How to let PSTN or mobile phone call in?

hello all, is there some materials let PSTN or mobile to call softphones on asterisk? tks in advance!

for this you will need a voip provider to connect you to the pstn or a interface card or ATA to connect the PSTN lines to you asterisk box
Lots of info at this sight

voip-info.org/wiki/index.php?page=Asterisk