> ## Documentation Index
> Fetch the complete documentation index at: https://docs.leamout.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Connectivity overview

> How carrier connections, trunks, endpoints, and numbers form a telecom route.

Connectivity is independent from runtime placement in Leamout.

For BYOC, the route is built from organization-owned resources:

```text theme={null}
carrier provider
    |
carrier connection
    |
trunk
    |
trunk endpoint(s)
    |
SIP carrier
```

Phone numbers can be assigned to a carrier connection for inbound ownership. Voice applications bind numbers to application behavior.

Carrier connections hold authentication and policy. Trunks describe routable service. Trunk endpoints are the physical SIP destinations selected by health, priority, and weight.