A wireless communication unit (CU) (FIG. 4), corresponding network
controller (FIG. 5), and methods (FIG. 8, etc) operate to route calls and
facilitate a call handover from one wireless network to another. The CU
comprises a transceiver 403 suitable to support an air interface with a
first and second wireless communication network 304, 305; a memory 415
operable to store information 431 suitable for identifying an enterprise
controller; and a controller 405 configured to facilitate setting up a
call. The controller thereafter if the call needs to be handed over from
one to another of the first and second communication network, uses the
information to facilitate identification of a unique one of a plurality
of enterprise controllers for effecting a hand over of the call.