# Numbers

The phone.systems(TM) PBX allows you to configure third-party **Phone Numbers** and **Internal Numbers** for call
handling, and manage their routing in the **Dial Plan**.

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**Phone Numbers**

Add, edit, and manage phone numbers for inbound routing, caller ID, and related configurations.

[Phone Numbers](phone-numbers.html)

**Internal Numbers**

Create, edit, and manage internal extensions for routing, caller ID, and PBX configurations.

[Internal Numbers](internal-numbers.html)

**Dial Plan**

View and manage where phone numbers and internal numbers are routed.

[Dial Plan](dial-plan.html)