5.8. Key Issues: Telephony Applications
Telephony apps are programmed functions for the voice network. In Asterisk, sometimes commands used in the dial-plan configuration files, including extensions.conf , are called, merely, applications. This is somewhat of a misnomer, since the dial-plan commands themselves are just functional pieces of greater overall telephony apps.
Indeed, it's even correct to say that the dial-plan itself is a telephony application, albeit a more complex, more global one. Usually, at least in this book, a telephony application refers to a group of functions working together to produce a desirable result, just as all of the applications discussed in this chapter can be achieved by piecing together different software and hardware tools in the VoIP family.
Here are the most important points about telephony applications to remember when replicating them in a VoIP network: