To display call pop-up windows and ensure the Asterisk provider works correctly in the Docker instance, you need to use either a daemon in the Docker Compose environment or add a line to the crontab. Choose one of these approaches (either the daemon or the crontab line).
!!! note
This configuration is displayed for the [official EspoCRM container](../../administration/docker/installation.md#install-espocrm-with-docker-compose).
Add the following container to your docker-compose.yml file:
espocrm-daemon-voip:
image: espocrm/espocrm:latest
container_name: espocrm-daemon-voip
volumes:
- espocrm:/var/www/html
restart: always
entrypoint: []
command: ["php", "/var/www/html/command.php", "voip", "Asterisk"]!!! important
This line should be added under `root` or other docker user.
* * * * * /usr/bin/docker exec --user WEBSERVER_USER -i ESPOCRM_DOCKER-CONTAINER /bin/bash -c "cd /var/www/html; php -f command.php voip Asterisk" > /dev/null 2>&1Replace WEBSERVER_USER with one of the following values: www-data, www, apache, etc., depending on your web server.