Asterisk, how to make it show names instead of extension number when calling?

Question

Asterisk

Hello, I'm learning pure Asterisk, without a web interface.
I want that when calling from one softphone to another, names are displayed, and not a phone number.
Which file should be edited, sip.conf or another, and what lines should be added to determine the name for the extension?

Answer 1

in sip.conf, callerid="name", I don't remember exactly
UPD: I just checked, it's true, this is sip.conf and this is extensions.conf