Hi Crestron users

Does someone know the speed and technical specification of the Cresnet II RS485 communication?
I think it is a seriel connection running at 38400 baud but I'm not sure. I know it is a multimaster system but what about collisions? If I use a two-way seriel driver, there is a "break" input. What is this for?
I was thinking about connecting the Cresnet II to a one of the seriel ports on a CNMSX-PRO and then use a seriel debugger to see what is going on.

The reason for asking is because I need to make a multichannel DAC that is compatible to one of the modules Crestron is offering. It is a 20 channel 0-10V DAC for driving all my dimmers.

Happy New Year from Denmark.

regards

Claus