Telephone subscriber identification device - memorises numbers of called and calling subscriber in private exchange during conversation

摘要

A user identification device is a private telephone install at ion has an automatic exchange with multiple access point and permits connection between any two subscribers. A first access is established to the exchange at the begining of a conversation and the callers number is memorized An identification device to the second exchange access is activated by the first access and applys a liaison thereto characteristic of the callers number. The second access is selected with the dn of the connection signal received through the echange. The called number is memorized by the identification device and is selected as well as actuation of an operating device during the conversation to store the numbers until the conversation ends.