How to handle outgoing extensions in the keyphone system

摘要

end. TECHNICAL FIELD OF THE INVENTION;And a method of processing a calling extension number in a keyphone system.;I. Technical Problems to be Solved by the Invention;And provides the calling extension number of the key telephone system to the called party.;All. The point of the solution of the invention;When the called party requests a calling number, the DDI / DID number of the calling extension is sent to the called party.;la. Important Uses of the Invention;Used in keyphone system.