Yes, your inmate must dial your number to call you. If he did not bring a list of numbers with him, or he does not know your number you will need to send him a letter or a postcard so that he may put the number on a calling list.
https://www.inmateaid.com/ask-the-inmate/does-the-inmate-need-my-number-to-call-me-or-is-it-listed-on-his#answer
Accepted Answer Date Created: April 04,2016