Kirk Eady, 46, allegedly used a public web site to place phone calls to four Hudson County Correctional Center employees between March and July of 2012.
The site Eady used allowed him to "conceal the telephone numbers from where the calls originated and also call and record two people simultaneously and make it appear as those people, and not Eady, originated the call.
Eady recorded the conversations without telling the correctional center employees he was doing so.
He also allegedly admitted to a cooperating witness that he recorded conversations with three of his fellow employees.
Eady is facing is a maximum potential
penalty of five years in prison and a $250,000 fine.