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Welcome!
This manual helps you to optimise the usage of the IP telephone in combination with the PBX. Please use this manual at initial operation. Some features differ from the features described in the manufacturer's documentation.
The following pages describe the snom 821 system telephone.
We hope you enjoy using the telephones!
Subject to alterations
Version 2 / 09.2023 (en)
Type | Icon/Character | Description |
NOTE
CAUTION
WARNING | ![]() | NOTE: Information that is useful but not critical to the reader.
CAUTION: Tells the reader to proceed with caution.
WARNING: Stronger than CAUTION; means "don't do this" or that this step could be irreversible, e.g., result in permanent data loss. |
TIP | | Useful tips that provide additional information. |
Procedure | 1. 2. 3. | Procedures are numbered steps to perform an action, where the order of the steps is relevant. |
Result of procedure/action | ⇒ | Indicates the result of an action//procedure. |
Lists | • • | Used for listings and items where the order of steps is irrelevant. |
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You merely require a sound broadband connection to use this Snom IP telephone with your NFON telephone system.

All telephones you receive are preconfigured and connected to the telephone system.
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You have the option of voice encrypting (SRTP) your telephone calls. You can activate this function for your customer account via the Administration portal at any time.
1. Activate the function in the Administration portal.
2. Restart all telephones.
Keep in mind that restarting may take a few minutes. During a conversation, a lock icon on the telephone display indicates that the encryption is activated.
⇒ The active call is now encrypted.
The basic function of Hot desking allows cancelling the registration of existing users and registering new users to your Snom end device.This is useful when employees frequently change their workstation but do not take along their end devices. After completing the registration process, your configuration is automatically transferred to a new telephone.
1st step: Cancelling the registration of the current extension
1. Click on Menu.
2. Click on Telephone settings.
3. Click on Cancel registration of an extension.
4. Click on Confirm.
⇒ The registration of the extension is cancelled and the telephone is restarted. This may take some time.
2nd step: Registering a new extension
1. Click on Menu.
2. Click on Enter extension number.
3. Click on Confirm.
4. Enter your voicemail PIN.
5. Click on Confirm.
⇒ The new extension is registered now. This may take some time.
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Where can you get help?
In addition to the login, help and download pages on phonetotal.planet33.com, the following sources are available for help:
planet 33 service & support: | Technical Support: The planet 33 technical team will be happy to take care of your request! Hourly rate: 77,- € net, billing in 15-minute intervals. Make an appointment at: support(at)planet33.com / Online Remote-Support |
phone total | Administration of the entire phone total system with manual and download links. |
phone total Userportal: | https://userportal.planet33.com Extension settings, eFax sending etc.: In the phone total user portal you can make settings for individual extensions of your telephone system. In the upper right-hand area of the screen there is a Help(?) button for context help with useful tips on configuring your extension. |