Edit the WEB-INF/web.xml file and set the following init-params:<init-param>
<param-name>enable_cti</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>clientConfig.pushServiceType</param-name>
<param-value>CONTINUOUS</param-value>
</init-param>