AU2731799A - Connection interface - Google Patents
Connection interface Download PDFInfo
- Publication number
- AU2731799A AU2731799A AU27317/99A AU2731799A AU2731799A AU 2731799 A AU2731799 A AU 2731799A AU 27317/99 A AU27317/99 A AU 27317/99A AU 2731799 A AU2731799 A AU 2731799A AU 2731799 A AU2731799 A AU 2731799A
- Authority
- AU
- Australia
- Prior art keywords
- extension
- telephone
- line
- concerned
- sending
- 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.)
- Abandoned
Links
Classifications
-
- 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
- H04M1/26—Devices for calling a subscriber
- H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
- H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc
- H04M1/2745—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc using static electronic memories, e.g. chips
- H04M1/27485—Appending a prefix to or inserting a pause into a dialling sequence
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Telephonic Communication Services (AREA)
Description
1 A CONNECTION INTERFACE The present invention relates to a connection interface which can be used in the telephone art. The function of the interface of the invention is to convert 5 an installation with a plurality of telephone extensions connected to a single telephone line into an installation in which it is possible to dial in to a selected telephone extension and to identify an extension from which a call is dialed out. 10 Modern telephone installations, in particular domestic installations, include a number of wall jacks (at least two) connected in parallel to the same telephone line. The principle of operation of an installation of this kind is as follows. When a user in 15 an installation of this kind wishes to initiate a call, he or she picks up the handset (microphone/loudspeaker) of an extension and dials on that extension the number of the user to be contacted. All the extensions of the installation are connected in parallel and once a 20 telephone call with the required user has been set up a conference call can be organized: if they are off-hook, the handsets of the other extensions of the installation receive the signals from the calling party and those from the called party and can participate in the call. A 25 third party is therefore able to intrude into the conversation. When an incoming call is received, the telephone exchange selects the telephone line of the installation, which corresponds to one or more numbers. The exchange 30 then transmits a ringing signal on the selected telephone line (on its two wires). The ringing signal is received by all the telephone extensions of the installation. All of them begin to ring at the same time. Conversation can be initiated from any extension. As soon as a user picks 35 up a handset of an extension, the exchange detects the off-hook condition, stops sending the ringing signal and connects the two parties. As when making an outgoing 2 call, several persons can use the single telephone line of the installation at the same time. Over and above electrical power consumption problems caused by the parallel connection of several telephone 5 extensions to the same telephone line, it is clear that it is not easy to make a selection, i.e. it is not easy to cause one extension to ring rather than another. For example, if one of the extensions of the installation is a facsimile machine, a calling party wishing to send a 10 fax would want it to be possible for only the facsimile machine to respond, and most importantly not to ring the other extensions. In this way, only the facsimile machine would respond. A user would not even be advised of the call. The problem is the same if the calling 15 party wishes to connect to a modem, to transfer data from computer to computer, rather than to a facsimile machine. Likewise, if the installation includes a facsimile machine or a telephone answering machine, there is no way to ensure that only the intended device responds to the 20 call. At present, if a user inadvertently picks up a handset, for example on the first ring, the facsimile machine or the modem is not activated and the fax that should be sent cannot be received. This happens whenever 25 a user of the installation acts clumsily or without thinking. To remedy this type of problem, the ringing signal sent by the telephone exchange can differ according to whether the calling party wishes to reach a first 30 extension, a second extension, or an nth extension of an installation in which all the extensions are connected in parallel to the same telephone line and each has a different number. However, this relies on the ability of users, on hearing the ringing, to discern that the call 35 is intended for one extension rather than another. For example, fast ringing can relate to a first extension (a voice extension) and slow ringing to a second extension 3 (a facsimile machine, a microcomputer connected via a modem, etc.). Because users are not always capable of recognizing the extension concerned from the timing of the ringing, some extensions are provided, as a selling 5 point, with an option enabling them to ring at a low pitch or at a high pitch. However, a user of an extension could change the ringing pattern for fun and that change could then modify the perception of the selected ringing patterns and render the system 10 incomprehensible. Also, selecting between a facsimile machine and a modem requires the intervention of a user, in order to take positive action so that the required device responds. This human intervention is a major constraint in a context where operation should be 15 entirely automatic. Some terminals are capable of forwarding calls to a particular terminal of the installation on recognizing an additional number entered by the calling party once the call has been set up. This therefore requires additional 20 dialing after call set-up, and also that the calling party be aware of this particular function of the called party's installation. US patent 5 485 508 describes a connection interface of the above kind which is inserted between a plurality of telephone terminals and a common 25 telephone line. It includes a router circuit inserted between the telephone line and the telephone terminals to detect a selection signal emitted by means of the DTMF keypad of a calling telephone terminal some time after dialing the number assigned to that line. The selection 30 signal is sent over the telephone line after a call is set up so that it can be routed in the same way as a voice signal on the telephone line. After receiving a ringing signal, the circuit waits for a selection signal. If the circuit detects an expected signal, it connects 35 the line to the terminal corresponding to the detected signal. A symmetrical problem arises if one of the 4 extensions requests outgoing call to be set up: neither the number dialed at that extension (the called number) nor the number assigned to the common line makes it possible to identify exactly which extension requested 5 call set-up. A first object of the invention is to enable precise identification of which extension has requested call set up in order to provide appropriate services to that extension, in particular separate billing. 10 The invention therefore provides a method of identifying an extension, in particular a telephone extension, facsimile machine, telephone answering machine or modem, when a telephone line is shared by a plurality of extensions, the telephone line being common to a 15 plurality of extensions, a main number being associated with the line and respective additional numbers being associated with the various extensions connected to the line, which method consists in sending an identifying signal identifying the extension concerned in addition to 20 a number dialed on the extension concerned: which method is characterized in that, to send an identifying signal, it consists in sending the additional number associated with the extension concerned in a form that enables a local exchange to recognize it as an 25 additional number associated with a line. The invention also provides a connection interface disposed between a telephone line and at least one extension, in particular a telephone extension, facsimile machine, telephone answering machine or modem, the 30 telephone line being common to a plurality of extensions, wherein a main number is associated with the line and respective additional numbers are associated with the various extensions connected to the line, which interface includes means for sending an identifying signal 35 identifying the extension concerned in addition to a number dialed on the extension concerned; which interface is characterized in that the means 5 for sending an identifying signal include means for sending the additional number associated with the extension concerned in a form that enables a local exchange to recognize it as an additional number 5 associated with a line. The invention will be understood better on reading the following description and referring to the accompanying drawings. The drawings are given by way of example only and are not limiting on the invention. In 10 the drawings: Figure 1 is a diagrammatic representation of a connection interface of the invention, Figure 2 is a more detailed representation of the interface shown in Figure 1, and 15 Figures 3 and 4 are flowcharts of operations carried out by the interface respectively when sending a call and when receiving a call using a connection interface of the invention. Figure 1 shows a connection interface 1 of the 20 invention. The interface 1 is inserted between a telephone extension 2 and a telephone line 3. The interface 1 essentially comprises a router circuit 4 connected to the telephone line 3 and to a telephone extension 2, a facsimile machine 12, etc. 25 At present it is already possible to assign more than one number to a single subscriber line 3. The line 3 corresponds to a main number NDI which can be associated with additional numbers NDS. If a calling party enters an NDI or an NDS associated with the line, 30 the call is connected through to the two wires of the line 3 corresponding to the installation. In a schematic example, an NDI 02 96 04 94 68 is associated with an NDS 02 96 94 85 84, the former connecting to a telephone extension 2 and the latter to a facsimile machine 12. 35 The caller identification service exists already. In the case of outgoing calls from the installation of the invention, the circuits of the invention identify the 6 terminal from which a call is initiated. That identification thereafter enables the calling extension to be distinguished from all the terminals connected to the telephone line 3. At present, in existing 5 installations, if the terminal does not identify itself, the public telecommunications operator assigns the NDI of the installation as the calling party number, regardless of which extension is used to make the call. In accordance with the invention, and in particular 10 for the purposes of itemized billing, for example, the number of the calling extension (the NDI or an NDS, as appropriate) is sent by the calling extension (and not by the public telecommunications operator). This indicates the distribution of calls. Also, if the number is 15 displayed to the called party, the called party is sure to see the correct calling party number displayed on their screen, because the number is sent at the start of dialing. In accordance with the invention, to identify 20 itself, an extension dialing out from the installation of the invention sends a signal of the *AB*CDE# type in which: - * is an identifier header and # an identifier trailer, 25 - AB is a prefix set by the public telecommunications operator to indicate that it is an NDI/NDS which is to be sent, and - CDE is the NDI/NDS identifier, either in full on 10 digits or a short-code version. 30 In the invention, the identifier is sent automatically. The extension dialing out from the installation of the invention sends its number on the single shared line. In the case of incoming calls to the installation of 35 the invention, a calling party dials a number which corresponds to the installation and is part of the national numbering scheme (for example a ten-digit number 7 in France). In accordance with the invention, the router circuit 4 receives, by way of a selection signal, an NDI signal or an NDS signal sent by the telephone exchange 10 on the telephone line prior to the conventional ringing 5 current bursts. For example, the dialing signal sent by a calling party includes a first (NDS) information group 5 and a second information group 6. The first information group 5 is included in a protocol specific to the invention for 10 outgoing calls from the installation. For example, the additional information relates to an NDS of the calling party which is encapsulated in group 5 of the signal between a header 7 and a trailer 8. For example, the header 7 corresponds to the symbol * and the trailer 8 to 15 the symbol # which are included on all telephone keypads. In the invention, although the calling party number is preferably sent automatically, it can also be simulated by telephone extensions which do not include the circuit of the invention. 20 The header 7 and the trailer 8 are preferably inserted automatically by the calling extension. Group 6 corresponds to the called telephone number. It can be interpreted by the telephone exchange. Information group 5 must be entered beforehand so as not to be lost en 25 route. Telephone exchanges can only recognize a sequence corresponding to a valid destination in the national numbering scheme (depending on the country concerned). They discard other numbers without taking any account of them. Such numbers are not interpreted and in most cases 30 they are not even transmitted. The number dialed is therefore transmitted progressively through the switching centers 9 and 10 of a switched telephone network. The connection between the calling extension and the line is built up progressively and terminates at a terminal 35 station 11. The terminal station 11 is that to which the physical telephone line 3 reaching the called user's 8 premises is connected, and which corresponds to the digit 6. As soon as the station 11 is reached it sends ringing current bursts on the telephone line 3. Depending on the type of subscription held by the called party, the 5 terminal station 11 knows whether or not it should send the calling party identification to the extensions connected to the line 3. In the invention, it is of course necessary for the called party to pay the public telecommunications 10 operator's charge for this facility, as is usually the case to obtain the benefit of caller identification service. If the user subscribes to both services at once, the called party identifier is sent as well, prior to the standard ringing current bursts. The called party 15 will then receive the number 02 96 04 94 68 or the number 02 96 04 85 84, depending on the destination (telephone or facsimile machine) designated by the calling party. The invention uses whichever of the two numbers is received to perform the routing. 20 Consider the example of a calling party wishing to make a telephone call to a telephone extension of the installation of the invention. The calling party is identified in the same way as the telephone terminal of the installation (in this example the telephone of the 25 calling party is associated with the number 02 30 73 84 15: *XY* 84 15#, where XY is a fixed string for the whole of the network). It dials the number of the called party, for example 02 96 04 94 68. The local exchange of the calling party recognizes 30 the string and knows that the calling party's number is 02 30 73 84 15. The additional string indicating the NDS (*XY* 84 15#) is not necessarily conveyed by the network. The calling party number conveyed by the network is 2 30 73 84 15 (because the digit 0 is not transmitted). 35 The called party number is 2 96 04 94 68, in the conventional way. Thus if the called party subscribes to the caller identification service, the extension will 9 display the number 2 30 73 84 15 rather than the default number of the installation, corresponding to the NDI. In the invention, because of the encapsulation 7 and 8, the exchanges 9 and 10 and the terminal station 11 can 5 all recognize the special character of the NDI/NDS numbers and forward them. The station 11 sends the identifier of the target device prior to the standard ringing current bursts. The identifier is transmitted via a field transmitted by V.23 modulation, for example, 10 in the same way as the calling party number is already transmitted to the called party for the caller identification service. The called number is received in the circuit 4. The circuit 4 interprets the called number and connects the 15 appropriate telephone extension to the telephone line 3. In the example shown, the installation includes a facsimile machine 12 connected by a line 13 to the interface 4 to which the telephone extension 2 is connected via a line 14. If there is only one extension 20 2, it is not appropriate to speak of "routing". However, the invention does not require two extensions and works even if there is only one. The principle of the invention is to have the interface 4 select the line 13 or 14 at least at the time 25 of ringing. Accordingly, only one of the two lines is connected to the telephone line 3, receives the ringing signal and feeds it to the corresponding units of the connected telephone extension. Once the connected telephone extension has been activated, either manually 30 by a user or automatically in the case of a facsimile machine or a modem, the interface 4 can connect the line 3 to the lines 13 and 14 or alternatively to only one of them. Instead, if the called number conveyed by the line 3 is not understood, i.e. not interpreted by the 35 interface 4, the latter can connect a single default telephone extension 2 or 12 to the line 3, or connect them all, in the old way.
10 Figure 2 shows a practical implementation of the interface 4 and how it is connected to the telephone line 3. A conventional telephone 2 includes a handset 15 with a loudspeaker 16 and a microphone 17. The loudspeaker 5 and the microphone are connected to the line 14. Broadly speaking, a wire 18 of the line 14 is connected to a wire 19 of the line 3 by a switch 20. The switch 20 is operated by a lever 21. When the handset 15 is not off hook, the lever 21 is depressed and the switch 20 10 connects the wire 19 to a ringer 22. The ringing signal on the wire 19 therefore operates the ringer 22 at the appropriate time. If the user picks up the handset 15, the lever 21 rises and the ringer 22 is no longer energized: it stops. Under these conditions the wire 19 15 is connected to the wire 18: the telephone line 14 is connected to the line 3. A keypad 23 is used to generate DTMF type signals to dial a call. Broadly speaking, the signals produced by the circuit 23 are coupled to the wire 19 by a coupler 24. Any other system is feasible, 20 in particular an electrical connection system. The coupler 24 is shown here only to illustrate the function. Figure 2 shows a router circuit 4 associated with the telephone extension 2. The router circuit 4 includes a coupler 25 for receiving a selection signal carried by 25 the line 3. The selection signal is processed by a circuit 26 of the circuit 4 to produce a control signal which is applied to a switch 27 which is symbolized here as a transistor connected in series in the wire 19. The transistor 27 is turned on if the signals 30 detected by the coupler 25 and processed by the circuit 26 correspond to the extension 2. This therefore occurs prior to the ringing signal being sent to the extension 2. In this case the line 14 is connected to the line 3. The circuit 26 can be incorporated into the circuit 23 35 and the coupler 25 replaced by the coupler 24. From a practical point of view, modern telephones already have switches at the appropriate places and a switch of the 11 switch 27 type is therefore already present. It is therefore sufficient to program the circuit 23 to incorporate into it the functions of the circuit 26. The invention is then implemented with no additional 5 hardware. In this case the circuit 4 associated with the extension 2 is in fact incorporated in it. Rather than providing a router circuit 4 (which then routes to only one telephone extension, the one with which it is associated), it may be more appropriate to 10 provide an independent router circuit 28. The circuit 28 can then share the telephone line 3 between several user telephone lines, for example three lines 29, 30 and 31. The lines 29 to 31 are connected to different telephone devices, in the same way as the devices 2 and 12 were 15 connected to the lines 14 and 13 in Figure 1. The circuit 28 includes a coupler 32 and a processor circuit 33. The processor 33 is able to recognize several NDS signals of different types and to operate the switches 34 20 to 36 accordingly to connect the respective lines 29 to 31 to the line 3. The representation of this circuit is somewhat schematic, but shows that an interface according to the invention can include a plurality of ports, e.g. the ports 37 to 39, each of which is connected to a 25 different telephone extension connectable on command, via switches 34 to 36, to the telephone line 3. Instead of this, the lines 29 to 31 can be radio transmission lines assigned separate codes. By way of an enhancement, the circuit 28 further 30 includes a call detector circuit 40. The circuit 40 is connected to the lines 29 to 31 by couplers 41 to 43. If a user picks up a handset 15 of a telephone connected to one of these lines, the line concerned allows a current to flow in order to receive the dial tone from the 35 terminal station 11. The dial tone is detected by one of the couplers 41 to 43, which then activates the circuit 40 so that it sends a prefix representing the identity of 12 the calling telephone extension in addition to the number dialed by the user. The other party can therefore be advised of the NDS or NDI of the calling extension. Of course, the circuit 40 can be incorporated in the 5 circuit 33 and the coupler 32 can be incorporated in the couplers 41-43 and the circuit 28 can be incorporated in each telephone extension 2. The extensions have ports so that they can be connected to other extensions in cascade. 10 Figure 3 shows call set-up in an installation according to the invention. In a first step 44 a user picks up a handset. This is detected by the terminal station 11 in step 45 and causes dial tone to be sent during step 46. If necessary, the dial tone is replaced 15 by a message from the terminal station 11. The message can be an advertising message, for example, or it can provide service information. When the user dials the first digit of the number to be called, during the next step 47, the sending of dial tone by the terminal station 20 11 is normally stopped. In the invention, a prefix corresponding to the identity and location of the extension in the installation which originated the call is sent automatically. If the prefix were to be sent 25 immediately, the terminal station 11 would interpret it as dialing and would automatically cut off the dial tone. To prevent the user, who at this time is holding the handset against an ear, from forming the impression that the line has not been allocated to them by the terminal 30 station 11 (because the dial tone is no longer heard), it is preferable not to send the prefix as soon as the handset is picked up. In order for the prefix to be in the preamble of the dialed number, the first digit of the called number dialed by the calling party is stored in 35 step 48. Once it has been stored, the prefix is sent during step 49, after which the first digit entered and subsequent digits entered are sent during step 50. The 13 dial tone that the terminal station 11 ceases to send on receiving the prefix could be simulated, but this would not be satisfactory in situations where the terminal station 11 sends a recorded message (possibly an 5 advertising message) instead of sending dial tone. It is not possible to simulate a message whose content is unknown. Once it has recognized that the first sequence identifies a terminal, the terminal station 11 could 10 instead send the message or dial tone to the user, as if from the beginning of the call. In this case, the circuit 4 of the invention can send the identification sequence as soon as the off-hook condition is detected. Figure 4 shows what happens in the circuit 4 or the 15 circuit 28 at the receiving end. In step 51, the circuit 26 or 33 detects the presence of a particular NDI or NDS. In step 52 it selects a port 37 to 39 and in step 53 it routes the ringing signal and then data, speech or other information to that port. 20 The invention also provides for managing the rest of the installation when a particular telephone extension has been activated. Thus in step 54 for an outgoing call or step 55 for an incoming call, all the extensions to which the call is not relevant can be deactivated. For 25 example, the switch 27 is under the control of the circuit 33, which can be used to prevent an extension that is not selected from intruding on the line. In this case, the conference call facility is barred. This can of course be optional, as selected by a user according to 30 the chosen configuration of their installation. At the receiving end, the ports can be activated or deactivated in step 56, after step 53. This will be the case in particular if step 55 is used to deactivate the ringer in extensions which are not relevant but other extensions 35 are to be allowed to participate in the conversation (step 56). In this case, deactivation or activation can be subject to a time limit, for example limited to 14 application of the ringing signal.
Claims (12)
1. A connection interface (4) disposed between a telephone line (3) and at least one extension (2), in particular a telephone extension, facsimile machine, 5 telephone answering machine or modem; the telephone line being common to a plurality of extensions (2, 12); a main number being associated with the line, and respective additional numbers being associated with the various extensions connected to that line; the interface 10 including means (40, 41) for sending an identifying signal (5) identifying the extension concerned in addition to a number (6) dialed at the extension (2) concerned; which interface is characterized in that the means (40, 41) for sending an identifying signal (5) 15 include means for sending the additional number associated with the extension concerned in a form (*NDS#) enabling a local exchange to recognize it as an additional number associated with a line.
2. An interface according to claim 1, characterized in 20 that it further includes a router circuit (4) connected to the telephone line and to the extension concerned for: - detecting a selection signal (NDS) sent by a telephone exchange on the telephone line on receiving a call, and preceding a ringing signal, and 25 - connecting the extension concerned to the line if (26) the selection signal corresponds to an expected signal.
3. A router circuit, characterized in that it includes a plurality of interfaces according to claim 1 each 30 adapted to be connected to a different extension.
4. A telephone extension, characterized in that it includes an interface according to claim 1.
5. A facsimile machine, characterized in that it 16 includes an interface according to claim 1.
6. A telephone answering machine, characterized in that it includes an interface according to claim 1.
7. A modem, characterized in that it includes an 5 interface according to claim 1.
8. A telephone exchange, characterized in that it includes means for recognizing an additional number associated with a line when a called party number is dialed at a terminal connected to that line, which 10 additional number is sent on that line in addition to the called party number.
9. A method of identifying an extension (2), in particular a telephone extension, facsimile machine, telephone answering machine or modem, when a telephone 15 line (3) is shared by a plurality of extensions (2, 12), the telephone line being common to a plurality of extensions (2, 12); a main number being associated with the line, and respective additional numbers being associated with the various extensions connected to that 20 line; the method consisting in sending an identifying signal (5) identifying the extension concerned in addition to a number dialed (6) on the extension (2) concerned; which method is characterized in that, to send an identifying signal (5), it consists in sending the 25 additional number associated with the extension concerned in a form (*NDS#) enabling a local exchange to recognize it as an additional number associated with a line.
10. A method according to claim 9, characterized in that it consists of: 30 - storing (48) in a register the first digit of the number dialed at the extension prior to sending the additional number identifying the extension (2) 17 concerned, - sending (50) the stored digit after sending (49) the additional number identifying the extension (2) concerned, and 5 - finally sending (50) all the other digits of the dialed number.
11. A method according to claim 9, characterized in that it further consists of having the exchange send dial tone over the line after the additional number is received to 10 prompt the caller to dial the called party's number.
12. A method according to claim 9, characterized in that it further consists of: - detecting (51) a selection signal sent by a telephone exchange on the telephone line prior to the 15 ringing signal, and then - selecting (52) a telephone extension corresponding to the selection signal.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9803261A FR2776452B1 (en) | 1998-03-17 | 1998-03-17 | CONNECTION INTERFACE |
FR9803261 | 1998-03-17 | ||
PCT/FR1999/000488 WO1999048269A1 (en) | 1998-03-17 | 1999-03-04 | Connection interface |
Publications (1)
Publication Number | Publication Date |
---|---|
AU2731799A true AU2731799A (en) | 1999-10-11 |
Family
ID=9524144
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU27317/99A Abandoned AU2731799A (en) | 1998-03-17 | 1999-03-04 | Connection interface |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0944222A1 (en) |
JP (1) | JP2002507861A (en) |
AU (1) | AU2731799A (en) |
CA (1) | CA2322982A1 (en) |
FR (1) | FR2776452B1 (en) |
WO (1) | WO1999048269A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1156638A1 (en) * | 2000-05-16 | 2001-11-21 | Siemens Aktiengesellschaft | Telephone with call diversion function |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4674115A (en) * | 1985-09-20 | 1987-06-16 | Jabil Circuit Company | Programmable telephone switcher |
FR2631765B1 (en) * | 1988-05-20 | 1990-08-31 | Dolphin Integration Sa | TELEPHONE INTERFACE CIRCUIT |
US5200994A (en) * | 1988-08-12 | 1993-04-06 | Kabushiki Kaisha Toshiba | Communication terminal apparatus and control method with party identification features |
US5056132A (en) * | 1989-07-25 | 1991-10-08 | Intertech Engineering Associates, Inc. | Switch device adapted to interface between an incoming telephone line and an internal telephone system |
US5127045A (en) * | 1989-11-16 | 1992-06-30 | Cragun David R | Identifying telephone controller system |
EP0458540B1 (en) * | 1990-05-21 | 1998-01-28 | Canon Kabushiki Kaisha | Communication apparatus |
PL174557B1 (en) * | 1993-03-05 | 1998-08-31 | At & T Corp | Connection-making device for identification of manager's terminal number at subscriber's office |
US5485508A (en) * | 1993-07-19 | 1996-01-16 | Ho; Geng Kaung | Hybrid communication devices with one telephone line |
-
1998
- 1998-03-17 FR FR9803261A patent/FR2776452B1/en not_active Expired - Fee Related
-
1999
- 1999-03-04 AU AU27317/99A patent/AU2731799A/en not_active Abandoned
- 1999-03-04 WO PCT/FR1999/000488 patent/WO1999048269A1/en active Application Filing
- 1999-03-04 EP EP99400525A patent/EP0944222A1/en not_active Withdrawn
- 1999-03-04 JP JP2000537359A patent/JP2002507861A/en not_active Withdrawn
- 1999-03-04 CA CA002322982A patent/CA2322982A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
JP2002507861A (en) | 2002-03-12 |
CA2322982A1 (en) | 1999-09-23 |
FR2776452B1 (en) | 2000-04-28 |
WO1999048269A1 (en) | 1999-09-23 |
EP0944222A1 (en) | 1999-09-22 |
FR2776452A1 (en) | 1999-09-24 |
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