Abstract:
A technique for controlling a ring volume and selectively receiving messages by facsimile, includes: establishing a personal reception mode; determining if the personal reception mode has been established when a ringing signal comes into a receiving-side facsimile machine; and performing the personal reception mode operations provided it has been established.

Description:
CLAIM OF PRIORITY 
     This application makes claims all benefits accruing under 35 U.S.C. §119 from an application for METHOD OF CONTROLLING RING VOLUME AND SELECTIVELY RECEIVING MESSAGES BY FACSIMILE earlier filed in the Korean Industrial Property Office on 23 Dec. 1995 and there duly assigned Ser. No. 55746/1995. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to a facsimile machine. More particularly, it relates to a technique for controlling a ring volume for incoming calls from transmitters selected by a receiver in advance on establishing a personal reception mode and for selectively receiving facsimile messages. 
     2. Description of the Related Art 
     In line with the remarkable development of telecommunications systems, the demand for various communication services is on the increase, and there are variety of techniques for setting up facsimile connections. 
     According to an earlier method of communication using a facsimile machine, when a facsimile transmitter sends a facsimile signal to a facsimile receiver, a ring signal is sent as is through the telephone lines by the telephone central office. The receiving machine counts the number of ring signals and automatically converts to a reception mode, thereby allowing the reception of documents. 
     Thus, a facsimile receiver may be troubled with unsolicited junk mail (such as advertising circulars) that are sent to the receiver via facsimile. Besides, the earlier facsimile machines are incapable of either emitting ringing signals only when incoming messages from transmitters previously selected by the receiver are received by the receiving machine, or producing ringing signals at a selected volume at midnight in order to keep the machine owners&#39; personal matters and relationships secret. 
     The patents to Gamble, Allen, Groff, Lutz et al., Sanford, and Sabo, U.S. Pat. Nos. 4,409,439, 4,429,188, 4,446,334, 4,791,664, 4,926,470, and 5,127,049, entitled Controllable Telephone Call Annunciator, Telephone Call Screener, Telephone Number Coding Device, System For Selectively Receiving Telephone Calls, Telephone Call Screening Circuit, and Coded Phone Security System respectively, each disclose telephone systems in which a caller must provide an additional code in order for ringing signal to be provided to the called party. 
     The two patents to Yeh, U.S. Pat. Nos. 4,856,056 and 4,644,106, both entitled Apparatus for Timely Controlling The Sound Characteristic Of A Signaling Means Of A Voice Communication Device, each disclose a telephone apparatus in which the loudness of the ringing signal can be programmed. Similarity, the patents to Bell et al. and Oprea, U.S. Pat. Nos. 3,033,941 and 5,323,456, respectively entitled Means For Altering Telephone Operation and Digitally Controlled Ringer Signal Generations, each also disclose programming the ringer loudness. 
     Lastly, the patents to Kuwahara and Campbell et al., U.S. Pat. Nos. 5,337,350 and 5,499,287, respectively entitled Facsimile Apparatus With Telephone System, and Fax-Telephone Interface Circuit, each disclose facsimile machine arrangements in which the incoming call is directed to a facsimile machine upon the detection of the proper code signal or provides a ring signal if the call is determined not to be a facsimile call. 
     It is noted that none of the cited references teaches or suggests the recited combination of the present invention. 
     SUMMARY OF THE INVENTION 
     The present invention is directed to a technique for controlling a ring volume and selectively receiving messages by facsimile which substantially obviates the above-described problems due to limitations and disadvantages of the related art. 
     It is an objective of the present invention to provide a technique for controlling a ring volume for incoming calls from transmitters selected by a receiver on establishing a personal reception mode and for selectively receiving printed messages by facsimile. 
     In order to realize the above object, the present invention discloses a technique for controlling a ring volume and selectively receiving messages by facsimile, including the steps of establishing a personal reception mode; determining if the personal reception mode is established when a ringing signal comes into a receiving-side facsimile machine; and performing the personal reception mode provided it is established. 
     As another aspect of the present invention, there is disclosed a technique for establishing a personal reception mode for controlling a ring volume and selectively receiving messages by facsimile, including the steps of selecting a ring volume when there is a key input for establishing a personal reception mode; and inputting and setting a reception password. 
     As still another aspect of the present invention, there is disclosed a technique for performing a personal reception mode by a facsimile machine, including the steps of determining if an incoming call has been received, on presetting the personal reception mode; receiving a reception password from a transmitter if there is an incoming call, and determining whether or not the reception password and a previously-recorded password correspond; and transmitting a dummy call at a selected volume if the reception password and the previously-recorded password correspond. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     A more complete appreciation of the invention, and many of the attendant advantages thereof, will be readily apparent as the same becomes better understood by reference to the following detailed description when considered in conjunction with the accompanying drawings in which like reference symbols indicate the same or similar components, wherein: 
     FIG. 1 is a block diagram of a facsimile machine in accordance with the present invention; 
     FIG. 2 is a flowchart showing the steps of establishing a personal reception mode in accordance with the present invention; and 
     FIG. 3 is a flowchart showing the steps of managing the execution of the personal reception mode when an incoming call comes into a receiving machine. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Reference will now be made in detail to the preferred embodiment of the present invention, examples of which are illustrated in the accompanying drawings. 
     As shown in FIG. 1, the facsimile machine includes: a central processing unit (CPU) 20 having a read only memory and a random access memory and having control of the overall operation of the facsimile machine according to a predetermined program; a memory 60 in which data may be stored and from which the same data may be retrieved under the control of the CPU 20; a key input unit 10 having a set of keys for feeding information into the facsimile machine; a scanner 50 for converting information on a page into corresponding electrical signals and inputting them to the CPU 20, and a modem (modulator/demodulator) 30, controlled by the CPU 20, for converting an output of the CPU 20 into corresponding analog data, and for converting analog input data into corresponding binary digital data. 
     The facsimile machine also includes a network control unit (NCU) 40, actuated under the control of the CPU 20, for establishing the communications link with a telephone line, and interfacing the modem 30 with the telephone line, and a printer for printing out input data under the control of the CPU 20. 
     FIG. 2 shows the steps of establishing a personal reception mode in accordance with the present invention. The personal reception mode includes a ring volume control mode and a reception password record mode. 
     FIG. 3 shows the steps of managing the execution of the personal reception mode when an incoming call comes into a receiving machine. 
     When an incoming call comes into the receiving machine, a determination is made as to whether or not it is in the personal reception mode. If the personal reception mode has been established, a reception password confirm mode and a ring volume control mode are then carried out. 
     The operation of the present invention will be described in detail with reference to FIGS. 1 to 3. 
     Referring first to FIG. 2, the CPU 20 determines (S200) if there is a key input for establishing a personal reception mode. If there is the key input, the CPU 20 determines (S210) if the ring volume control has been requested. If the ring volume control has been not requested, the CPU 20 sets a previously-selected ring volume, and determines (S240) if there is a recorded reception password. 
     If the ring volume control has been requested, the CPU 20 produces a control signal to a corresponding section to set a ring volume as a user desires. There are off, low and high levels in the ring volume. Subsequently, the CPU 20 determines if there is a recorded reception password. If the CPU 20 determines that there is no recorded password, it records an (S270) input password, and then completes the program. On the contrary, if the CPU 20 determines that there is a recorded password, it detects (S250) whether or not there is a request for a change of the current reception password. If the CPU 20 determines that there is no request for a change of the current password, it completes the program. If the CPU 20 determines that there is such a request, it records (S260) the change of the current password to a new password, and then completes the program. 
     Turning to FIG. 3, the CPU 20 determines (S300) whether or not an incoming call has come into the receiving set. If the CPU 20 has determined that an incoming call has been received, it detects (S310) if a personal reception mode has been established through the memory unit 60. If the CPU 20 determines that the personal reception mode has not been established, it allows (S350) the performance of the already-established mode. If the CPU 20 determines that the personal reception mode has been established, it seizes (S320) the corresponding telephone line and lets the transmitter have an audible confirmation. The CPU 20 then sets (S330) a timer 1 for checking out a password sent from the transmitter. The checking time of the timer 1 is 10 to 20 seconds. 
     Subsequently, the CPU 20 determines (S340) if there is a DTMF code sent by the transmitter using the timer 1. If there is no DTMF code from the transmitter, the CPU 20 determines (S360) whether or not the time measured by the timer 1 is over. If so, the CPU 20 completes the program. If the output does not result therefrom, the CPU 20 returns to the step 340, and again determines if there is a DTMF code sent by the transmitter. 
     If there is a DTMF code from the transmitter, the CPU 20 determines (S370) whether or not the input DTMF code and the current password correspond. The CPU 20 completes the program if the input DTMF code and the current password do not correspond, and it sets (S380) a timer 2. The checking time of the timer 2 is 20 to 30 seconds. 
     Subsequently, the CPU 20 controls (S390) the corresponding section, and transmits a dummy ring to it at a selected volume and sends back a dummy ring-back tone to the transmitter. The CPU 20 then detects if the facsimile&#39;s control circuitry has placed an off-hook condition on the telephone line. If so, the CPU 20 converts (S440) the current mode to a voice communication mode, and if it determines that it does not place an off-hook condition has not occurred, it checks for the generation of a CNG signal. 
     If the generation of the CNG signal is detected, the CPU 20 converts (S430) the current mode to a facsimile mode, and if the CNG signal is not detected, the CPU 20 determines (S420) if the time measured by the timer 2 is over. If so, the CPU 20 completes the program. If the output does not result therefrom, the CPU 20 returns to the step 390, and a dummy ring is transmitted to the corresponding section at a selected volume. 
     The present invention enables a receiving-side facsimile machine to be in a personal reception mode, and has the capability to emit ringing signals only when messages from transmitters selected by a receiver come into the receiving set, or to selectively receive printed messages. Therefore, the present invention may prevent an invasion of a user&#39;s privacy. 
     It should be understood that the present invention is not limited to the particular embodiment disclosed herein as the best mode contemplated for carrying out the present invention, but rather that the present invention is not limited to the specific embodiments described in this specification except as defined in the appended claims.