1. Introduction
This user manual provides comprehensive instructions for the setup, operation, maintenance, and troubleshooting of the Cisco IP Phone 8811. Designed for business-class collaboration, this VoIP phone delivers high-fidelity, reliable, secure, and scalable voice communications. Please read this manual thoroughly to ensure proper use and to maximize the functionality of your device.
2. Produit terminéview
The Cisco IP Phone 8811 is a cost-effective, business-class collaboration endpoint. It features an attractive ergonomic design and wideband audio for clear voice communications. The device supports SIP, RTCP, RTP, SRTP, and SDP protocols, offering encrypted voice communications for enhanced security. It integrates with Cisco communication servers to provide a comprehensive suite of unified communications features.

Image of the Cisco IP Phone 8811, a charcoal-colored VoIP phone with a display screen, keypad, and various function buttons. The phone features a handset on the left, a large display on the right, and a central navigation cluster.
3. Installation
3.1 Contenu du paquet
Avant de commencer, assurez-vous que tous les composants sont présents :
- Cisco IP Phone 8811 unit
- Combiné et cordon spiralé
- Câble Ethernet (pour la connexion réseau)
- Optional: Power adapter (if Power over Ethernet (PoE) is not used)
- Documentation (ce manuel)
3.2 Connexion du téléphone
- Connectez le combiné : Branchez une extrémité du cordon spiralé au combiné et l'autre extrémité au port du combiné sur la base du téléphone.
- Connexion au réseau (PoE) : If using Power over Ethernet, connect an Ethernet cable from your network switch or router to the "SW" (Switch) port on the back of the phone. The phone will power on automatically.
- Connect to Network (External Power): If PoE is not available, connect an Ethernet cable from your network switch or router to the "SW" port. Then, connect the optional power adapter to the phone's power port and plug it into a power outlet.
- Connexion au PC (facultatif) : If you wish to connect a computer through the phone, connect an Ethernet cable from your computer to the "PC" port on the back of the phone.
- Démarrage initial : Allow the phone to power on and connect to the network. This process may take a few minutes as the phone obtains an IP address and registers with your call control system.
3.3 options de montage
The Cisco IP Phone 8811 is designed for desktop use with its integrated stand. It is also wall-mountable using an optional wall-mount kit (sold separately).
4. Mode d'emploi
4.1 Fonctions d'appel de base
- Passer un appel : Lift the handset, press the Speaker button, or press a line button. Dial the number and press the Dial softkey or wait for automatic dialing.
- Répondre à un appel: Lift the handset, press the Speaker button, or press the Answer softkey.
- Terminer un appel : Replace the handset, press the Speaker button again, or press the End Call softkey.
- Placing a Call on Hold: During an active call, press the Hold softkey. To resume, press the Resume softkey or the flashing line button.
- Transférer un appel : During an active call, press the Transfer softkey. Dial the transfer recipient's number, and once connected, press Transfer again to complete.
4.2 Speakerphone and Headset
Appuyez sur le Conférencier button to activate or deactivate the speakerphone. The phone also supports a headset connection via the dedicated headset port.
4.3 Conférences téléphoniques
The Cisco IP Phone 8811 supports 3-way conference calls. During an active call, press the Conférence softkey, dial the number of the third party, and once connected, press Conférence à nouveau pour réunir toutes les parties.
4.4 Messagerie vocale
Appuyez sur le Messages button to access your voicemail system. Follow the voice prompts to retrieve messages.
4.5 Réglage du volume
Utilisez le Volume button (rocker switch) to adjust the volume of the handset, speakerphone, or ringer.
5. Entretien
5.1 Nettoyage du téléphone
To clean the phone, use a soft, lint-free cloth. If necessary, slightly dampen the cloth with water. Avoid using abrasive cleaners, solvents, or aerosol sprays, as these can damage the phone's surface and internal components.
5.2 Considérations environnementales
Keep the phone away from direct sunlight, heat sources, and excessive moisture. Ensure proper ventilation around the device to prevent overheating.
6. Dépannage
6.1 Problèmes courants et solutions
| Problème | Cause possible | Solution |
|---|---|---|
| Le téléphone ne s'allume pas. | Aucune alimentation électrique provenant d'Ethernet (PoE) ou d'un adaptateur secteur. | Verify Ethernet cable is securely connected to a PoE-enabled port, or ensure power adapter is correctly plugged in. |
| Pas de tonalité. | Phone not registered with call control system; network issue. | Check network cable connection. Allow time for registration. If issue persists, contact your IT administrator. |
| Je n'entends pas l'appelant / L'appelant ne m'entend pas. | Volume too low; faulty handset/headset; network quality issue. | Adjust volume. Test with speakerphone. Check handset/headset connection. |
| L'écran est vide ou figé. | Software issue; power interruption. | Débranchez le câble Ethernet (et l'adaptateur secteur, le cas échéant) pendant 10 secondes, puis rebranchez-le pour redémarrer le téléphone. |
For issues not listed here or if solutions do not resolve the problem, please contact your system administrator or technical support.
7. Spécifications
| Marque | Fabricant d'équipement d'origine |
| Numéro de modèle | CP-8811-K9= |
| Couleur | Charbon de bois |
| Poids de l'article | 1 livre (environ 0.45 kg) |
| Dimensions du colis | 13.31 x 10.67 x 2.91 pouces (environ 33.8 x 27.1 x 7.4 cm) |
| Type de téléphone | Téléphone VoIP filaire |
| Source d'énergie | Alimentation filaire (PoE ou adaptateur secteur en option) |
| Type de composeur | Integrated VoIP Dialer |
| Type de répondeur | Numérique |
| Appareils compatibles | Devices supporting SIP, PoE, and Gigabit Ethernet |
| Capacité d'enregistrement | 18 minutes (for voicemail, if supported by system) |
| Capacité de conférence téléphonique | 3 voies |
8. Garantie et assistance
Warranty information for the Cisco IP Phone 8811 (Model CP-8811-K9=) is typically provided by the original manufacturer, OEM, or the reseller from whom the product was purchased. Please refer to the documentation included with your purchase or contact your vendor for specific warranty terms and conditions.
For technical support, troubleshooting assistance beyond this manual, or service inquiries, please contact your IT department or the authorized reseller/manufacturer support channels.





