MXPA00006723A - Telephonic connection wire for ordinary voice service and high performance services in data and video transmission - Google Patents

Abstract

A telephonic connection wire type VVDC (voice, video, data, and connection) which allows the connection of users to the public telephonic system with a link of digital services at high speed, as well as the required analogical services;characterized for comprising two transmission circuits being one of them formed by two conductor elements also cooperating to self-sustain the wire in its combination;and being the second circuit formed by a twisted pair of conductors.

Description

Y CABLE OF TELEPHONE CONNECTION FOR ORDINARY SERVICE OF VOICE AND SERVICES OF HIGH PERFORMANCE IN TRANSMISSION OF DATA AND VIDEO BACKGROUND OF THE INVENTION Field of the Invention: The present invention refers to a telephone connection cable type VVDA (voice, video, data and service) that allows users to connect to the public telephone system with a link of high-speed digital services in addition to the analog services that are offered today. The above is achieved by integrating a balanced circuit to the original design of two parallel metallic elements that also serve as self-sustaining elements.

Description of the Prior Art: Generally, the aerial connections of the unit telephony services have been limited in their bandwidth and resistance to radio interference due to their design. The demand for transmission media capable of supporting a bandwidth large enough to meet the growing demand for digital services in the coming years also requires designs that do not increase costs and limit the ease of installation of current products and in the In the case of the cables used to connect users to the telephone network, the design represents a decisive factor. The cable should maintain a low weight and price, it should be able to allow the transmission of data at speeds beyond 155 Mbps, have an acceptable response in frequencies beyond 100 MHz and also support its own weight in clearings of more 100 meters, the cable must also be resistant to weathering and in wind and ice conditions the design should allow to be reinforced without having to change shape, in such a way that it allows to use the same anchoring elements commonly used in this type of services Among known techniques for overcoming the aforementioned problems, it is described in Pat. US 4,467,138 to "a plural communication conductor cable" whose design is related to a flat construction conductor for communication having two or more communication ports, insulated cables with polyolefins, assembled along their length arranged in groups on opposite sides and parallel to a conductive steel wire.

Although already known cables that have twisted pair conductors in their conformation not all have the same application, ie depending on their use the design varies in each case and even the number of steps of the twisted pair, so for example in the US Pat. No. 6,064,008 describes a communication cable which represents two pairs of stranded conductors, whose main characteristic is not the twisted pairs but the insulating filling material based on a chemical polymer of fluorinated polymer with a blowing agent.

The applicant has developed a connection cable type VVDA whose novel feature is that the design has two transmission circuits available, using one of them as a self-supporting element for aerial connections and the transmission of voice signals; the other circuit will allow, if required, to have a dedicated digital signal transmission service to. high speeds without interfering at all with voice service signals or the use of additional electronic circuits to separate the signals. The design is also highly resistant to crosstalk between both circuits.

DESCRIPTION OF THE INVENTION Next, the invention is described according to the drawings of Figs. 1 to 3, wherein: Fig. 1 Is an isometric view with cross section of the telephone connection cable for high performance services in data transmission and ordinary voice type service (VVDA), which shows the sections of it.

Fig. 2 is a cross-sectional view of Fig. 1, showing the arrangement of the two transmission circuits in a single cable.

Fig. 3 is a sectional view of Fig. 1, showing the helical assembly of the protective tape against melting.

The connection cable type VVDA (Voice, Video, Data, Connection) 10, is characterized by being formed by two metallic elements that allow self-support in aerial connections 11, 18 and also transmit voice signals since they form a circuit between them intended for the transmission of analog signals; a circuit that will allow the transmission of data in relative high speeds formed by two metallic wires 12 and 19 isolated individually with a thermoplastic compound 13 of polyethylene or polypropylene and braided together forming a balanced circuit of 100 ohms impedance lhms impedance 14 highly characteristic resistant to crosstalk that could arise due to the conjugation of the elements in the same plane of transmission. The twisted pair 14 or balanced circuit is covered by a mylar tape 15, very thin of material resistant to temperature up to 240 ° C, the two circuits are covered by a thermoplastic material 16 that will protect them from the environment and that will also serve to integrate them in a body that will facilitate its handling and allow its installation in gaps of more than 100 meters; The geometric figure of the cable 17 will allow to be subjected to tension or compression by anchoring elements without any of the transmission components suffering mechanical damage that deteriorates its electrical characteristics.

Connection cable (VVDA) Fig. 1 The cable object of the invention 10, is an elongated rectangular body whose ends 20, rounded corners for its best installation operation, also presents in its lateral ends in the middle part subsidence 17 to form a semirectangular geometric figure.- The connection cable is distributed equidistantly in its structure 16 to two transmission circuits which does not require for its installation any special type of hardware for its anchoring or fixing to the pole or terminal distribution box. the telephone network and the home of the subscriber or user of telephone services. The circuit elements intended for voice transmission 11, are formed by metallic cylindrical conductors not limited in their composition and cross section, that is, the elements may be made of metal alloys or composition of two hardened metals with a treatment such as to offer a high effort to break, since these elements are also intended to sustain themselves and the other elements that make up the cable. However, the heat treatment to which they are subjected must be (45 ° to 550 ° C) whereby these conductors or metallic self-supporting elements of the cable do not substantially lose their characteristics of resistance to the passage of electric current. These elements 11 are arranged longitudinally parallel to one another and spaced apart at a distance between 4 and 6 mm. which allows the accommodation of the second transmission circuit 14 in the middle part of them: These circuit elements are arranged to provide an appropriate means for the transmission of digital signals 12 at relatively high speeds, (155 Mbps) are constituted by metallic conductors of a practically cylindrical shape of soft copper annealed with a purity of 100% and drawn with a smooth surface with a diameter (from 0.5 to 0.64 mm.) that allows connections to distances of up to 150 m. and with relative low losses 22 Db / 100 to 100 MHz Each of the conductive elements is individually insulated with a layer of thermoplastic compound 13 applied continuously and highly uniformly, ensuring that the concentricity of the wall of insulating material with respect to the conductor is higher than 90% This layer of insulation can be applied in a single layer or several and each of the insulation is colored to facilitate identification, the material used for the layers can be solid, expanded by physical or chemical action or have components that delay or inhibit the spread of the flame; the conductors thus isolated are twisted 14, forming a pair or balanced circuit whose distance between each braid of the conductors is of a length such that it allows to minimize the effects of crosstalk caused by the proximity of another element emitting electromagnetic signals and in turn also reduces the exit of energy towards the other circuit. The twisted pair 14 has an optimal performance since the control of the thickness of the wall and the propeller of each of the stranded conductors to form the pair ensures a stability of the characteristic impedance at relatively high frequencies and the circuit remains in an excellent electric balance thus minimizing the interference of external agents: the balanced circuit or twisted pair is covered by a protective tape against melting, of thin dimension of temperature resistant material, applied in helical or longitudinal form on it. The tape prevents during the application of the outer cover 16 by means of an extrusion process, and due to the heat transfer of the compound towards the insulated conductors present a fusion of the material of the insulations with each other and / or between the compound of the cover. This tape also allows acting as a barrier to not allow the transmission area of the balanced circuit to be invaded by the composite of the cover and modify its dielectric constant and in turn its characteristic impedance, which increases the loss of the circuit due to a Higher capacitance, a cover reinforced by its design form based on a thermoplastic compound 16 that forms an integral body and that maintains the self-supporting elements on each side and in parallel diametrically opposed to the twisted pair.

Cover 16 protects both elements from mechanical abuse that may occur during storage, transportation and installation. The compound of the cover is resistant to the environment where it will be installed and also protects the circuits of premature aging by the action of the sun, water or some other external agent. This compound can also be resistant to the propagation of the flame, if required where the cable is installed.

The design of the body of the cable has a figure 17 in geometric shape of rectangular with devastated edges 20, which will allow the product to be installed using any of the fastening fittings currently designed, also prevents the components from being damaged by the forces of tension and compression to which they are subjected during their installation or daily operation.

Another advantage of the cable design is the resistance to tension, ie the increase in the distance of the installation glaze can be solved by changing the cross section of the support elements or the type of material used in them.

Claims (1)

1. R E I V I N D I C A C I O N S A telephone connection cable for high performance services of voice, video, data and service transmission (VVDA) which comprises an integral thermoplastic external cover with a semirectangular geometrical design, the cable being characterized in equidistantly arranged in its internal structure. of two transmission circuits where the first circuit is formed by two metallic conductive elements, which in turn cooperate for the self-support of the cable as a whole and are respectively arranged each at their opposite end in parallel and at the same time are diametrically opposed to the second transmission circuit formed by a twisted pair of conductors disposed at the center of the structure, wherein said torque conductors are individually insulated with a layer of thermoplastic compound and are further protected from the heat of fusion up to 240 ° C transmitted by convection , with a resistant plastic tape at the melting temperature. The telephone connection cable for high performance services (VVDA), according to clause 1, characterized in that the circuit formed by a twisted pair or balanced circuit has a characteristic impedance of 100 ohms. The telephone connection cable for high performance services (VVDA), of clause 1, characterized in that the two metal conductors arranged equidistantly and at the ends of the cable allow the self-support in aerial connections and also allow the transmission of voice signals due that between them they form a circuit oriented to the transmission of analog signals. The telephone connection cable for high performance services (VVDA), of clause 1, characterized in that the twisted pair circuit allows the transmission of digital signal data at speeds of 155 Mbps and is drawn with a smooth surface at diameters of 0.5 to 0.64 mm. and that allow links to be made 150 m., And the distance between each braid of the conductors allows to considerably reduce the effects of crosstalk caused by the proximity of another element emitting electromagnetic signals and also reduces the outflow of energy to another circuit. The telephone connection cable of clause 1, characterized in that each of the conductors is insulated with a thermoplastic layer applied in a continuous and highly uniform manner in such a way that the concentricity of the wall of the insulating material with respect to the conductor is higher than 90% and can be colored for identification.