callback.info

asterisk用 的voip记费软件

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									CALLBACK
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CALLBACK

	The Document Explains you following topics
	1. Introduction
	2. Basic description of the Callback
	3. Table CallBack
	4. CallBack Solution
		4.1 Web Callback
		4.2 ANI Callback
		4.3 DID Callback
		4.4 API Callback.



1. INTRODUCTION
	
	Astersik2Billing provides an extensive functionality to handle the Callback.
	It supply solutions for Web Callback, ANI Callback, DID Callback, API Callback.



2. BASIC DESCRIPTION OF THE CALLBACK

	Description of the Callback in 10 steps :
	
		1. The client makes a phone call to one of our access numbers. His Caller ID information 
		must be available from his phone carrier (not blocked).
		
		2. The server sees the incoming call and processes it with the appropriate context (ex. cid-callback)
		
		3. The custom_calling_card context will call the AGI provided with A2Billing (a2billing.php) and uses it in cid-callback mode. 
		
		4. The AGI will check the detected Caller ID and check if it’s an existing client. 
		If that is the case, it will schedule a callback for that client and it will hang up the line.
		
		5. A few seconds later, the server calls the client and use an another context that will let A2Billing know that this is the 
		2nd phase of a callback process.
		
		6. A2Billing will use the number called to lookup various account specific information (account balance, currency settings, and so on).
		
		7. As soon as the client picks up the line, A2Billing will play his remaining balance, and invite him to dial a number
		
		8. The client dials a number
		
		9. A2Billing will tell the maximum time for the call and so on.
		
		10. ...
		
		
		
3. TABLE CALLBACK_SPOOL

	
	id					Id of the table
	uniqueid 	 		Unique ID to cross-check with other platform 
	entry_time			Time the record is stored in this table
	status 	 			enum('NEW', 'QUEUE', 'SENT', 'UPDATED', 'DEAD')	
	server_ip 	 		Server IP receive the callback to initiate and handle
	
	num_attempt			number of attempt
	last_attempt_time	Time the record is stored in this table
	manager_result		Originate
	agi_result			Ok, Hangup, etc...
	
	callback_time		Time to start to initiate the callback
	
	channel				Channel on which to originate the call (SIP/123@1.1.1.4)
	exten				Extension to use on connect (must use Context & Priority with it)
	context				Context to use on connect (must use Exten & Priority with it)
	priority			Priority to use on connect (must use Context & Exten with it)
	application			Application to use on connect : meetme or other (use Data for parameters)
	data				Data if Application parameter is used
	timeout				Timeout for the connection to happen (30000)
	callerid			CallerID to use for the call
	variable			Callback info for Asterisk (variable list to transfer to the channel) var1=23|var2=24|var3=25 
	account				Account code for the call for billing purpose
	async				For the origination to be asynchronous (allows multiple calls to be generated without waiting for a response)
	actionid			The request identifier. It allows you to identify the response to this request. You may use a number or a string. 
						Useful when you make several simultaneous requests. ActionID: ABC45678901234