Communication system

Communication system analog-to-digital converter using echo info

Communication system and a central processing unit as well as a

Communication system and a method for controlling a connection i

Communication system and a private branch exchange to be used in

Communication system and apparatus

Communication system and communication devices having lock funct

Communication system and communication method

Communication system and devices thereof

Communication system and equipment

Communication system and method for determining the location of

Communication system and method for determining the location of

Communication system between communication cards mounted separat

Communication system bypass architecture

Communication system capable of detecting missed messages

Communication system capable of preventing dropout of data block

Communication system comprising a communication line monitor for

Communication system comprising overlayed multiple-access transm

Communication system configuration data management

Communication system control arrangement