Chapter 7. Understanding Telephony
Utility is when
you have one telephone, luxury is when you have two, opulence is
when you have threeand
paradise is when you have none.
Doug Larson
We're now going to take a break from Asterisk
for a chapter or two, because we want to spend some time discussing
the technologies with which your Asterisk system will need to
interface. In this chapter, we are going to talk about some of the
technologies of the traditional telephone networkespecially those
that people most commonly want to connect to Asterisk. While tomes could be written
about the technologies in use in telecom networks, the material in
this chapter was chosen based on our experiences in the community,
which helped us define the specific items that might be most
useful. Although this knowledge may not be strictly required in
order to configure your Asterisk system, it will be of great
benefit when interconnecting to systems (and talking with people)
from the world of traditional telecommunications.
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