An apparatus for and a method of allocating D-channel to minimum channel when performing a basic rate interface (BRI) in WLL, in which D-channel is allocated to the minimum channel when connection is made to V5.2 of WLL exchanger and BRI, while satisfying WLL standards, and system maintenance and extension...http://www.google.com/patents/US6584085?utm_source=gb-gplus-sharePatent US6584085 - Apparatus for and method of allocating D-channel to minimum channel when performing basic rate interface service in wireless local loop network system