How to setup DND Asterisk?

Question

Asterisk

Good day!
A question about DND on Aster ... as far as I know, the *78 command typed on a softphone (for example) is responsible for enabling DND mode, and so Aster issues
to extension '*78' rejected because extension not found in context
means it needs it the context in which it's all spelled out .... But the service codes are like the standard functions of Aster ... why doesn't it work?
Thanks in advance
PySY is not very strong in Aster, I just started to study, therefore I ask you not to swear much

Answer 1

there is no DND in the bare asterisk, etc.
everything is screwed up in FreePBX,
you can do the same yourself by setting flags in the internal database by dialing a specific number

Answer 2

If there was a bare asterisk assembly from scratch, then maybe you should check features.conf where all the codes are indicated, for translations, redirects, etc., the default context for these cases is also indicated.
I can make mistakes in writing a file with configs, but in my opinion everything is indicated in it.