GB2249456A - Automatic telephone ringing judgment control - Google Patents
Automatic telephone ringing judgment control Download PDFInfo
- Publication number
- GB2249456A GB2249456A GB9112151A GB9112151A GB2249456A GB 2249456 A GB2249456 A GB 2249456A GB 9112151 A GB9112151 A GB 9112151A GB 9112151 A GB9112151 A GB 9112151A GB 2249456 A GB2249456 A GB 2249456A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ringing
- circuit
- judgment
- inverter
- telephone
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
- H04N1/32704—Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
- H04N1/32706—Type of the other apparatus
- H04N1/32708—Telephone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/71—Substation extension arrangements
- H04M1/715—Substation extension arrangements using two or more extensions per line
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/82—Line monitoring circuits for call progress or status discrimination
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/007—Telephonic communication systems specially adapted for combination with other electrical systems with remote control systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
- H04N1/32704—Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
- H04N1/32704—Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
- H04N1/32706—Type of the other apparatus
- H04N1/3271—Telephone answering machine
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/327—Initiating, continuing or ending a single-mode communication; Handshaking therefor
- H04N1/32704—Establishing a communication with one of a facsimile and another telecommunication apparatus sharing a single line
- H04N1/32715—Detecting
- H04N1/32717—Detecting a calling tone, e.g. CI
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/02—Calling substations, e.g. by ringing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
Abstract
An automatic telephone ringing judgment control includes a phone call signal detector circuit, a master control circuit and a ringing judgment circuit (I, II), the phone call signal detector circuit intercepts a ringing signal from a telephone line on a private communication circuit and alters it to yield a ringing time signal for successive circuits, while the ringing judgment circuit (I, II) interprets the time sequence of different ringing signals and determines which of several communication devices e.g. telephone, facsimile, answering machine is to be connected. The master control circuit provides the power supply and indicator control and resets the system. As a whole, the automatic telephone ringing judgment control automatically detects telephone ringing signals and transfers them to the appropriate communication device. This automatic channelling is done without answering the call, so that communication efficiency is enhanced. Receiving functions of unwanted communication devices may be cut off to safeguard privacy. <IMAGE>
Description
AUTOMATIC TELEPHONE RINGING JUDGMENT CONTROL
This invention can be used beneficially together with many. different communication devices including, for example, telephones, facsimile sets, auxiliary telephone sets, digital facsimile sets, and automatic answering machines. The phone call signal detector circuit, which vorks automatically, is used to detect the incoming ringing signal, and than to select the appropriate signal by which to access the chosen
communication device, thus linking several cormunicatwcn devices to a single line of transmission.
In addition, one may exercise the privacy option, which prevents the stand by unit from receiving additional calls, and thus enjoy confidential communication fee of unwantad interference.
In the past, as the number of communication devices used by a particular telephone subscriber has increased, a corresponding increase in the number of transmiss~on lines has been required to handle tbe various communication needs of these devices. Although a number of line-sharing devices aimed at improving this situation have been introduced recently, almost all such devices provide for phantom ringbacks to callers after calls have been intercepted and answered by one of various communication devices.In addition to the delays and confusion caused to callers by such phantom ringbacks, these line-sharing devices also incur unnecessary toll charges as they answer all incoming calls, regardless of Whether there is anybody at home.
In light of the shortcomings cited in the previous
paragraph, tho inventor hereby introduces an automatic telephone ringing signal detector circuit which, together with the ringing judgment circuit provided, channels incoming ringing signals to the appropriate cozmunication device in the system while preventing any ringing signals from being fed intc-other co=aunication devices in the same system Because this is accomplished quickly, efficiently, and without answering the calls, the nuisances associated with prior models of the system are eradicated.
Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiment with reference to the accompanying drawings, of which:
Figure 1 is a block diagram of the invention; and
Figure 2 is a schematic circuit diagram of the invention.
As seen in Figure 1, a polarity switch (SW1), completes the conducting circuit when necessary. (sal) is also connected to the ringing signal detector, the
ringing signal resetting system, and to two sets of ringing signal judgment circuits. (SW2) is an optional ringing signal output switch whose output can be made to vary with the length of the ringing signal.Each of the two sets of ringing signal judgment circuits is also connected to an in-use and ringing indicator circuit, on which are mounted two luminant diodss
(LED1, LED2) that indicate which set of judgment circuits is presently active in conduction. (SW1) also interconnects with a privacy talk circuit which works together with the controlling master telephone set and the stand by set via ON/OFF switching to prevent the
stand by unit from receiving communication when the main unit is engaged.
Referring to Figure 2, the preferred embodiment comprises a ringing signal detactor circuit (1), a master control circuit (2), ringing signal judgment circuits (31, 32), and a privacy talk circuit (4). The ringing signal detector circuit (1) comprises an inverter IC (referenced as 40106), an RC filter, an 2uD voltage stabilizer circuit, and an RCD rectifier circuit. Resistor (R4) of the RCD rectifier circuit is connected in series to capacitor (C2), which in turn is connected, along with a parallel circuit forayed by a diode (ZD4) and a resistor (R8), to the input end of an inverter (U2A).Resistor (R4) is also connected to a resistor (R2) which connect is connected, along with a parallel circuit formed by a resistor (R3) and a diode (ZD3), to the gate of a FED (Q5). The output end of the inverter (U2A) is connected to the input end of an inverter (U2D) via a resistor (R9). The output end of the inverter (U2D) is connected to the input end of an inverter (U2B) via a resistor (R16). A capacitor (C7) is connected across the input end of the inverter
(U2B). The output end of the inverter (U2B) is connected with the clock input (CR) of a counter (U1B).
The output end of the inverter (U2D) is also connected to the input end of an inverter (U2C). The output end of inverter (U2C) is connected to the clock input (CX)
of a counter (U1A). The output end of the inverter
(U2A) is also connected, through the resistor (R9), with the input end of an inverter (U2F). The output end of the inverter (U2F) is connected to a parallel circuit which comprises a resistor (R11) and a series
circuit formed by a diode (D7) and a resistor (R12).
This parallel circuit is connected to the input end o! an inverter (U2R). The output end of the inverter (U2E) is connected to the reset ends of counters (UlA) and
(U1B) via diodes (D9) and (D10). Pin 14 of inverter
(U2B) is connected to the power source (V+), while pin 7 thereof is grounded.
The ringing signal detector circuits (31, 32) act together with a duplex synchronous counter IC (denoted as (U1A), (U1B) and referenced as 4520), an inverter IC
[denoted as (U3) and referenced as 401063, and an RCD square-wave circuit. The ENABLE end of counter (UlA) is grounded while the state "1" end (pin 3) thereof is connected to a capacitor (C3). The capacitor (CS) is connect@d in series to a diode (D13), which is in turn connected to the RESET (II) end (pin 15) of the counter (U1B). The negative end of the capacitor (CS) is
connected to the cathode of a diode (D14) and to the input end of an inverter (U:E). The anode of the diode (D14) is grounded.The output end of the invertar (U3E) is connected to a resistor (R23). The anode of a diode (D15) is connected to the input end of an inverter
(U3C). The output end oE the inverter (U3C) is connected with terminal (a) of the ringing signal output option switch (SW2). The state "2" output end (pin 4) of counter (U1A) is connected to the input end of an inverter (U3F). The output end of the inverter
(U3F) is connected to a resistor (R25). The anode or a diode (D16) is connected to the input end of the inverter (U3C). Pin 14 of the inverter (U3F) is connected to the power source (V+) while pin 7 thereof is grounded. Both the ENABLE end of the counter (U1B)
and the power outlet (VG3) (pin 8) are grounded. The state "1" output end (pin 11) of counter (U13) is connected, via a dicde (D18) and a capacitor (C17), to the input end of an inverter (U3D). The output end of the inverter (U3D) is connected to the input end of an
inverter (U3B) via the parallel combination of a resistor (R32) and the serial combination of a resistor (R31) and a diode (D20). One end of a capacitor (C13)
is also connected to the input end of the inverter
(U3B). The output end of the inverter (U3B) is connected to terminal (b) of the ringing signal output
cption switch (SW2). The negative and of the capacitor
(C13) is grounded. The state "2" output end (pin 12) of counter (U1B) is connected to the positive end of a
capacitor (C17) via a resistor (R29).The state "4"
output end (pin 13) of the counter (U13) is connected
to the input end of an inverter (UiA) via a resistor
(R28). The output end of the inverter (U3A) is connected to the input end of be inverter (U3B) via a
resistor (R33) and a diode (D22).
The privacy talk circuit (4) ccopr ses an SCR. a
resistor, a capacitor and a diode The gate end of FET
(Q5) is connected to the power tarminal (C), while the
source end thereof is connected to the base of a
transistor (g2) via a resistor (RS) The emitter of the
transistor (Q2) | is connected to the collector of a
transistor r (Q3), which is also connected to terminal (D) - The anode of a luminant diode (LED1) is connected to power terminal (c), while the cathode of the diode
(LED1) is connected to the emitter of transistor (Q3).
The anode of a luminant diode (LED2) is connected to the power terminal (c), , while the cathode of the same is connected tcr the emitter of a transistor (Q4). The
base of transistor (Q4) is connected via a resistor (R7) to the collector of transistor (Q2). The cathode of a diode (D4) is connected to the base of transistor (Q3), while the anode of the same is connected to the output end of the inverter (U3B). The cathode of a diode (D5) is connected to the base of transistor (Q4),
while the anode of the same is connected to the output end of the inverter (U3C). The privacy talc circuit 4 is of a conventional construction and will not be detailed herein.
Once a ringing signal pulse has been picked up as
input by the polarity switch (SWl), an oscillatory signal is generated via the RC circuit. The signal is truncated by the RD circuit, fed to the input end of the inverter (82A), buffered by the inverter (U2D), then processed by inverters (U2C) and (U2B), and fed to
counters (U1A) and (U1B) having synchronized clock pulse inputs. The output end of the inverter (U2A), which is connected to the inverter (U2F), is connected via the inverter (U2E) to the reset terminals of counters (U1A) and (UlB).The counters (UlA) and (U1B),
upon receiving the signal pulse, will start counting for about two seconds, after which a negative pulse lasting approximately 0.8 seconds will be sent to the
RSI terminal of counter (UlA). The counter (UlA) will thus be reset. Meanwhile, the state "1" output end and
the state "2" output end will release a signal to the inverter (UC), concurrent with the pulse input to the clock input of the counter (UlB). About four seconds after the counter (U1B) starts counting, a negative pulse of a duration of approximately 0.4 seconds will be sent to the reset terminal (II), thereby resetting counter (UlB).The state "it', "2", and "4" output ends will send signals via the inverters and and (U3D), which are connected to the inverter (U3B). At this point, the systam is able to check whether the incoming ringing signal frequency corresponds to that of the pre-set comunication channel which was selected with the ringing signal option switch (SW2).
Application of this automatic ringing signal detector circuit to the transmission lines of a telephone, facsimile or other communication devices
achieves automatic detection and timely link-up of communication devices with substantial savings in time together with the cutting-off of the receiving functions of all other communication facilities when unwanted. Thus, private talk is safeguarded from intervention during the entire course of communicatåon.
Claims (3)
1. An automatic telephone ringing judgment control comprising:
a ringing signal detector circuit having S wave
detection, filter, and voltage stabilization and pulse oscillation components such that its output corresponds to the instantaneous waveform of the incoming signal;
a master control circuit including reset devices of a control system, telephone link-up lines and communication facilities;;
a ringing signal judgment circuit serving to verity the time-sequence of the incoming ringing in order to pick-up the intended output, said ringing signal judgment circuit having two determinant circuits, and
being characterized by two sets of detector circuit output signals, which together with the RCD phase, RC delay circuit and inverter deliver output to the ringing signal option switch so as to activate the chosen communication device in prompt and faultless manner which also ensures confidentfality; and
a private communication circuit.
2. The automatic telephone ringing judgment control according to claim 1, wherein said ringing signal judgment circuit comprises a duplex binary synchronous counter, and an IC having six inverters and four sets of RCD circuits
3. The automatic telephone ringing judgment control as substantially described hereinbefore with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US53611190A | 1990-06-08 | 1990-06-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9112151D0 GB9112151D0 (en) | 1991-07-24 |
| GB2249456A true GB2249456A (en) | 1992-05-06 |
Family
ID=24137196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9112151A Withdrawn GB2249456A (en) | 1990-06-08 | 1991-06-06 | Automatic telephone ringing judgment control |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2249456A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286092A (en) * | 1994-01-31 | 1995-08-02 | Sdx Business Systems Limited | Telephone communications switch system and apparatus |
| FR2754414A1 (en) * | 1996-10-07 | 1998-04-10 | Ascom Horlogerie Photographie | Ringing tone discriminator for automatic telephone line terminal switching |
| GB2341039A (en) * | 1998-08-24 | 2000-03-01 | John David Brownlie | Automatic answering for some telephone-network calls |
| EP1137243A1 (en) * | 1993-09-01 | 2001-09-26 | Canon Kabushiki Kaisha | Communication apparatus connectable to switching network providing distinctive ringing pattern service |
-
1991
- 1991-06-06 GB GB9112151A patent/GB2249456A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1137243A1 (en) * | 1993-09-01 | 2001-09-26 | Canon Kabushiki Kaisha | Communication apparatus connectable to switching network providing distinctive ringing pattern service |
| GB2286092A (en) * | 1994-01-31 | 1995-08-02 | Sdx Business Systems Limited | Telephone communications switch system and apparatus |
| FR2754414A1 (en) * | 1996-10-07 | 1998-04-10 | Ascom Horlogerie Photographie | Ringing tone discriminator for automatic telephone line terminal switching |
| GB2341039A (en) * | 1998-08-24 | 2000-03-01 | John David Brownlie | Automatic answering for some telephone-network calls |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9112151D0 (en) | 1991-07-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |