I coudn't find an admin guide or something for MCU5300 series. I want to learn that if the ports are flexible or not. You know it supports up to 20HD or 40SD ports. Is it possible to make it support 10HD ports and 20 SD ports at the same time like Polycom RMXes? Or do I have to select one mode (HD or SD) and use only them in this mode?
From what I understood its the features of the MSE8510 in a standalone MCU.
On the MSE8510 its not possible, so I say:
No, its not possible to have a flexible port configuration.
So yes, its a fixed setting.
Here some older posting about the MSE8510: