The 27-year-old former Cambridge man has strong experience of League Two, which Cox feels will serve the Iron well amongst a number of other strengths.
He told iFollow Iron: "I think it's an excellent signing and just what we were looking for. He has a lot of experience in this league and is a leader.
"He wanted to come and play for this football club. I've seen him many times when he played for Cambridge. He wants to win the ball and can play, and he can head it in both boxes. League Two football is about what happens in both boxes.
"He's an organiser, and is ready for a battle and that's what I wanted to hear. He's a character, who wants to win on the training pitch as well as in the matches.
"We thank Bolton for their help, he comes into our squad and we'll get him ready for the Bradford game.
"He's come to play games and we'll look at him in training on Friday and see where we go from there."
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