MXPA96002601A - Identifier of telephone calls for encentral use with double signalization formats - Google Patents

Abstract

The present invention relates to a telephone call identifier (ID) that allows to see the telephone number of the subscriber before answering the telephone, for use in exchanges with double signaling (FSK) formats by frequency shift, or (DTMF) ) double multi-line tone of the telephone line to receive and decode signals transmitted to the telephone subscriber's lines, said central lines comprise a first line and a second line, the identifier being characterized by: a microcontroller unit (MCU) for processing data and providing output signals, a non-volatile memory connected to said microcontroller for storing data and programs, said MCU has a format selector to determine if caller ID signals are to be transmitted in FSKóDTMF formats, an FSK demodulator to demodulate said call identifier signals in FSK format transmitted through the first line and the second line, said format selector is connected to the FSK demodulator and provides an activation signal of FSK, said format selector being the one that determines the calling subscriber ID format of FSK and provides the activation signal of FSK, includes a call start current detector and a duration meter, and if both are within predetermined values, it chooses the call identifier format in FSK and provides the FSK activation signal to said FSK demodulator the microcontroller connected to the FSK demodulator through a first FSK activation line where said FSK activation signal is transmitted through where said FSK activation signal is transmitted, a first data connection between the FSK demodulator and said microcontroller to provide data from the FSK demodulator in the microcontroller; a DTMF receiver to decode tones either from the microtel phon or the first line and the second line, said microcontroller is connected to the DTMF receiver through a second activation line, such activation line offers a communication path for a DTMF activation signal, said format selector that determines the call identifier format in DTMF and providing the DTMF activation signal includes the selector containing a polarity detection circuit connected to the microcontroller to detect a change in polarity and to provide a polarity change signal to said microcontroller , the polarity change signal is a DTMF activation signal, a hang-up condition detector for determining the state of the handset and for providing a hang-up signal to said microcontroller, a second data connection is provided between the DTMF receiver and the nanocontroller to provide data from the DTMF receiver in said microc Ontroller, and a keyboard to provide input to the microcontroller, said keyboard has at least one line of connection with the microcontroller, an LCD-type screen, an LCD driver circuit, said screen is connected to the driver circuit, LCD driver circuit is connected to the microcontroller, and where the display shows caller ID information of at least the calling subscriber telephone number for telephone exchanges employing either the FSK caller ID format or in DT format

Description

DUAL TELEPHONE CALL IDENTIFICATION EQUIPMENT BACKGROUND OF THE INVENTION The dual call identification equipment of the present invention is a terminal electronic device that meets the specifications of the telephone company for the Caller User identification service.

Different systems of devices for identification of telephone calls are known in the art, for example in the North American patents No. 5377260 relates to; A telephone system that includes a modem coupled to a processor and a data access array to detect the "caller-ID". With the detected information of the "caller-ID" a specific action is taken; in the U.S. No. 5351289 describes an apparatus for automatically controlling the "ring" signal of an incoming signal generated by the telephone company to a communication equipment (telephone) by means of an electronic interrupting device in series with the telephone line. Based on the detected information of the "caller-ID", it is decided whether or not the "ring" signal is passed to the telephone or communication equipment; No.5341411 a is indicated; System to block the caller's information so that the "Caller" ID does not register it. "The caller who does not want to send their identification data, sends a previous code to the number where they wish to call, and with this code the central one inhibits the identification information. In this way the "caller" does not receive identifying information from the "caller", and knowing that the "caller" has not wanted to identify himself, he can accept or reject the call; in the U.S. No. 5315650 is also described a: System that when detecting the "ring" signal prevents the phone from sending any information during a "T" time so that if it is presented - in the line information of the "caller-ID", it can be be received more easily, in US No. 5289542 it is related to a: Call identification telephone service that maintains the privacy of the originating station ("caller") and provides useful information to the "call" through encrypting the information - tion, in US 5274699 it refers to a type of information deployment source, then it establishes communication with another equipment (receiver) and sends information about the source - of the selected information display. more appropriately identified, in US Pat No. 5265145 it is protected: A telephone with "caller-ID" capability that also has the ability to give the information shown on a display, spell It also has other functions such as: taking certain actions when identifying a certain "caller" or even communicating through an infrared light link with other equipment to exchange information: in the U.S. Pat. No. 5263084 describes a system whereby a first person involved talking to a second receives information from a third party who wishes to speak with him. The first one, knowing who is the third party involved, decides whether he accepts or rejects the call.

As can be seen, the US patents indicated only mention the ability to identify the "caller" but not as the main feature of the invention. Therefore, no patent claiming the call identification function as a characteristic of its invention has been found, which is one of the objects of the present invention In the U.S. Pat. No. 5467385, a registration system and on-screen call number is described, where call identification information is stored, includes a telephone call number when a personal call is not presene and call identification information records. by pan-talla (CID) verbally and then repeated. The system integrates the user's own telephone equipment with CID information, placed on a telephone carrier by the Central Office team. A personal call terminal signal is used as a disconnector to disconnect an answering device from a telephone line and place the decoded CID information. , which is processed by logical control at the end of any message left by the caller.

Although this invention does include a call identification record, this equipment is related to an answering machine and an assembly system, which is not the subject of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1. Diagram of the basic connection system of the dual call identification equipment.

Fig. 2 and 3 Block diagram of the system for connecting the identifier of calls to lines, telephones and their components.

Fig. 4 and 4 'Operational flow diagram of the identifier.

Fig. 5 Signaling format in FSK Fig. 6 Signaling format in DTMI Fig. 1a. Corresponds to an isometric view in vertical successive formation of sections I to IV that make up the electronic dual call identification equipment. Fig. 1b. Isometric view Fig. 1a without tablet II Fig. 2a. Corresponds to an isometric view on the lower floor of the upper sections I of FIG. 1a.

Fig. 3a. Corresponds to an isometric view on the lower floor of the upper sections I of FIG. 1a.

Fig 4a. Corresponds to a lower floor view of section III.

Fig. 5a. Corresponds to a side view of the backrest of the dual equipment of FIG. 1a.

The invention described according to the drawings of Figures 1 and 6. 1a - 5a, in order to define -best the same but of course without limiting its scope..

DETAILED DESCRIPTION OF THE INVENTION In figure 1, a basic connection diagram of the caller ID (B) the telephone (A) and the telephone line (C) is presented. In figures 2 and 3, a diagram is presented in which the connection of the caller ID (B) to the telephone line and its internal components of the equipment is shown.

The operation of the identifier? E calls is explained to. mode a flowchart in Figure 4 and 4 'can see the relationship between each of the parts of the equipment depending on - the signal is received, in FSK fig. 5 or DTMF fig. 6 To explain in detail the operation of the caller ID (B), the signaling formats of figures 5 and 6 will be taken as a basis. In figure 5 you can see the signaling format in FSK used by Tel's telephone exchanges, ex, in which the following is presented: a- A line voltage of + 48 Vdc to hanged handset (20) b- A call start current (I) of 90-110 Vac and a duration of 200 to 400 ms (II). c- From the second call current (IV), they will be presented with a duration of 2 sec. (IV) and a voltage of 90 - 110vac. d- The off-hook handset condition (21) with a line voltage between 6 and 7 Vdc. e- The transmitted information or data (22) is presented at least 500ms (II) after the call start current. f- The duration between call currents is 4 sec (III).

Figure 6 shows the signaling format in DTMF, which is also used by Telmex telephone exchanges and consists of the following: a- A line voltage of +48 Vdc (30) with handset hung, b- A line voltage of -48 Vdc (31) which is presented before sending the information or data (VII) so that the - change of polarity on the telephone line (C). c- The call currents (VIII) with a voltage of 90 - 11 Oac and a duration of 2 sec. d- The transmitted information or data (VII) that appears after the polarity change (VI). e- The off-hook handset condition (32) with a voltage between 6 and 7 Vdc.

In the operation of the caller ID (B), one of the two signaling formats mentioned can be presented - previously, depending on the telephone exchange to which it is connected.

The caller ID (B) is able to detect both and has automatically enabled the reception of any of them as necessary.

The purpose of the caller ID (B) is to detect the identification information of the calling user, in order to display it on the screen (15) Fig.3 of the equipment. In order for the unit to operate, it must be able to detect the call start current (I), fig. 5 reverse polarity (VI), the state of hook (20) and hook (21) of the handset (A) in order to process information and give the ID service - calls.

The basic operation of the call identifier (B) can be described generally or with the help of the flow diagram of Figure 4, where the logic that follows the program of the microcontroller (11) used in the equipment is presented.

When you turn on the caller ID (B) it is initialized first (40) fig. 4 to be ready to receive information through the telephone line (C), as well as the initialization of the screen driver (41) which is responsible for transferring the information of the microcontroller (11) to the LCD screen (15). ), at this time, the date, time information and product information is presented. After this, the caller ID (B) is ready to receive the messages and give this information to the user.

In case of a call arriving in FSK format, the caller ID (B) checks if a start-call current (42) was presented. If so, measure its duration and then verify if it is between the 200 to 400 ms range. If it is valid, - activate the FSK receiver (45) to receive the information - requested by the telephone line (46). This information is decoded to later be stored and displayed on the screen (15). If the previous call start current was not valid, the caller ID returns to wait for a new call current; if it does not appear, go to check if there is a change of polarity (43) on the telephone line (C). If the change in polarity is displayed, the DTMF receiver (49) is activated to be ready to receive the information.

When the information arrives in DTMF it is received and decoded (50) in order to be stored and displayed on the screen of the call identifier (B), then again a new call current will be expected, another polarity change, Czech yes-the handset was picked up (A), or check if button 1 (56) is being pressed.

If an off-hook (52) of the microphone (A) is detected, the caller identifies the message of -cortesy (53) and puts it on hold to display (54) on the screen the numbers that are dialed in. the handset (A), at the end of dialing the number will check if the handset (A) is hung (55), if it was hung, a new call current (42) will be checked, a polarity change (48), an off-hook on the handset (52), but if the handset (55) has not been hung, the message list (57) is consulted and / or deleted. If a button was not pressed and if a time of 30 seconds has not elapsed (58), the caller ID (B) will again check the points (42), (48), (52), (55) . If the latter is affirmative, you go to consult the list of messages. If none of the above options is present, in 30 seconds (58), fig. 41, the caller ID will go into idle mode (59) presenting only the date, time and number of new calls on the screen.

The caller identifier (B) will remain in the inactive state (59) until "any of the following conditions occur:" A call start current (60), a polarity reversal (62), that the handset (A) is off-hook (64) or press-button 1 (66) When any of them is presented, the call identifier (B) will go into active mode and will be put into operation again.

Description of the Blocks and Signals Fig. 2.

DTMF receiver; Circuit that decodes a DTMF (Dual Tone Multi Frequency, Dual Multifunction Tone) signal from the telephone line and converts it to a binary number. 3.58 MHz Oscillator: Circuit that uses a ceramic resonator to produce a constant frequency signal that uses the FSK Demodulator.

FSK Demodulator / Call Current Detector: A circuit that demodulates a FSK signal (FrequencY Shift Keying, Frequency Shift Key). It also detects the call start current (signal that sounds the telephone's bell tower) present on the telephone line.Polarity Investment Detector: Circuit that detects the change in polarity between signals A and B of the telephone line.

Hanging and Hanging Detector: Circuit that detects when the microtéphone is off-hook or lifted and when it is hung again. 32.768 KHz Oscillator: Circuit that uses a quartz crystal to produce a signal with constant frequency. This 2 signal is used as the basis of the reil time clock. 7. - 3.58 MHz Oscillator: Circuit that uses a ceramic resonator to produce a signal with constant frequency. This oscillator provides clock signal to the MCU and the DTMF Receiver. 8. - Battery: This circuit allows the unit to be boosted with a 9V DC battery. 9. - DC adapter: This circuit allows the unit to be powered by a 9V DC battery eliminator connected to the commercial power grid.

. - Voltage Regulator + 5V / Low Battery Detector: Circuit that produces a constant voltage of + 5V to feed the electronic circuit of the unit, protecting it from variations in the supply voltage. It also detects when the battery voltage is very close to the minimum level required for proper operation of the unit. 1. -MCU: Circuit that receives, processes and makes decisions based on the information received from the peripheral circuits - - (DTMF receiver, FSK decoder, memory, etc.). It takes care of all the operation logic of the unit, - as well as displaying the information on the screen. 12. Non-Volatile Memory: Circuit that stores the information received from the telephone exchange by the MCU even without any power source for at least 50 years. The total storage capacity is 60 numbers in single FSK or DTMF format, or 30 numbers in multiple FSK format. 13. -Teclado: Switches that serve as an interface with the user so that he can access or erase the information registered by the unit and is also used to put in the clock the time and date that the user wants. 14. -LLC Manager: Circuit that generates the necessary signals for the handling of an LCD screen (Liquid Crystal Display, Liquid Crystal Display) and to be able to show in it the information coming from the MCU.

. -LCD: LCD screen used to show the user the information registered by the unit. 16. -Filter RF: Circuit that reduces the interference in the telephone line caused by radio frequency signals, mainly AM (Amplitude Modulated) signals 17.-Telephone Line: It is the access to the PÚbljL ca phone network through a pair of cables (A and B) that are connected to the telephone set.

The telephone line consists of 2 cables called A and B (17) Fig. 3. These are connected directly to the circuitry of the device (B) through a Radio Frequency filter (16), which eliminates any induced interference and / or conducted on the telephone line.

The DTMF Receiver (1) is normally in the idle mode until the microcontroller (11) receives the polarity change signal detected by the circuit (4) or by detecting the off-hook of the handset (A) through the circuit (5). Once any of these two signals is received, it activates the DTMF Receiver (1) by means of the ACTIVATION line. Once activated, the receiver decodes the tones sent either by the telephone exchange or by the same handset (A). Each time it receives a tone with the valid frequency and duration, it notifies the microcontroller (11) through the line of VALID TONE that is prepared to receive the information. Then the microcontroller has the line of: ENABLE OUTPUTS and the receiver sends the corresponding number in binary to the microcontroller (11) by means of the data lines.

Constant clock signal for its operation. Likewise, this oscillator (7) provides the same signal to the DTMF Receiver (1) so that it can decode correctly. The microcontroller (11) has also implemented a real time clock based on an ascending order of 32,766 Khz (6) for updating the fippto.; 0 The whole circuit is powered through a 9V DC battery (8) or a battery eliminator (9), which pass through a regulator circuit (10) that offers a constant output of + 5V DC and protects the circuit from variations in the supply voltage. It also has a low battery detector which warns the MCU (11) that the battery voltage is very close to the minimum level required for the unit to function properly.

The way the user communicates with the device is through the keyboard, which consists of 3 switches connected to the MCU and serves to advance or rewind the list of calls as or - to delete one or more calls and adjust the clock - 5 a, b are described below - to the dual identification equipment The dual equipment Fig. La. it is physically integrated by two main shells I and III which are attached to a tablet III of the electronic system with a screw-tight seal and an IV wall support. In the envelope I is located in its upper part to a mica 1, protector of the. { display) screen 12 attached to the cover 2 of the call identifier, likewise A series of three buttons 3, arranged in a row at the ends of said cover 2, is also provided, it also includes zebra-type connectors, the tablet or card 5, of printed circuit also comprises its design. circuitry to zebra connectors 13, a jac 7, for the eliminator of batteries, terminals 8, of the battery; 15 the enclosure III corresponds to the base of the identifier 6, calls and in it is housed in a cavity the battery gue - with its corresponding cover 0, battery, also has anti-slip gums 14, a cavity for arming screw - 15 and in turn is coupled by a cavity 16, to place - 20 ßl wall soup 11. At its backup end the dual equipment also includes an X cavity for battery eliminator, a Y and Z cayidad for connection, telephone and phone rosette.

Functional Description 25 The calling user identifier allows you to see the remote number of answering the telephone.

Claims (3)

You will hear functional idols. c The memory is able to store information even without power supply. In addition you can erase the memory by the user of the i T > dentifier When the memory is saturated the number will be erased • Oldest and successively. I saw that the invention is considered a novelty and for I 1 & > both the content is claimed in the following: R E I V I N D I C A C I O N S »< * * l V.- A dual telephone call identification system, - '15 which allows to see the telephone number before answering the telephone, with memory retention of up to 30 calls, which can - receive and display the digital information transmitted to the subscriber from the telephone exchange by asynchronous data modulation FSK to 1200 baud or by coding the 16 pairs of fre 20 sciences standard double-tone DTMF multifrequensial, characterized in that it comprises an articulated unitary module and an electronic system designed for intelligent equipment that connects to a user's telephone line and that when it receives a * 6 1? Beloved phone presents through a glass screen ,? To 25 liquid the information of the telephone number of the caller. Being said module integrated by two main envelopes • upper * lower ß that are hermetically coupled to one - 1 jO i vJ H 1 «*? \ { printed circuit board, also comprising a screen and keyboard buttons for handling; and where the electronic system is designed for connection to the telephone line and its internal components by the elements of: DTMF receiver; circuit that decodes a multi-line double-tone signal from the telephone line and converts it to a binary number, oscillates
1. 3.58 MHz 10, circuit that uses a ceramic resonator to produce a signal with constant frequency using the FSK demodulator, FSK demodulator, call current detector: circuit that modulates a signal, key by frequency shift, polarity reversal detector: circuit that detects 1S the change in the polarity between signals A and B of the telephone line, hanging and off-hook detector: circuit that detects when the handset is off-hook or lifted and when it is hung again, oscillator of 32.768 KHz: circuit that uses a quartz crystal to produce a signal with constant frequency 20 3.58 MHz oscillator: circuit that uses a ceramic resonator to produce a signal with constant frequency, battery: 9V DC DC adapter: feeder with a 9V DC battery eliminator connected to the commercial power grid, t5V voltage regulator / detector low battery, MCU: circuit that receives, processes and 25 ma decisions based on the information received from the peripheral circuits as well as display the information on the screen, memoir iho Volatile: circuit that stores the information received from! I I il i I (!, I -Wl i ti 't (i "^ {.}.' telephone exchange by the MCU, keyboard" >; '<rtti.?' switches, manßja- LCD dot: circuit that generates the necessary signals for the LCD screen, LCD: LCD screen to show the user the information registered by the unit, filter RF: circuit J »» what JÍ ^ d ^ ce * ia telephone line interference caused by radio frequency signals and telephone. 10
2. 2. Uri dual identification equipment telephone calls in accordance with clause 1, wherein the phone line comprises two lines a and B, the which are connected di ectly to the circuitry of the dual equipment B through a radio-frequency filter-1 5, which eliminates any induced interference "I 'c" and /? conducted on the telephone line.
3. 3. A dual telephone call identification system, in accordance with clause 1, characterized in that the receiver of DTMF (1) is normally in idle mode until the -transformer controller (11) receives the polarity change signal detected by the circuit (4) or by the off-hook detection of the mi * t * * 1 > crotelffono (A) through the circuit (5), once received any of these two signals, activates the DTMF receiver (1) by 25 means * of the ACTIVATION line, once activated, the receiver decodes the tones sent either by the telephone exchange or by the same microtelephone (A), each time it receives a tone with the - i i * 1 i • (, < - '* valid frequency and duration will notify the microcontroller (11) through the line of VALID TONE that is prepared to receive the information, for which the microcontroller enables the line,] I < I "1 í n of: ENABLE OUTPUTS and the receiver sends the corresponding binary" "to the microcontroller (11) by means of -" * of data. "'; '* 10 4, A dual telephone call identification equipment, in accordance with clause 1, characterized in that the demodulat d r FBK (3) is normally in idle mode until ex. microcontroller (11) receives a flame start current • i, t I l t 15 df with a duration of between 200 ms. and 400 ms. detected by one of the parts of the same FSK demodulator (3) through the i * i 'I < * > If the duration of the current is valid, the FSK demodulator (3) is activated by means of the ACTIVATION line, to start demodulating the information coming from the line. telephone and sends it serially through the DATA line to the microcontroller (11) for processing and deploying, this demodulator requires a clock signal provided by an oscillator (2) for its operation; Once the information is received, it is processed by the MCU - I * > «I * i 1« «« 25 (11) that is responsible for storing it in the memory (12) using a serial or medium medium of the CLOCK AND DATA lines of the memory, then the information is also displayed in