An apparatus for receiving a signal frame containing a Fast Ethernet signal, said frame been transmitted through a SDH/SONET point-to-point radio link communication system, wherein the apparatus comprises means for the STM-1 alignment and for interpreting the pointer and wherein it further comprises means for unpacketing the payload of the frame received, means for reading the header of each extracted packet, in order to identify the origin source and to re-build the original signal by allocating the packet to the proper destination interface.