If you would like to connect to another number than the one that you are replacing on your website, you can ask your developers to add this string to your code snippet.

__fs_conf.push(['addNumberConfiguration', ['08-50 92 50 10', {'connect_to':'08-50 92 50 20'}]]);

In the example, the number 08-50 92 50 10 will be replaced with a Kaisa number on the website, but the number that the Kaisa number will connect to is 08-50 92 50 20.

Please note that this second number that the calls are going to connect to needs to be added to Allowed Numbers as well.

It is how your code snippet could look with this string added.

<script type="text/javascript">
 var __fs_conf = __fs_conf || [];
 __fs_conf.push(['setAdv',{'id': 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxx'}]);
 __fs_conf.push(['addNumberConfiguration', ['08-50 92 50 10', {'connect_to':'08-50 92 50 20'}]]);
</script>
<script type="text/javascript" src="//analytics.freespee.com/js/external/fs.js"></script>