3-Digit Extension Dialling

Document Metadata

Category: Guides → 3-Digit Extension Dialling
Audience: Administrators, Engineers, Telephone Systems/IT Support Teams
Difficulty: Beginner to Intermediate
Time Required: 5–10 minutes
Prerequisites:

• Access to the account or customer portal for your PBX/Switch.
• Ability to define internal number blocks and alias assignments.

Related Topics: Internal Number Block configuration (for defining extension ranges), Alias creation (for mapping extensions to user lines)
Next Steps: Configure the number block → Create aliases for each extension → Document internal extensions in the phonebook for reference.

You can set up 3-digit dialling in several ways. This is a basic setup for quick deployment.

1. Set up an Internal Number Block for the customer.

   

2. Set up an Alias for each extension.

   

3. Document internal extensions in the Phonebook (this step isn't so much functional as a reference).