On the first day of the Conference, the Donatists challenged the list of the signatures of the Catholic bishops on the document in which they had assigned their representatives. A roll call followed, in which the tribune Marcellinus, who presided, called the Catholic bishops one by one, and their Donatist counterparts were to identify them. Then the roll call proceeded in the opposite way, with the Donatist bishops identified by the Catholics.
As Serge Lancel remarks in his note, the text suggests that the function of the presbyter and deacon is performed by the same person ("est presbyter et diaconus, (...) quem"), but this seems hardy possible.
The meaning of "suspension" is not exactly clear, but it refers rather to some kind of physical torture than to a canonical prohibition of carrying out the priestly office.