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 This HOWTO will attempt to explain how to integrate "Click-to-Call" functionality from Open For Business to an Asterisk Server running the Asterisk Manager API*.  *Note: REQUIRES Java JDK 1.5+*

Setting Up Asterisk 

Because of the process priority that Asterisk must take for quality voice transmission, you'll want to run Asterisk from its own box.  This makes TrixBox a perfect solution to accomplish this.  It is a Centos OS distribution with Asterisk and FreePBX built in.

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This is a service that invokes a simple-method and just needs a few parameters to initiate the click to dial call.  You can use your imagination on how to invoke it and pass the parameters (ie form, hyperlink, other services, etc).  Please be cautious of security though because you are likely giving OFBiz access to an outside line that someone could use. 

1. originatingChannel
   1. Wiki MarkupThis is the first channel to call.    Should be in the format of IAX2/\[extension\] or SIP/\[extension\].
      1. I will do some testing to see what format it needs to be in for the originatingChannel to be POTS number possibly something like ZAP/[outsideNumber]
2. extension
   1. This is the second channel to call.  This is usually just the phone number.  Your dialplan in asterisk should determine how to handle this.
3. priority
   1. I don't have all the details on what this does.  If not provided, the service will assume "1" which I believe takes top priority (ie call now)
4. context
   1. This is the context that it will invoke from in the dial plan.  I haven't done much experimenting here yet.  This is likely where you'll want to implement security.
5. actionTimeout
   1. The timeout in milliseconds for the action to complete, in this case I believe it is the cumulative time it takes for the first channel to answer and the second channel to respond