[Freeswitch-users] Calling extension using ruby

I am trying to make an application that can initiate a call from the Web app to a PSTN line. So when a user clicks on call, the PSTN line will ring, and FS will play the text entered on the web app to the PSTN. I am able to dial the PSTN from a SIP phone(Zoiper). I am also able to call the PSTN line from the CLI, but I have no clue as to how to eliminate the SIP Phone all together. I can connect to FS using ESL, and send the command to initiate a call, but since no user is registered without the SIP phone registering them, I am not sure how to go ahead. Any help is appreciated!