Communication server apparatus having distributed switching and

Communication server apparatus having distributed switching...

Communication server apparatus having four-wire switching interf

Communication server apparatus using digital signal switching an

Communication server apparatus using frequency multiplexing and

Communication server apparatus using frequency multiplexing...

Communication sessions for a commercial transaction using...

Communication switching system

Communication system

Communication system

Communication system and communication channel coupling method

Communication system and data communication method

Communication system between local area network stations

Communication system capable of displaying addresser...

Communication system control arrangement

Communication system having a changeable calling mode and termin

Communication system having a first and second communication pro

Communication system having a plurality of voice communication t

Communication system having telephonic function

Communication system having the capability of selecting an...