Apache - http requests redirected to https

I am trying to provision a Cisco Phone via the Apache server in my Elastix install. My problem is that I can´t seem to handle HTTP requests accordingly. Every time the phone requests a file, the server replies with a 302 and a Location line pointing to https.

I configured a virtual host according to Apache´s Documentation, and netstat -atnp shows port 6970 for my IP just fine.

How can I stop Apache from redirecting to secure http and serve the file instead? Where is this rewriting / redirection happening?

Many thanks in advance.