Communication terminal having function for displaying originator identification data

A key telephone system connected via at least one subscriber line to a network having a function for transmitting a plurality of ringing signals to the key telephone system at regular intervals, with an originator identification signal inserted in an interval between a k-th (k:

• a predetermined integer) ringing signal and a (k+1)-th ringing signal, comprising:
• a key telephone control unit connected to the network via the at least one subscriber line;
• and
• a plurality of key telephones connected to the key telephone control unit via extension lines;
• wherein the key telephone control unit includes
• ringing signal detection means for detecting the ringing signals transmitted from the network,
• originator detection means for detecting the originator identification signal transmitted from the network, and
• control means, connected to the ringing signal detection means and the originator detection means, for transmitting to at least one of the key telephones via corresponding ones of the extension lines, originator identification data corresponding to the originator identification signal detected by the originator detection means, the control means including means responsive to the ringing signals on and after the (k+1)-th ringing signal for transmitting an incoming call signal to the at least one of the key telephones via the corresponding ones of the extension lines;
• and
• wherein at least one of the plurality of key telephones includes
• means for receiving the originator identification data transmitted from the key telephone control unit via a corresponding one of the extension lines, and notifying a user of the key telephone of the received originator identification data, and
• means responsive to the incoming call signal transmitted from the key telephone control unit via the corresponding extension line, for notifying the user of the key telephone of an incoming call after notification of the received originator identification data is started.

A key telephone system connected via at least one subscriber line to a network having a function for transmitting a plurality of ringing signals to the key telephone system at regular intervals, with an originator identification signal inserted in an interval between a k-th (k:

• a predetermined integer) ringing signal and a (k+1)-th ringing signal, comprising:
• a key telephone control unit connected to the network via the at least one subscriber line;
• and
• a plurality of key telephones connected to the key telephone control unit via extension lines;
• wherein the key telephone control unit includes
• ringing signal detection means for detecting the ringing signals transmitted from the network,
• originator detection means for detecting the originator identification signal transmitted from the network,
• control means, connected to the ringing signal detection means and the originator detection means, for transmitting to at least one of the key telephones via corresponding ones of the extension lines, originator identification data corresponding to the originator identification signal detected by the originator detection means, the control means including means responsive to the ringing signals on and after the (k+1)-th ringing signal for transmitting an incoming call signal to the at least one of the key telephones via the corresponding ones of the extension lines, pseudo incoming call signal means for generating a pseudo incoming call signal independent of a detection result of the ringing signal detection means, and means for transmitting the pseudo incoming call signal generated by the pseudo incoming call signal means to the key telephones via the extension lines;
• and
• wherein at least one of the plurality of key telephones includes
• means for receiving the originator identification data transmitted from the key telephone control unit via a corresponding one of the extension lines, and notifying a user of the key telephone of the received originator identification data,
• means responsive to the incoming call signal transmitted from the key telephone control unit via the corresponding extension line, for notifying the user of the key telephone of an incoming call after notification of the originator identification data is started, and
• means responsive to the pseudo incoming call signal transmitted from the key telephone control unit via the corresponding extension line, for notifying the user of the key telephone of a pseudo incoming call corresponding to the pseudo incoming call signal at a time between a start of notification of the received originator identification data and a start of notification of the incoming call.

A private branch exchange system connected via at least one subscriber line to a network having a function for transmitting a plurality of ringing signals to the private branch exchange system at regular intervals, with an originator identification signal inserted in an interval between a k-th (k:

• a predetermined integer) ringing signal and a (k+1)-th ringing signal, comprising:
• a private branch exchange connected to the network via the at least one subscriber line;
• and
• a plurality of extension telephones corrected to the private branch exchange via extension lines;
• wherein the private branch exchange includes
• ringing signal detection means for detecting the ringing signals transmitted from the network,
• originator detection means for detecting the originator identification signal transmitted from the network, and
• control means, connected to the ringing signal detection means and the originator detection means, for transmitting to at least one of the extension telephones via corresponding ones of the extension lines, originator identification data corresponding to the originator identification signal detected by the originator detection means, the control means including means responsive to ringing signals on and after the (k+1)-th ringing signal for transmitting an incoming call signal to the at least one of the extension telephones via the corresponding ones of the extension line and
• wherein at least one of the extension telephones includes
• means for receiving the originator identification data transmitted from the private branch exchange via a corresponding one of the extension lines, and notifying a user of the extension telephone of the received originator identification data, and
• means responsive to the incoming call signal transmitted from the private branch exchange via the corresponding extension line, for notifying the user of the extension telephone of an incoming call after notification of the received originator identification data is started.

A private branch exchange system connected via at least one subscriber line to a network having a function for transmitting a plurality of ringing signals to the private branch exchange system at regular intervals, with an originator identification signal inserted in an interval between a k-th (k:

• a predetermined integer) ringing signal and a (k+1)-th ringing signal, comprising:
• a private branch exchange connected to the network via the at least one subscriber line;
• and
• a plurality of extension telephones including at least one standard telephone with no display function and at least one display-function attached telephone with a display function, the at least one standard telephone and the at least one display-function attached telephone being connected to the private branch exchange via respective extension lines;
• wherein the private branch exchange includes:
• ringing signal detection means for detecting the ringing signals transmitted from the network,
• originator detection means for detecting the originator identification signal transmitted from the network, and
• exchange control means connected to the ringing signal detection means and the originator detection means;
• the exchange control means having:
• destination determination means for determining whether a destination extension telephone is the at least one standard telephone or the at least one display-function attached telephone,
• first means operable when the destination extension telephone has been determined to be the at least one display-function attached telephone by the destination determination means, the first means adapted to transmit, to the destination extension telephone, originator identification data corresponding to the originator identification signal detected by the originator detection means, then to cause the destination extension telephone to display the originator identification data, and to transmit an incoming call signal to the destination extension telephone upon or after detection of the (k+1)-th ringing signal by the ringing signal detection means, thereby informing a user of the destination extension telephone of an incoming call, and
• second means operable when the destination extension telephone has been determined to be the at least one standard extension telephone by the destination determination means, the second means responding to detection of the k-th ringing signal by the ringing signal detection means by transmitting an incoming call signal to the destination extension telephone and thus informing the user of the destination extension telephone of the incoming call.

A key telephone system connected via at least one subscriber line to a network having a function for transmitting a plurality of ringing signals to a private branch exchange at regular intervals, with an originator identification signal inserted in an interval between a k-th (k:

• a predetermined integer) ringing signal and a (k+1)-th ringing signal, comprising:
• a key telephone control unit connected to the network via the at least one subscriber line;
• and
• a plurality of extension telephones including at least one standard telephone with no display function and at least key telephone with a display function, the at least one standard telephone and the at least key telephone being connected to the private branch exchange via respective extension lines;
• wherein the key telephone control unit includes:
• ringing signal detection means for detecting the ringing signals transmitted from the network,
• originator detection means for detecting the originator identification signal transmitted from the network, and
• exchange control means connected to the ringing signal detection means and the originator detection means;
• the exchange control means having:
• destination determination means for determining whether a destination extension telephone is the at least one standard telephone or the at least one key telephone,
• first means operable when the destination extension telephone has been determined to be the at least one key telephone by the destination determination means, the first means adapted to transmit, to the destination extension telephone, originator identification data corresponding to the originator identification signal detected by the originator detection means, then to cause the destination extension telephone to display the originator identification data, and to transmit an incoming call signal to the destination extension telephone upon or after detection of the (k+1)-th ringing signal by the ringing signal detection means, thereby informing a user of the destination extension telephone of an incoming call, and
• second means operable when the destination extension telephone has been determined to be the at least one standard telephone by the destination determination means, the second means responding to detection of the k-th ringing signal by the ringing signal detection means by transmitting an incoming call signal to the destination extension telephone and thus informing the user of the destination extension telephone of the incoming call.