Communication Manager provides three additional button pages that can be programmed. If a fourth page is needed, the page will not be available. Therefore, a CS 1000 endpoint with the extra page will have fewer buttons after migrating.

CS 1000 had inconsistent numbers of available buttons based on the number of modules. For example, modules with a total button count, including the shifted values, lower than the maximum might be able to use a Shift. If the total count exceeds the maximum, all modules could become un-shifted. Therefore, the next step up from three modules with Shift could be seven modules without Shift.

Mapping this into Communication Manager, Device Adapter uses a fixed page size, which may or may not be on one module. For example, if 18 buttons exist per module, and the module can have up to two pages, then there will be two pages for a shifted module.

As a result, in certain cases the total number of expansion modules or the total number of possible buttons decreases with Communication Manager.

However, in CS 1000, the user can access the fourth page of buttons on the second module in a two-KEM setup (assuming two were used). The user can also access the fourth page by having four expansion modules.

This is not supported with Device Adapter.