Has she got toys at the end of her bed she can play with when she wakes up? Maybe tell her not to call out, but to play with her toys instead? You'll probably laugh at that suggestion, but it's amazing how much kids comprehend at that age! I gave my DS2 a Fisher Price Ocean Wonders musical cot toy a few months ago and told him if he wakes up before us he can press the button to make the toy play (it has lights, music and bubbles). It works great!