Typically the accused must make a first appearance in a criminal matter to enter a plea of guilty, not guilty or no contest at the arraignment before any other proceedings occur such as a pre-trial hearing.If there is a pre-trial hearing concerning the matter where you are incarcerated, then it seems to me that there was an arraignment where a plea was entered by you. However, with respect to the alleged pre-trial hearing concerning charges filed against you in another county where you have not even made an appearance, it does not make sense that there is a pre-trial hearing scheduled for that. I suspect that the hearing as to the matter that you have not been extradited for is the first appearance, the arraignment.If you have not consulted with a criminal defense attorney concerning your matters, I suggest that you do so.