extensions.conf

[op_outgoing3]
exten => 1,1,BackgroundDetect(nothing|500|300|1050)	# nothing is a 3 sec blank file
exten => 1,2,Hangup						# you could also play file first
exten => talk,1,Queue(op_ready|tn|||2)			# this was a hit, toss in queue
exten => talk,2,Playback(vm-isunavail)			# no agents, play ‘call from’
exten => talk,3,Hangup					# 	info as required
exten => t,1,Playback(vm-isunavail)				# simple timeout, this is when 
exten => t,2,Hangup						#	noone answered on 
								#	outbound attempt

call file

Channel: IAX2/tbsprod@NuFone/14088660517
MaxRetries: 0						# 1 attempt
WaitTime: 20						# 4 rings
Callerid: 408xxxxxxx					# our callerid
Context: op_outgoing3				# context to run upon connect
Extension: 1						# exten to run upon connect
Priority: 1						# priority to run upon connect