# What does the VARTA error `dial_failed` mean?

The telephony provider rejected or failed to place the dial.


**HTTP status:** `502`  ·  **Type:** `provider_error`

## What it means

The telephony provider rejected or failed to place the dial.

## What causes it

Raised when the LiveKit SIP participant creation call itself raises (`backend/app/services/telephony.py`), reached from `POST /v1/calls` with `dial: true`. The underlying provider exception is logged server-side, not returned to the caller.

## What to do

Retry — this is typically transient carrier or provider trouble. Quote the `request_id` if it persists.