# Adding a new phone number

## Prerequisites

- Ensure that Dialing Rules have been defined properly.

- You must not prefix the codes.

1. On the top bar, click System Options > System Settings.
2. In the System Settings dialog box, click Phone Numbers.
3. In the Phone Numbers panel:
   1. Click Add.
   2. Click the untitled item and rename the item.
   3. Enter a valid phone number.

   The phone number can be an extension number, a PSTN number, or a mobile number.

4. Click OK.

   The system saves the new phone in the phone list.

Related information
Phone Numbers panel field descriptions
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