Chapter 8. Voicemail
Just leave a message, maybe I’ll call.
Before email and instant messaging became ubiquitous, voicemail was a popular method of electronic messaging. Even though most people prefer text-based messaging systems, voicemail remains an essential component of any PBX.
Comedian Mail
One of the most popular (or, arguably, unpopular) features of any modern telephone system is voicemail. Asterisk has a reasonably flexible voicemail system named Comedian Mail.[88] Voicemail in Asterisk is provided in the dialplan by the app_voicemail.so module.
Some of the features of Asterisk’s voicemail system include:
Unlimited password-protected voicemail boxes, each containing mailbox folders for organizing voicemail
Different greetings for busy and unavailable states
Default and custom greetings
The ability to associate phones with more than one mailbox and mailboxes with more than one phone
Email notification of voicemail, with the voicemail optionally attached as a sound file[89]
Voicemail forwarding and broadcasts
Message-waiting indicator (flashing light or stuttered dialtone) on many types of phones
Company directory of employees, based on voicemail boxes
And that’s just the tip of the iceberg!
The default version of the /etc/asterisk/voicemail.conf configuration file requires a few tweaks in order to provide a configuration that will be suitable to most situations.
We’ll begin by going through the various options you can define in voicemail.conf, and then we’ll provide a sample ...
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