# What does the VARTA error `telephony_not_configured` mean?

This deployment has no telephony provider wired up.


**HTTP status:** `503`  ·  **Type:** `provider_error`

## What it means

This deployment has no telephony provider wired up.

## What causes it

Raised when no provider is configured: the default no-op provider (`backend/app/services/telephony.py`), or the LiveKit provider missing `LIVEKIT_URL`/`LIVEKIT_API_KEY`/`LIVEKIT_API_SECRET` or the `livekit-api` package — reached from `POST /v1/calls` with `dial: true` (`backend/app/api/v1/calls.py`).

## What to do

Omit `dial` to prepare the session and place the call with your own dialer, or configure LiveKit credentials and register a trunk.