1. Introducció i finalview
The Cisco IP Business Phone 6821 is designed to deliver high-fidelity voice communications, enhancing inter-office communication and contributing to reduced operating costs. This Voice over IP (VoIP) phone is an ideal solution for mid-sized to large enterprises looking to transition from traditional analog or digital phone systems to a modern IP Communications system.

Figure 1: Cisco IP Business Phone 6821
This image displays the Cisco IP Business Phone 6821, showcasing its grayscale display, keypad, and handset. The phone is black and designed for desktop use.

Figure 2: Cisco IP Phone MPP 6800 Series Overview
This image displays the Cisco logo and highlights the 6800 series as affordable, everyday desktop phones, emphasizing their accessibility and practicality for business environments.
2. Què hi ha a la caixa
Upon unboxing your Cisco IP Business Phone 6821, please ensure all the following components are present:
- Cisco IP Business Phone 6821 unit (Model: CP-6821-3PW-NA-K9=)
- Telèfon
- Cable de l'auricular
- Cable Ethernet
- North American Power Adapter
- Guia d'inici ràpid (si s'inclou)
3. Instruccions de configuració
Follow these steps to set up your Cisco IP Business Phone 6821:
- Connecteu el telèfon: Connecteu un extrem del cable en espiral del auricular a l'auricular i l'altre extrem al port d'auricular de la base del telèfon.
- Connecteu-vos a la xarxa:
- Utilitzant Power over Ethernet (PoE): If your network switch supports IEEE 802.3af PoE (Class 2), connect an Ethernet cable from your network switch directly to the "SW" (Switch) port on the back of the phone. The phone will receive power and network connectivity through this single cable.
- Ús de l'adaptador de corrent: If PoE is not available, connect the North American power adapter to the power port on the back of the phone, then plug the adapter into a standard electrical outlet. Connect an Ethernet cable from your network router or switch to the "SW" (Switch) port on the back of the phone.
- Connexió a l'ordinador (opcional): 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.
- Engegada inicial: The phone will power on automatically and begin its boot-up sequence. This may take a few minutes as it connects to your network and registers with your VoIP service.
- SIP Registration: The phone supports 2 SIP registrations. Your network administrator will configure the necessary SIP settings for your lines.
4. Instruccions de funcionament
This section provides basic instructions for operating your Cisco IP Business Phone 6821.
4.1 Funcions de trucada bàsiques
- Fer una trucada: Lift the handset or press the speakerphone button. Dial the desired number using the keypad. Press the "Dial" softkey or wait for the call to connect.
- Respondre una trucada: Lift the handset or press the flashing line button or speakerphone button.
- Finalització d'una trucada: Replace the handset or press the speakerphone button.
- Torna a marcar: Press the "Redial" softkey to call the last dialed number.
- Silenciar: Premeu el botó Silenciar botó per silenciar el micròfon durant una trucada. Premeu-lo de nou per activar el so.
- Control de volum: Utilitza el Volum botons (+ i -) to adjust the handset, headset, or speakerphone volume during a call, or the ringer volume when idle.
4.2 Funcions avançades
- Compatibilitat amb auriculars: Connect an audio headset through the RJ9 port for hands-free communication.
- Transferència de trucades: During an active call, press the "Transfer" softkey. Dial the number to which you want to transfer the call. Wait for the second party to answer (consulted transfer) or press "Transfer" again to complete the transfer (blind transfer).
- Conferències telefòniques: The phone supports 2-way conference calls. During an active call, press the "Conference" softkey. Dial the number of the third party. Once connected, press "Conference" again to join all parties.
- Correu de veu: Premeu el botó Missatges button (envelope icon) to access your voicemail. Follow the voice prompts.
- Navegació de la pantalla: The 2.5-inch grayscale display provides scrollable access to calling features and text-based XML applications. Use the navigation cluster (up, down, left, right, select) to move through menus and options.

Figure 3: Business-Grade Audio and Connectivity
An image showing a professional using the phone, emphasizing reliable business-grade audio, Gigabit Ethernet integration for fast data transfer, and low power consumption.

Icona de comunicació
This icon symbolizes effective communication features of the phone, highlighting its role in facilitating clear and direct conversations.

Call Transfer Icon
This icon indicates the phone's capability for call forwarding or transfer, allowing users to redirect calls efficiently.

Voice Quality Icon
This icon signifies the high-fidelity voice capabilities of the device, ensuring clear and crisp audio during calls.
5. Manteniment
To ensure the longevity and optimal performance of your Cisco IP Business Phone 6821, follow these simple maintenance guidelines:
- Neteja: Use a soft, dry, lint-free cloth to wipe down the phone's exterior. For stubborn smudges, slightly dampen the cloth with water. Avoid using harsh chemicals, abrasive cleaners, or aerosol sprays, as these can damage the phone's finish and internal components.
- Cura de la pantalla: The grayscale display is sensitive. Clean it gently with a soft, dry cloth. Do not press hard on the screen.
- Medi ambient: Keep the phone in a cool, dry place, away from direct sunlight, excessive heat, and moisture. Avoid placing it near sources of strong electromagnetic fields.
- Gestió de cordons: Ensure all cords (handset, Ethernet, power) are not kinked or pinched, which can lead to damage over time.
6. Solució De Problemes
This section provides solutions to common issues you might encounter with your Cisco IP Business Phone 6821.
6.1 Problemes comuns i solucions
| Problema | Causa possible | Solució |
|---|---|---|
| El telèfon no s'encén. | No power supply or faulty connection. | Ensure the power adapter is securely plugged into the phone and a working electrical outlet. If using PoE, verify the Ethernet cable is connected to a PoE-enabled port on your network switch. |
| No dial tone or cannot make/receive calls. | Problema de connectivitat de xarxa, error de registre SIP o configuració incorrecta. |
|
| Phone requires an activation code and cannot be set up with my VoIP service (e.g., Ringcentral). | The phone may be provisioned for a specific service provider or require a specific activation method. | This phone model might be pre-configured or require specific provisioning from your VoIP service provider. If your service (e.g., Ringcentral) requires an IP address for setup but the phone asks for an activation code, you will need to:
|
| Poor audio quality in handset. | Handset connection, network quality, or phone settings. |
|
7. Especificacions
Key technical specifications for the Cisco IP Business Phone 6821:
| Característica | Detall |
|---|---|
| Número de model | CP-6821-3PW-NA-K9= |
| Mostra | 2.5-inch Grayscale Display |
| Registres SIP | 2 |
| Opcions d'energia | IEEE 802.3af PoE (Class 2), North American Power Adapter included |
| Port d'auriculars | RJ9 |
| Color | Negre |
| Material | Plàstic |
| Pes de l'article | 2.33 lliures |
| Dimensions del producte (L x A x A) | 12 x 9 x 3 polzades |
| Capacitat de trucades de conferència | 2 vies |
8. Garantia i Suport
Garantia: The Cisco IP Business Phone 6821 comes with a 1-year limited hardware warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
Suport: For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact your Cisco authorized reseller or IT support department. You may also visit the official Cisco support website for additional resources and documentation.
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