The 12-key LCD and other expansion modules allow the Shift button under some circumstances but deny it in others.
The 12-button LCD KEM for the 12XX was mentioned above.
If there is a single module, it supports Shift on Device Adapter.
This requires two pages.
If there are two modules, Device Adapter allows the first KEM to have 24 buttons, as two pages of buttons, but the second KEM cannot be shifted. Communication Manager allows only three pages.
This requires three pages, but the first two are used by the first module and Shift.
If there are three KEMs, none of them can Shift.
The 18-button KEM for the 11XX has two pages when you have a single module, using the 11XX shift key to access the second page.
This yields an effective increase of up to 36 buttons. Two module button pages are used.
Number of pages: 2
Buttons per page: 18
Number of physical modules: 1
However, because the 11XX stations are limited to no more than 54 added buttons, if you add a second KEM, you also get 36 as the maximum added number of buttons. The first KEM cannot use the Shift because the second KEM cannot use the Shift.
Again, two module button pages are used.
Number of pages: 2
Buttons per page: 18
Number of physical modules: 2
If a user wants to have between 37 and the maximum 54 additional buttons, then three KEM modules are needed, without Shift. Three module button pages are used.
Number of pages: 3
Buttons per page: 18
Number of physical modules: 3
The 18-button soft KEM for the 2050 soft client is treated the same as the 18–button KEM for the 11XX.
The 24-button KEM for the 200X has two pages when you have a single module, using the 200X Shift key to access the second page.
This yields an effective increase of up to 48 buttons. Two module button pages are used.
Number of pages: 2
Buttons per page: 24
Number of physical modules: 1
However, since the 200X stations are limited to no more than 48 added buttons on Device Adapter, if you add a second KEM, you also get 48 as the maximum added number of buttons. Neither KEM can use a Shift because that would require an additional page on Communication Manager.
