Chapter 19. Fax

Table of Contents

What Is a Fax?
Ways to Handle Faxes in Asterisk
Obtaining spandsp
Compiling and Installing spandsp
Adding the spandsp Library to Your libpath
Recompiling Asterisk with spandsp Support
Disabling spandsp (Should You Want to Test Digium Fax)
Digium Fax For Asterisk
Obtaining Digium FFA
Disabling Digium FFA (Should You Want to Test spandsp)
Incoming Fax Handling
Fax to TIFF
Fax to Email
Fax Detection
Outgoing Fax Handling
Transmitting a Fax from Asterisk
File Format for Faxing
An Experiment in Email to Fax
Fax Pass-Through
Using Fax Buffers in chan_dahdi.conf

Have no fear of perfection. You’ll never reach it.

Salvador Dali

The concept of facsimile transmission has been around for over 100 years, but it was not until the 1980s that the use of fax machines became essential in business. This lasted for perhaps two decades. Then the Internet came along, and very shortly after that, the fax quickly became almost irrelevant.