By Nir Simionovich
Start with AGI improvement and use the dynamic gains of Asterisk AGI to construct your individual VoIP-based telephony procedure. This publication is meant for builders wishing to make use of Asterisk, approach directors wishing to realize higher keep watch over over their Asterisk deploy, and telephony provider services wishing to install Asterisk-based ideas to their infrastructure. you're anticipated to have a few event with Asterisk and a uncomplicated figuring out of programming. No wisdom of Asterisk programming is needed.
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Additional info for Asterisk Gateway Interface 1.4 and 1.6 Programming
DIALSTATUS - This is the status of the call: CHANUNAVAIL | CONGESTION | NOANSWER | BUSY | ANSWER |CANCEL | DONTCALL | TORTURE | INVALIDARGS For the Privacy and Screening Modes, the DIALSTATUS variable will be set to DONTCALL if the called party chooses to send the calling party to the 'Go Away' script. The DIALSTATUS variable will be set to TORTURE if the called party wants to send the caller to the 'torture' script. [ 44 ] Chapter 2 This application will report normal termination if the originating channel hangs up, or if the call is bridged and either of the parties in the bridge ends the call.
Other multi-frequency systems are used for signaling internal to the telephone network. org/ wiki/DTMF Wait a minute! Didn't we process user input already in the previous chapter? Well, not exactly. In the previous chapter, we developed an automatic attendant, which was capable of accepting a user input, and then route a call according to it. User input usually refers to information having no direct relation to our dialplan. The best example would be a bank IVR that asks you to enter your bank account number, and then determines what to do with your call.
The dialplan directive just seen will play the file read_id_number back to our user. The file may consist of a message such as "Please enter your ID number, followed by the # key". We've defined the input to be of any length, so our users can press the # key, or simply timeout on the input. We've not used any of the channel options, as we want our user to come online before entering any information. We're allowing our user up to three attempts, to enter the ID number. This means that the message will be played back, up to three times.