1. Introdución
This manual provides detailed instructions for the setup, operation, and maintenance of your Snom 300 IP Phone. The Snom 300 is a SIP-based business telephone designed for efficient communication in professional environments. It features a backlit display, programmable function keys, and support for various VoIP functionalities.
Please read this manual thoroughly before using your device to ensure proper functionality and to maximize its capabilities.
2. Información de seguridade
Observe the following safety guidelines to prevent damage to the device or injury to yourself:
- Non expoñas o teléfono á auga nin á humidade.
- Evite colocar o teléfono preto de fontes de calor ou baixo a luz solar directa.
- Use only the power supply specified for this device (if not using Power over Ethernet).
- Manteña o teléfono lonxe de campos electromagnéticos fortes.
- Non intente abrir nin reparar o dispositivo vostede mesmo. Encargue calquera mantemento a persoal cualificado.
3. Contido do paquete
Verifique que o seu paquete conteña os seguintes elementos:
- Snom 300 IP Phone unit
- Auricular
- Cable enrolado do auricular
- Cable Ethernet
- Soporte de mesa
- Guía de instalación rápida (se está incluída)

Imaxe 3.1: Contents of the Snom 300 IP Phone package, including the main phone unit, handset, coiled cord, Ethernet cable, and desk stand.
4. Sobrecarga físicaview
Familiarize yourself with the components of your Snom 300 IP Phone.

Imaxe 4.1: Fronte view of the Snom 300 IP Phone, showing the display, navigation keys, dial pad, and programmable function keys.
4.1 Panel frontal
- Visualización: 2 x 16 character backlit LCD for call information and menu navigation.
- Teclas de navegación: Up, Down, Left, Right, and OK buttons for menu interaction.
- Teclado de marcación: Standard 12-key numeric keypad.
- Teclas de función programables: 6 keys with LEDs for speed dials, line appearances, or feature access.
- Control de volume: Buttons to adjust handset, headset, and speakerphone volume.
- Botón do altofalante: Activates/deactivates the speakerphone.
- Botón dos auriculares: Toggles between headset and handset/speakerphone.
- Message Waiting Indicator (MWI) LED: Flashes to indicate new voicemail messages.
4.2 Panel traseiro e portos

Imaxe 4.2: Traseira view of the Snom 300 IP Phone, highlighting the Ethernet ports, handset port, and optional power input.
- Porto LAN (RJ45): Connects to your network switch or router. Supports Power over Ethernet (PoE).
- PC Port (RJ45): Connects to your computer, allowing it to share the network connection through the phone's built-in switch.
- Porto do teléfono (RJ9): Connects the coiled cord from the handset.
- Porto de auriculares (RJ9): Connects an optional headset.
- Entrada de alimentación (CC 5 V): For connecting an optional external power adapter if PoE is not used.
5. Configuración
Follow these steps to set up your Snom 300 IP Phone.
5.1 Montaxe do teléfono
- Attach the desk stand to the back of the phone unit. Ensure it clicks securely into place.
- Connect one end of the coiled cord to the handset and the other end to the Handset Port (RJ9) on the rear of the phone.

Imaxe 5.1: Lado view of the Snom 300 IP Phone, demonstrating the attached desk stand for optimal viewángulo de ing.
5.2 Conexión á rede e á alimentación
The Snom 300 supports Power over Ethernet (PoE) or an external power adapter.
- For PoE: Connect one end of the Ethernet cable to the LAN Port (RJ45) on the phone and the other end to a PoE-enabled network switch or router. The phone will power on automatically.
- Without PoE: Connect one end of the Ethernet cable to the LAN Port (RJ45) on the phone and the other end to your network switch or router. Then, connect a compatible 5V DC power adapter (sold separately) to the Power Input port on the phone and plug it into a power outlet.
- (Optional) PC Connection: If you wish to connect your computer through the phone, connect an Ethernet cable from your computer to the PC Port (RJ45) on the phone.
- (Optional) Headset Connection: If using a headset, connect it to the Headset Port (RJ9) on the rear of the phone.
5.3 Arranque inicial
Once connected to power and network, the phone will begin its boot-up sequence. The display will show boot progress and then typically display network information or a 'No Service' message until configured. Network configuration (IP address, SIP account details) is usually handled by your network administrator or VoIP service provider.
6. Funcionamento básico
6.1 Facer unha chamada
- Levante o auricular ou prema a tecla Altavoz button, or press a line key.
- Dial the desired phone number using the dial pad.
- Preme o OK button or wait a few seconds for the call to initiate automatically.
6.2 Responder a unha chamada
Cando soa o teléfono:
- Levante o teléfono.
- Preme o Altavoz botón.
- Prema a tecla de liña intermitente.
6.3 Finalización dunha chamada
- If using the handset, place it back in the cradle.
- Se usa o altofalante ou os auriculares, prema o botón Altavoz or Auriculares de novo ou prema o botón Finalizar chamada soft key (if available on display).
6.4 Axuste do volume
Durante unha chamada, use o Volume buttons (up/down arrows) to adjust the volume of the handset, headset, or speakerphone.
6.5 Using Programmable Function Keys
The 6 programmable function keys can be configured for various features such as speed dial, busy lamp field (BLF), or direct access to specific functions. Their exact functionality depends on your system's configuration.
7. Funcións avanzadas
7.1 Call Hold
Durante unha chamada activa, prema o botón Manteña soft key (if available on display) or a designated programmable key. To retrieve the call, press the same key again or the flashing line key.
7.2 Transferencia de chamadas
The Snom 300 supports both blind and attended transfers.
- Transferencia a cegas: Durante unha chamada activa, prema o botón Transferencia soft key, dial the transfer destination number, and press Transferencia de novo.
- Traslado asistido: Durante unha chamada activa, prema o botón Transferencia soft key, dial the transfer destination number, wait for the party to answer, announce the call, and then press Transferencia de novo para completar.
7.3 3-Way Conferencing
To initiate a 3-way conference call:
- Establish a call with the first party.
- Preme o Conferencia soft key (or a designated programmable key). The first party is put on hold.
- Dial the second party's number and wait for them to answer.
- Preme o Conferencia soft key again to join all three parties.
7.4 Do Not Disturb (DND)
The DND feature allows you to send all incoming calls directly to voicemail or a busy signal. Access this feature through the phone's menu or a designated programmable key. When active, a DND icon typically appears on the display.
7.5 Address Book and Call Lists
The phone maintains an internal address book (up to 100 entries) and lists of missed, received, and dialed calls (up to 100 entries each). Navigate to these features using the menu and navigation keys.
8. Mantemento
8.1 Limpeza do teléfono
To clean your Snom 300 IP Phone:
- Desconecte o teléfono da corrente antes de limpalo.
- Use un suave, damp pano para limpar as superficies.
- Non empregues produtos de limpeza abrasivos nin solventes, xa que poden danar o acabado.
- Asegúrate de que non entre humidade nos portos ou aberturas.
8.2 Actualizacións de firmware
Firmware updates are typically managed by your network administrator or VoIP service provider. Do not attempt to update the firmware yourself unless instructed to do so by qualified personnel, as incorrect procedures can render the device inoperable.
9 Solución de problemas
If you encounter issues with your Snom 300 IP Phone, refer to the following common problems and solutions:
| Problema | Causa posible | Solución |
|---|---|---|
| O teléfono non se acende | No power connection; Faulty Ethernet cable/PoE switch; Faulty power adapter. | Check Ethernet cable connection to LAN port. Ensure PoE is active or external power adapter is correctly connected and functional. |
| Sen ton de marcación | Network issue; SIP account not registered; Handset/headset not connected properly. | Verify network connectivity. Check SIP registration status on the display. Ensure handset/headset is securely plugged in. Contact your administrator if SIP registration fails. |
| Non se poden facer/recibir chamadas | SIP account not registered; Network firewall blocking VoIP traffic; Incorrect dial plan. | Confirm SIP account registration. Check network settings and firewall rules with your IT department. Verify dial plan configuration. |
| A pantalla está en branco ou conxelada | Temporary software glitch; Power issue. | Perform a power cycle: Disconnect power for 10 seconds, then reconnect. If the issue persists, contact support. |
9.1 Restablecemento de fábrica
A factory reset will erase all custom configurations and restore the phone to its default settings. This should only be performed as a last resort and typically under the guidance of your network administrator, as it requires re-provisioning the phone. Consult your administrator for the specific procedure for your Snom 300 model.
10. Especificacións
Key technical specifications for the Snom 300 IP Phone (Model REF-666949):
- SIP Identities: 4
- Portos Ethernet: 2 x IEEE 802.3 10/100 Mbps (LAN, PC)
- Potencia: Power over Ethernet (PoE) or optional 5V DC power adapter
- Visualización: 2 x 16 character, backlit LCD
- Teclas: 27 keys, including 6 programmable function keys with LEDs
- Códecs de audio: G.711, G.729A, G.723.1, G.722, G.726, GSM 6.10 (full rate)
- Seguridade: SIPS/SRTP, TLS
- Características: Headset connection, Speakerphone (full duplex), Caller-ID, Message Waiting Indication, Address book (100 entries), Speed dialing, Call lists (100 entries each), Call waiting, 3-way conferencing, Do Not Disturb (DND), XML mini-Browser.
- Dimensións: Aproximadamente 7.87 x 4.72 x 7.28 polgadas (L x W x H)
- Peso: Aproximadamente 1.61 libras
11. Garantía e soporte
This Snom 300 IP Phone is a Certified Refurbished product. It has been tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories and a minimum 90-day warranty.
For technical support or warranty claims, please refer to the specific support channels provided by your reseller or VoIP service provider. Do not attempt to open or modify the device, as this may void your warranty.