How to operate the branch office function in the keyphone system

摘要

The present invention relates to a branch office branch in a key telephone system. More particularly, the present invention relates to a branch office branch in a key telephone system, in particular, a subscriber using a key telephone system, when a CO line is ringing on another extension, The present invention relates to a method of operating a mobile communication terminal and a mobile communication terminal, and more particularly, to a mobile communication terminal having a mobile communication terminal, Quot; # " button by pressing the " # " button, the user must hold another handset to hold the handset, either the key telephone or the general telephone. So that it can be selected for use, When a call is ringing, the subscriber who has the function of branching an incoming call trunks the incoming trunks to pick up the trunks, which is very convenient especially for ordinary telephone users.