideband).
Display: 2-line monochrome LCD with backlight.
Dimensions (H x W x D): Approx. 7.5 x 8.5 x 6.5 inches.
Operating Temp: 32°F to 104°F (0°C to 40°C).
Compliance: FCC Part 15 Class B, CE, UL.

Basic Operation

Making and Receiving Calls:

Make a Call: Lift handset or press Speaker button. Dial number using the keypad.
Answer a Call: Lift handset, press Speaker button, or press the flashing line button.
End a Call: Hang up handset or press Speaker button again.
Place Call on Hold: Press the Hold button. Press Hold again or resume by lifting handset/pressing Speaker.
Adjust Volume: Press the Volume button during a call to adjust handset/speaker volume. Press it while phone is idle to adjust ringer volume.
Access Voice Mail: Press the Messages button and follow prompts.

Tip: The LCD will show the current date/time, extension, and call status.

Advanced Features

Configured via the phone's web interface or call control system.

Call Forwarding: Forward all calls to another number. Configure via ** (codes vary by system).
Do Not Disturb (DND): Silence the ringer. Activate via phone settings menu.
Speed Dials: Program frequently called numbers for quick dialing.
Network Settings: Static IP, VLAN (802.1Q), QoS configuration.
Security: Enable encryption for signaling (TLS) and media (SRTP).

Note: Some features require configuration on your VoIP server (e.g., Cisco UCM Express).

Configuration via Web Interface

Access the phone's internal web server for advanced settings.

Find the phone's IP address (press the Settings button on phone or check DHCP server).
Open a web browser and enter http://[phone-ip-address].
Log in with credentials (default often admin/admin).
Configure:
- Network: IP, subnet, gateway, DNS.
- SIP Settings: Registrar, proxy, authentication.
- Audio: Codec preference, volume settings.
- Time Settings: NTP server.
Click Submit or Save to apply changes. The phone may reboot.

WARNING! Incorrect configuration may cause loss of service. Consult your network administrator.

Care & Maintenance

Unplug power/Ethernet before cleaning. Use a soft, dry cloth. Do not use liquids or aerosols.

CAUTION! Do not spray cleaners directly on the phone. Keep away from excessive heat and moisture.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. This device complies with Part 68 of the FCC rules. The REN (Ringer Equivalence Number) is 0.1B. Copyright © Cisco Systems, Inc. All rights reserved. Cisco and the Cisco logo are trademarks of Cisco Systems, Inc. For support, visit www.cisco.com/support or contact your network administrator.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Phone does not power on	No power	Check PoE switch or power adapter connection. Ensure Ethernet cable is functional.
No dial tone	Network/Registration	Check network connectivity. Verify phone is registered to the SIP server (check IP and SIP settings).
One-way or no audio	Network/Firewall	Check QoS settings, ensure firewalls allow RTP traffic (UDP ports).
Can't access web interface	IP/Network	Verify phone's IP address. Ensure your PC is on the same subnet.
Poor audio quality	Network congestion	Enable QoS on network. Try a different audio codec (e.g., G.711).
LCD is blank	Backlight/Power	Check power. Adjust display contrast via settings menu (press Settings button).

Reset: To factory reset, press and hold the # key while powering on the phone, or use the web interface.

Service: For technical support, visit www.cisco.com/support or contact your system administrator.