itsp/MaxStates is a SAP Parameter attribute which is used to control SAP Gui for HTML, maximum syncronisation states information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
Maximum number of possible screen statuses for a Basis screen.
Example
A Basis screen with 3 subscreens can display the subscreens 100, 200,
300 or 100, 200, 400, where 300 and 400 are alternatives to each other.
Since there are no other combinations, there are two screen statuses for
Basis screen 1000.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.