The OSN2500 was blocked in "INSTALL STATE". it can not be uploaded of manually configured from the T2000. It can be only created on the T2000.
check the state of the NE with ":cfg-get-nestate;"
if the NE is in "install state"
send the command "cfg-verify". after sometime the NE can be uploaded on the NMS.
the NE is in "install state"