No, system max is 32 members in a CX or regular MXe, and 64 in an expanded MXe with a second processor.
I believe its only 250 if your running on an ISS server.
From 39 page of the engineering guide:
"On most systems, this will be less than the physically provisioned limit of E2T channels. Paging groups should be
configured with this limit in mind. Limit the number of members in a page group to:
32 for MXe (base) controllers
64 for AX, LX, expanded MXe, and MXe Server controllers.
Note that in the CX/CXi and AX systems the number of available echo cancelers might be far below the numbers shown here, depending on the specific combination of MMCs installed."