pf.xml

<?xml version="1.0" encoding="UTF-8"?> 
	<Response>
		<Gather action="http://neiodev.serveo.net/security/TwilioPhoneChallengeCompleted" timeout="45" finishOnKey="#">
			<Say voice="woman">This is Centrify's Multifactor authentication. Please press any key followed by pound sign to complete your authentication</Say>
		</Gather>
		<!-- Will only come here after timeout expires -->
		<Say voice="woman">We didn't receive any input. Goodbye!</Say>
		<Hangup/>
	</Response>