A telephony communications system for detecting abuse in a public telephone network to which a telephone network subscriber is connected, comprising: a telephone system server which forms a telephone system honey pot and which is configured to emulate an extension subscriber of a telephone system in the public telephone network with an extension number and a password in order to simulate the existence of the emulated extension subscriber of the telephone system vis-à-vis an attacking entity; wherein the telephone system server is configured to receive a control command from the attacking entity to establish a telephone connection between the emulated extension subscriber and the telephone network subscriber in the public telephone network; wherein the telephone system server is configured to send a connection request to the telephone network subscriber in response to receiving the control command in order to initiate the establishment of the telephone connection between the emulated extension subscriber and the telephone network subscriber, wherein the connection request includes a telephone network address of the telephone network subscriber in the public telephone network; a connection control device which is connected between the telephone system server and the public telephone network, wherein the connection control device is configured to receive the connection request of the telephone system server and to relay said request to the telephone network subscriber in the public telephone network in order to establish the telephone connection; and a telephone network abuse detection device, wherein the telephone system server is configured to transmit the telephone network address of the telephone network subscriber to the telephone network abuse detection device, wherein the telephone network abuse detection device is configured to detect an abuse attempt in the public telephone network on the basis of the transmitted telephone network address of the telephone network subscriber. a telephone system server which forms a telephone system honey pot and which is configured to emulate an extension subscriber of a telephone system in the public telephone network with an extension number and a password in order to simulate the existence of the emulated extension subscriber of the telephone system vis-à-vis an attacking entity; wherein the telephone system server is configured to receive a control command from the attacking entity to establish a telephone connection between the emulated extension subscriber and the telephone network subscriber in the public telephone network; wherein the telephone system server is configured to send a connection request to the telephone network subscriber in response to receiving the control command in order to initiate the establishment of the telephone connection between the emulated extension subscriber and the telephone network subscriber, wherein the connection request includes a telephone network address of the telephone network subscriber in the public telephone network; a connection control device which is connected between the telephone system server and the public telephone network, wherein the connection control device is configured to receive the connection request of the telephone system server and to relay said request to the telephone network subscriber in the public telephone network in order to establish the telephone connection; and a telephone network abuse detection device, wherein the telephone system server is configured to transmit the telephone network address of the telephone network subscriber to the telephone network abuse detection device, wherein the telephone network abuse detection device is configured to detect an abuse attempt in the public telephone network on the basis of the transmitted telephone network address of the telephone network subscriber.