freeswitch/conf/vanilla/autoload_configs/blacklist.conf.xml

<configuration name="mod_blacklist.conf" description="Blacklist module">
<lists>
	<!--
		Example blacklist, the referenced file contains blacklisted items, one entry per line

		NOTE: make sure the file exists and is readable by FreeSWITCH.

	<list name="example" filename="$${conf_dir}/blacklists/example.list"/>
	-->
</lists>
</configuration>