Is it possible to make with a 1252 a multipoint to point connection, on central building that connect two different buildings, and what about the antenna connections, there are three connections but is it possible to connect 2 antennas one for one building and the other for the other building ?
On bridges set up in a point-to-point configuration, set the RTS threshold to 4000 on both the root and non-root bridges. If you have multiple bridges set up in a point-to-multipoint configuration, set the RTS threshold to 4000 on the root bridge and to 0 on the non-root bridges.
This example shows how to set the RTS threshold on a bridge to 4000 bytes:
bridge(config-if)# rts threshold 4000
This example shows how to set the RTS retries count to 3:
AP(config-if)# rts retries 3
This example shows how to reset the parameter to defaults: