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        | RE: Way more than fall-over to mobile phone |          |  
 Certain SIP User Agents do not handle Call Waiting properly, so having the option to turn it off is quite useful.
 Call Forking in a nutshell, allows an inbound call to an extension, to be delivered simultaneously to another extension or SIP URI.
 
 In essence, a Ring Group for every one of your extensions. Heady stuff, ain't it?
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