1. Introduction
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. Consignes de sécurité
Respectez les consignes de sécurité suivantes afin d'éviter d'endommager l'appareil ou de vous blesser :
- N’exposez pas le téléphone à l’eau ou à l’humidité.
- Évitez de placer le téléphone près de sources de chaleur ou en plein soleil.
- Use only the power supply specified for this device (if not using Power over Ethernet).
- Tenez le téléphone éloigné des champs électromagnétiques puissants.
- N’essayez pas d’ouvrir ou de réparer l’appareil vous-même. Confiez toute réparation à un personnel qualifié.
3. Contenu du colis
Vérifiez que votre colis contient les éléments suivants :
- Snom 300 IP Phone unit
- Combiné
- Cordon enroulé du combiné
- Câble Ethernet
- Support de bureau
- Guide d'installation rapide (si inclus)

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

Image 4.1: Devant view of the Snom 300 IP Phone, showing the display, navigation keys, dial pad, and programmable function keys.
4.1 Panneau avant
- Afficher: 2 x 16 character backlit LCD for call information and menu navigation.
- Touches de navigation : Up, Down, Left, Right, and OK buttons for menu interaction.
- Pavé numérique: Standard 12-key numeric keypad.
- Programmable Function Keys: 6 keys with LEDs for speed dials, line appearances, or feature access.
- Contrôle du volume : Buttons to adjust handset, headset, and speakerphone volume.
- Bouton haut-parleur : Active/désactive le haut-parleur.
- Bouton du casque : Toggles between headset and handset/speakerphone.
- Message Waiting Indicator (MWI) LED: Flashes to indicate new voicemail messages.
4.2 Panneau arrière et ports

Image 4.2: Arrière view of the Snom 300 IP Phone, highlighting the Ethernet ports, handset port, and optional power input.
- Port 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.
- Port combiné (RJ9) : Permet de connecter le cordon enroulé du combiné.
- Port casque (RJ9) : Connects an optional headset.
- Alimentation (CC 5 V) : For connecting an optional external power adapter if PoE is not used.
5. Installation
Follow these steps to set up your Snom 300 IP Phone.
5.1 Assemblage du téléphone
- 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.

Image 5.1: Côté view of the Snom 300 IP Phone, demonstrating the attached desk stand for optimal viewangle de vue.
5.2 Connexion au réseau et alimentation électrique
The Snom 300 supports Power over Ethernet (PoE) or an external power adapter.
- Pour 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.
- Sans 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 Démarrage initial
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. Fonctionnement de base
6.1 Passer un appel
- Soulevez le combiné ou appuyez sur le Haut-parleur button, or press a line key.
- Dial the desired phone number using the dial pad.
- Appuyez sur le OK button or wait a few seconds for the call to initiate automatically.
6.2 Répondre à un appel
Lorsque le téléphone sonne :
- Décrochez le combiné.
- Appuyez sur le Haut-parleur bouton.
- Appuyez sur la touche de ligne clignotante.
6.3 Terminer un appel
- If using the handset, place it back in the cradle.
- Si vous utilisez un haut-parleur ou un casque, appuyez sur la touche Haut-parleur or Casque d'écoute à nouveau sur le bouton ou appuyez sur le Fin d'appel soft key (if available on display).
6.4 Réglage du volume
Pendant un appel, utilisez le 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. Fonctionnalités avancées
7.1 Call Hold
Pendant un appel actif, appuyez sur la Prise 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 Transfert d'appel
The Snom 300 supports both blind and attended transfers.
- Transfert aveugle : Pendant un appel actif, appuyez sur la Transfert soft key, dial the transfer destination number, and press Transfert encore.
- Transfert assisté : Pendant un appel actif, appuyez sur la Transfert soft key, dial the transfer destination number, wait for the party to answer, announce the call, and then press Transfert encore une fois pour terminer.
7.3 Conférence à trois
Pour lancer une conférence téléphonique à trois :
- Établissez un appel avec la première partie.
- Appuyez sur le Conférence soft key (or a designated programmable key). The first party is put on hold.
- Composez le numéro de la deuxième personne et attendez qu'elle réponde.
- Appuyez sur le Conférence soft key again to join all three parties.
7.4 Ne pas déranger (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. Entretien
8.1 Nettoyage du téléphone
To clean your Snom 300 IP Phone:
- Débranchez le téléphone avant de le nettoyer.
- Utilisez un chiffon doux et sec.amp chiffon pour essuyer les surfaces.
- N’utilisez pas de nettoyants abrasifs ni de solvants, car ils peuvent endommager la finition.
- Veillez à ce qu'aucune humidité ne pénètre dans les ports ou les ouvertures.
8.2 mises à jour du micrologiciel
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. Dépannage
If you encounter issues with your Snom 300 IP Phone, refer to the following common problems and solutions:
| Problème | Cause possible | Solution |
|---|---|---|
| Le téléphone ne s'allume pas | 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. |
| Pas de tonalité | 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. |
| Impossible de passer/recevoir des appels | 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. |
| L'écran est vide ou figé. | Problème logiciel temporaire ; problème d’alimentation. | Perform a power cycle: Disconnect power for 10 seconds, then reconnect. If the issue persists, contact support. |
9.1 Réinitialisation d'usine
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. Spécifications
Key technical specifications for the Snom 300 IP Phone (Model REF-666949):
- SIP Identities: 4
- Ports Ethernet : 2 x IEEE 802.3 10/100 Mbps (LAN, PC)
- Pouvoir: Power over Ethernet (PoE) or optional 5V DC power adapter
- Afficher: 2 x 16 character, backlit LCD
- Touches: 27 keys, including 6 programmable function keys with LEDs
- Codecs audio : G.711, G.729A, G.723.1, G.722, G.726, GSM 6.10 (full rate)
- Sécurité: SIPS/SRTP, TLS
- Caractéristiques: 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.
- Dimensions: Environ 7.87 x 4.72 x 7.28 pouces (L x L x H)
- Poids: Environ 1.61 livres
11. Garantie et assistance
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.





