Page 172 - Asterisk™: The Future of Telephony

exten => _91NXXNXXXXXX,n,Playtones(congestion)
exten => _91NXXNXXXXXX,n,Hangup()
These two include statements make it possible for callers in the [employees] context
to make outbound calls. We should also note that for security’s sake you should always
make sure that your [inbound] context never allows outbound dialing. (If by chance it
did, people could dial into your system and then make outbound toll calls that would
be charged to you!)

Conclusion

And there you have it—a basic but functional dialplan. It’s not exactly fully featured,
but we’ve covered all of the fundamentals. In the following chapters, we’ll continue to
add features to this foundation.
If parts of this dialplan don’t make sense, you may want to go back and re-read a section
or two before continuing on to the next chapter. It’s imperative that you understand
these principles and how to apply them, as the next chapters build on this information.

144 | Chapter 5: Dialplan Basics