freeswitch/conf/autoload_configs/sangoma_codec.conf.xml

<configuration name="sangoma_codec.conf" description="Sangoma Codec Configuration">

	<settings>
		<!--
		Comma separated list of codecs to register with FreeSWITCH, 
		by default (if this parameter is not set) all available codecs are registered.
		Valid codec values are: PCMU,PCMA,L16,G729,G726-32,GSM
		<param name="register" value="all"/>
		-->

		<!-- List of codecs to not register with FreeSWITCH, by default this is empty,
	        but you may want to not load PCMU and PCMA or may be others to not use your 
	        vocallo resources in codecs that are done well and fast in software.	
		<param name="noregister" value="PCMU,PCMA"/>
		-->
	</settings>

	<vocallos> 

		<!-- The name of the vocallo is the ethernet device name as displayed by ifconfig -->
		<vocallo name="eth5">
			<!-- Starting UDP port for the vocallo -->
			<param name="baseudp" value="5000"/>
			<!-- Starting IP address to use for the vocallo modules -->
			<param name="vocalloaddr" value="10.1.1.100"/>
		</vocallo>

	</vocallos>


</configuration>