DEVICE FOR PERMITTING INTERACTION BETWEEN FIXED AND CELLULAR TELEPHONE NETWORKS

Abstract: Electronic system that by connecting a fixed telephone set (105) to a cellular phone (100) permits interaction between the cellular phone network and the fixed telephone (105) and also with the fixed telephone network (20).

Description: Device for permitting interaction between fixed and cellular telephone networks The system of telephone connections by cable among users worldwide is universally known, one that operates through telephone exchanges r or users who select their numbers on instruments by means of a keypad or by mechanical dialling. Increasingly popular however is connection through airborne waves using what are known as cellular telephones operating through area based exchanges with receiving and transmitting antennas. The cellular or mobile phones have many advantages which include their being usable anywhere, being light in weight, of a small size and having no fixed connections. Some concern however is felt about possible negative effects on the human body because of the electromagnetic waves generated or received by cellular phones, it being necessary to hold them close to the mouth and ears and therefore also close to a highly important organ such as the brain. Purpose of the above invention is to permit interaction between the two systems, respectively connected by cable and by air, eliminating at the outset any risk of negative bodily effects from the electromagnetic radiations attributed to cellular phones, and therefore benefiting from the advantages of both systems while avoiding possible disadvantages, as will now be explained. Subject of the invention is an electronic system that permits interaction between the cellular network and that of a fixed telephone by connecting the latter to a cellular phone The cellular phone can be. of any type, of the latest generation or of an earlier one. The fixed telephone can be cordless. Connection between the fixed and the cellular phone can be made by cable, by optic fibres, by infrared rays and by electromagnetic waves. The electromagnetic waves use two antennas, respectively connected by cables to the cellular and fixed telephones. Connection between the cellular phone, fitted with electric contacts, and the fixed telephone can be made by inserting the cellular phone into a seat prepared for it in the fixed telephone which in turn possesses the electric contacts needed for connection to the cellular network. According to the application required of it, the electronic system here described may comprise a suitable type of microprocessor which can be built into the fixed telephone set. One type of microprocessor permits interaction between the cellular network and that of the fixed telephone. This microprocessor comprises an interchange circuit connected both to the lines of the fixed telephone network through circuits such as the interface that galvanically isolates the logic and control parts of the network, that of the protective filter, that of call recognition, that for checking if the line is free, the enabling circuit, as well as the lines from the cellular network through circuits such as filter, amplification, interface, protective filter, call recognition, checking to see if the line is free, and the enabling circuit. The interchange circuit is connected to the fixed telephone set and to a circuit for selecting its outgoing calls. This permits calls to be made and received through the fixed telephone network using the keypad of the fixed set and through the cellular network using the keypad on the cellular phone, and using the handset of the fixed phone, therefore making possible all the functions generally provided for the fixed telephone network and for the cellular network. The microprocessor can be placed in a specific structure comprising three connections: one for connection to the cellular phone network by means of a cellular phone, another for connection to the fixed network and a third for connection to a fixed telephone set. One type of microprocessor permits incoming and outgoing calls to be made with the cellular network using both the keypad and the handset of the fixed telephone. This microprocessor is connected directly to the circuit of electric feed for the telephone line, to the contacts for connectors respectively on the cellular phone and on the telephone line, to the ringing circuit, to the headset's disconnection circuit, to the phonic circuit, to the keypad interface and to the keypad. One type of microprocessor permits incoming and outgoing calls to be made with the cellular network using the handset of the fixed telephone set only. This microprocessor comprises connection to the connector on the cellular phone through the amplifier and filter circuits, through the headset's disconnection circuit, through the phonic circuit and through the feed circuit connectable to a source of electric current. The invention offers evident advantages. Use can be made of two telephone networks, that by cable with the ordinary fixed telephone sets and that through the air with cellular phones. Using the keypad and handset of an ordinary fixed telephone and the cellular network for transmitting signals, all the advantages provided by the latter network can be obtained while avoiding the negative effects it is presumed to have on the human body. The cellular phone can naturally be one of the new generation or of an earlier one. Stated briefly, effective interaction can be made between the fixed telephone and the cellular networks, with the possibility of using all the functions provided for fixed and mobile phones and with all the important operational advantages, allied to those of health. Characteristics and purposes of the invention will be made still clearer by the following examples of its execution illustrated by diagrammatically drawn figures. Fig. 1 Connections between a fixed telephone set and a cellular phone with a microprocessor inside a specific structure, by cable, perspective view. Fig. 2 As above, through the air, perspective view. Fig. 3 Diagram of the microprocessor's electronic connections. Fig. 4 Variant showing the microprocessor built into the fixed telephone set, perspective view. Fig. 5 Variant showing the fixed telephone set with built-in microprocessor, and seat to receive the cellular phone, perspective view. Fig. 6 Cellular phone adapted for insertion into a seat in the fixed telephone, with built-in microprocessor. Fig. 7 Fixed telephone with built-in microprocessor, showing the cellular phone fitted into its seat, perspective view. Fig. 8 Diagram showing electronic connections for the fixed telephone set with built-in microprocessor. Fig. 9 Variant for electric-electronic connection of a fixed telephone to a cellular phone. Fig. 10 As above with the cellular phone fitted into its seat in a fixed telephone. Fig. 11 Diagram showing electric-electronic connections between a cellular phone and a fixed phone. In Figure 1 a specific structure 30 is shown; this houses a micro- processor 31 which permits interchange between the cellular network 25 and that of the fixed telephone 20. This microprocessor is connected to: - the cellular network 25 through the cellular phone 10 by the cable 12 and connectors 11 and 13; - the fixed telephone network 20 by the cable 22 and connectors 21 and 23; - the fixed telephone 70 by the cable 72 and connectors 71 and 73. The different connections can obviously be connected up or cut out as preferred. Connection between the cellular phone 10 and fixed telephone 70 can also be made by optic fibres or through the air as shown in Figure 2. The cellular phone 10 is connected by the connector 80 and cable 81 to the antenna 82. The structure 30 is connected by the connector 85 and cable 86 to an antenna 87. The two antennas 82 and 87 can transmit or receive by electromagnetic waves. Figure 3 shows a diagrammatical layout of the microprocessor 31. Signals from the cellular network 25 reach the interchange circuit 60 between the cellular and fixed telephone networks, passing through the filter 35, the amplifier 36, the interface 38, the filter 39, the circuit 40 for recognising an incoming call, the control circuit 41 and the circuit for enablement 42, and signals from the fixed telephone network 20 through the interface 50, the filter 51 , the circuit 52 for recognition of the free call, and those for control 53 and for enablement 54. This interchange circuit 60 is connected to the circuit 55 that distributes the calls made through the fixed telephone 70. Feed 62 is taken from the telephone line 20. The circuits 38 and 50 interfacing with the telephone line can be photocouplers for isolating the logic and control part from the direct current whose voltage may vary between 48 and 60 volts. The protective filters 39 and 51 are mainly useful since input voltage to the telephone coupling transformer is also present at the output. With its circuits 35-42, 50-54 and 60, the microprocessor 31 makes it possible to use the fixed telephone network 20 by means of the keypad 74 of the fixed telephone 70, and the cellular network by means of the handset 75 of said fixed telephone 70. One improvement also envisages connection of the cellular network to the data line of the fixed telephone network 20. This means that all the functions offered by the fixed 20 and cellular 25 telephone networks can be used either together or separately for both transmission and reception. In one variant the microprocessor 31 is built into the fixed telephone 95, as indicated in Figure 4. The connectors 11 of the cellular phone 10, and 21 of the fixed telephone network 20, fit into slots, respectively 17 and 27, made for them in the fixed telephone 95. In one execution the cellular phone can be plugged into a seat 106 made for it in the fixed telephone 105, as seen in Figures 5-7. In this seat 106 there is a plug 107 with contacts 108. The cellular phone 100 presents a means 102 with electric contacts 101 that match up with the contacts 108 on the fixed telephone 105 when said cellular phone 100 is plugged into the seat 106 (Figure7). Figure 8 shows in diagrammatic form the electric-electronic connections among the different circuits. The microprocessor 31 is connected to: - the telephone network 20 by the connector 27; - the electric feed circuit 62 from the telephone line 20; - the cellular phone 10, 100 by connections 17, 108; - the ringing circuit 63; - the handset disconnection circuit 64; - the phonic circuit 65,66; - the keypad interface 67; - the keypad circuit 74. Figure 9 illustrates the connection between a fixed telephone 120 and the cellular phone network 25 by the cellular phone 10 through the cable 12, connector 13 and connector 11 that fits into a specially provided slot 18 in said fixed telephone 120. Communication can therefore be made with the cellular phone network 25 using both the keypad 74 and the handset 75 of the fixed telephone 120. In Figure 10 the cellular phone 100 is connected to the fixed telephone 120 by inserting it into the functional seat 106. Figure 11 shows a diagram of the main circuits. The slot 18 permits connection with the connector 11 on the cellular phone 10, 100 through the amplifier 125, the filter 126, the handset disconnection circuit 64, the phonic circuit 65,66, the feed circuit 127 that can be joined to a source of electricity by the connector 128. Communication with the cellular phone network 25 can therefore be made using the handset 75 of said fixed telephone 120.

Claims: CLAIMS 1. Electronic system characterized in that it permits interaction between the cellular phone network (25) and a fixed telephone set (70, 95, 105, 120) by connecting this latter to a cellular phone (10, 100). 2. Electronic system as in claim 1 , characterized in that the cellular phone (10) may be of any type, of an earlier generation or of the latest. 3. Electronic system as in claim 1 , characterized in that the fixed telephone set is cordless. 4. Electronic system as in claim 1, characterized in that the fixed telephone set (70, 90, 105, 120) is connected to the cellular phone (10) by cable (12). 5. Electronic system as in claim 1 , characterized in that the cellular phone (10) is connected to the fixed telephone set (70, 95, 105, 120) by optic fibres. 6: Electronic system as in claim 1, characterized in that the cellular phone (10) is connected to the fixed telephone set (70, 95, 105, 120) by infrared rays. 7. Electronic system as in claim 1 , characterized in that the cellular phone (10) is connected to the fixed telephone set (70, 95, 105, 120) by electromagnetic wave, utilizing two antennas (82, 87) connected respectively to the celular phone (10) and to the fixed telephone (70, 95, 105) by cables (81 , 86). 8. Electronic system as in claim 1 , characterized in that connection between the cellular phone (100) fitted with a means (102) with contacts (101 ) and the telephone set (105, 120) is made by insertion of said cellular phone (100) in a seat (106) created for it in the fixed telephone set (105, 120) provided with a means (107) with electric contacts (108) for connection to the cellular phone network (25). 9. Electronic system as in claim 1 , characterized in that it comprises a microprocessor (31 , 125, 130). 10. Electronic system as in claim 9. Characterized in that the microprocessor (31 , 125, 130) is built into the fixed telephone set (95, 120). 11. Electronic system as in claim 9, characterized in that a microprocessor (31) determines interaction between the cellular phone network (25) and that of the fixed telephone (20). 12. Electronic system as in claim 11 , characterized in that the microprocessor (31 ) comprises a feed circuit (56), an interchange circuit (60) to which are connected both the lines of the fixed telephone 20 network through the interface circuit (50) that galvanically isolates the logic and control parts of the network, the protection filter circuit (51), the call recognition circuit (52), the circuit (53) for checking that the line is free, the enablement circuit (54) <and also the lines coming from the cellular phone network through the filter circuit (35), the amplifier circuit (36), the interface (38), the protective filter (39), the call recognition circuit (40), the circuit (41 ) for checking that the line is free, and the enablement circuit (42), said interchange circuit (60) being connected to a fixed telephone set (70, 95, 105) and to a circuit (55) for selecting outgoing calls from said fixed telephone set (70, 95, 105), permitting transmission and reception of calls through the fixed telephone network (20) and the cellular phone network (25), utilizing the keypad (74) and the handset (75) on the fixed telephone set (70, 95, 105), and the keypad (14) of the cellular phone (10, 100) and therefore all the functions in general, provided for the fixed telephone network (20) and for the cellular telephone network (25). 13. Electronic system as in claim 12, characterized in that the microprocessor (31 ) is placed in a specific structure (30) comprising three connections, one (12) for connection to the cellular phone network (25) by means of a cellular phone (10, 100), the second (22) for connection to the fixed telephone network (20), and the third (72) for connection to a fixed telephone set (70, 95, 105). 14. Electronic system as in claim 10, characterized in that a microprocessor (125) comprises the circuit (31 ) _ * connected to the electric feed circuit (62) for the telephone line (20), to the means (17, 108) for connecting with the cellular phone (10, 100), to the means (27) for the connector (21 ) on the fixed telephone network (20), to the ringing circuit (63), to the handset disconnection circuit (64), to the phonic circuit (65,66), to the keypad interface (67), to the keypad circuit (68). 15. Electronic system as in claim 10, characterized in that a microprocessor permits incoming and outgoing communication to be made with the cellular phone network (25) utilizing both the keypad (74) and the handset (75) of the fixed telephone (120). 16. Electronic system as in claim 10, characterized in that a microprocessor (130) permits incoming and outgoing communication to be made with the cellular phone network (25) utilizing the handset (75) of the fixed telephone set (120) and comprises connection, through the means (18), with the connector (11 ) of the cellular phone (10, 100) through the amplifier (125), the filter (126), the handset disconnection circuit (64), the phonic circuit (65,66) and the feed circuit (127) connectable to a source of electric current through the connector (128).

Inventors: PELUSO STEFANO, PELUSO, STEFANO
Applicants: PELUSO STEFANO, PELUSO, STEFANO
Application year: 2001
Main classification: H04M1
IPC codes: H04M1