Resumen:
Today the use of a private central exchange (PBX) is essential for any organization and in this environment
usually happens when called by telephone to a user, whose line is busy, there is a need to insist on treating to carry
out communication, trying to call again after waiting a reasonable time, but often do not have the time or for some
reason forget to retry the call, which could be very important for the caller. Hence the objective of this project is to
demonstrate that Asterisk can provide very specific functionality as described in this project and allow it to
compete with proprietary telephony systems. In the first chapter details the background, objectives and rationale of
this study, the second comprised the essential concepts for implementation thereof, in the third chapter describes
the technical specifications and project development and in the fourth chapter specifies how work and tests carried
out.
