Patent ID: 6212395
Filing Date: 2001-04-03
Classification: H04M,H04W

Abstract:
A cellular private branch exchange system for facilitating cellular communication for a first plurality of mobile station units, said cellular private branch exchange system also being configured for coupling with a public switching network, said cellular private branch exchange system comprising:a first base station for communicating with first and second mobile station units of said first plurality of mobile station units on respectively a first and a second cellular bearer data channels wherein said first mobile station unit communicates with said second mobile station through said first base station; anda cellular private branch exchange unit coupled to said first base station subsystem, said cellular private branch exchange unit being associated with at least one given public switching network telephone number known to said public switching network, said cellular private branch exchange unit comprising:(a) a private mobile-services switching center for providing, in a cellular domain, mobility management for said first plurality of mobile station units, said private mobile-services switching center representing a first cross-connect node capable of cross-connecting said first cellular bearer data channel with said second cellular bearer data channel for calls between said first and said second mobile station units;(b) a private registry coupled to said private mobile-services switching center, said private registry being decoupled from a registry associated with said public switching network, said private registry storing subscriber information pertaining to said first plurality of mobile station units, and(c) a private exchange block for handling, in said cellular domain, call control for said first plurality of said mobile station units wherein said cellular private branch exchange system facilitates said cellular communication between said first mobile station unit and said second mobile station unit even if said first mobile station unit and said second mobile station unit are unknown to said public switching network.