Important Reminder

Finally, it is successful. Voice reminders are able to be set right through the phone. I was missing an important part in the extensions_custom.conf:

nano -w /etc/asterisk/extensions_custom.conf

If your installation is fresh outa the box like mine, then you will have to ADD (entirely):

[from-internal-custom]
exten => 123,1,Answer
exten => 123,2,Wait(1)
exten => 123,3,Authenticate(12345678)
exten => 123,4,Goto(reminder,s,1)

The context [from-internal-custom] is important. It should not be [from-internal-trixbox] like somewhere mentioned...

Be sure to amportal restart

I also added the Misc Destinations module via FreePBX web gui. And added..
Dial: 123
Description: Telephone Reminders

I also noticed that we had a rogue extension installed called "TESTY" which was using ext 1234. I don't know how TESTY got into the box, but it may have been affecting things as well.

So, it works now... the voice menus are a dance && 1/2 but it works.

I should point out that these phone reminders are the same module as the ones that we make with the web gui, but they don't actually require the Cepstral thing since you record the reminder using your very own home-grown voice.

Congratulations, you now have a very complex prank calling system.

DJ@Reminderland

[EDIT]
Asterisk 1.6 ? Not quite done yet... see here