> ## Documentation Index
> Fetch the complete documentation index at: https://docs.get2dial.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Inbound calls
> Route incoming calls to a queue, IVR menu, ring group, or voicemail using a routing rule matched to the number.
Every inbound call is directed by a **routing rule**: a rule that matches a phone number and
sends the call to a destination. This page is the map for how that works before you build
your first one.
## How it fits together
A routing rule sits between a phone number and everything downstream of it:
```mermaid theme={null}
flowchart LR
A[Phone number] --> B[Routing rule]
B --> C[Queue]
B --> D[Ring group]
B --> E[IVR menu]
B --> F[Voicemail]
B --> G[Extension]
E --> C
```
A routing rule matches on the dialed number (the DID) and sends the call to one destination
type: a **queue** (agents distributed by strategy), a **ring group** (agents rung together),
an **IVR menu** (which itself can hand off to a queue), **voicemail**, or a specific
**extension**. Routing does not live on the phone number itself — a number with no matching
routing rule doesn't ring anywhere, even if the number is otherwise correctly configured.
See [How Get2Dial works](/get-started/how-get2dial-works).
## Common tasks
## Learn more