MXPA97010096A - Procedure for conducting a telephone or informative link interconnection rules and regulations obtained by this procedimie - Google Patents

Abstract

The present invention relates to interconnection terminal of telephone or computer lines with a degree of rejection of paradifonía that responds to very strict standards. The extension (9) of each autodesnudante (5) has a bevel size (12) on the edge (11) that adjoins the adjacent pair (3,

Description

PROCEDURE FOR CONDUCTING A REGULATION OF INTERCONNECTION OF TELEPHONE OR COMPUTER LINES. AND REGULATION OBTAINED BY THIS PROCEDURE The present invention relates to a method for realizing an interconnection strip of telephone or computer lines. It also refers to a strip obtained by this procedure. These strips commonly equip the telephone distributors, in which they serve to connect, on demand, the different single-line lines of the Telephone Distribution Company with the different corresponding subscriber lines. There are then several hundred, and even several thousands, of these. As a state of the art, documents FR-A-2,495, FR-A-2,662,042 and EP-A-524,115 can be cited. These known technique strips comprise all, at least, two parallel rows of substantially flat metal contacts, placed facing each other from one row to the other, these metal contacts being provided with an axial self-disconnecting slot of the threads to be spliced. A contact of this type is described, for example, in document FR-A-2,330,159. Contacts in the same row are coplanar. The contacts of the two parallel rows mentioned above are identical. To ensure the continuity of the two lines, each contact of one of these two conjugated rows is connected to the conjugate contact (ie: the one in front of it) of the other row by a metal union, which is, or a union that presents a possibility of cutting, and it then deals with conjugate contacts "for cutting", or a direct union without possibility for cutting, and it is then conjugate contacts "in U". One of these two conjugate contacts is called "input contact", because it receives one of the two wires from the arrival line (coming from the Telephone Distribution Company), while the other contact is called "contact output", because receives the corresponding wire from the output bifilar line (that is: the subscriber line). In each row of these two opposing rows, a determined number of pairs of adjacent contacts is found, this number of pairs depending on the width of the strip. Each pair of contacts is used to receive the two wires of a telephone line, that is, the line of arrival for the row containing the aforementioned input contacts and the output line for the row containing the output contacts before cited. The substantially flat contacts provided by the strips currently marketed by the Applicant Company are quite similar to that which is the subject of document FR-A-2,330,159 and, in particular, to that shown in Figure 1 of this document. This contact includes, of course, the main part, flat and of generally fixed width, which contains the self-disengaging groove, and this main part extends for a part sensibly of equal width, which we will call "prolongation" and which serves here to join this contact to the aforementioned conjugate contact, that is to say to the contact that is opposite in the other row. When it is a joint for cutting, this extension is elastic, and comprises, at its free end, a contact plot with the conjugated, elastic and identical prolongation, of the conjugate contact facing it. When it is a union in U, this prolongation is common to that of this conjugate contact, with which it constitutes, therefore, a bridge of union made in a single piece. With the current increase in the operating frequencies of the telephone and computer facilities, a problem of the degree of near-freeness between two adjacent pairs arises in these strips, the current strips of the prior art not responding to the standards of rejection of near-freezes that are now valid and that are much more written than the rules that apply to the strips of the aforementioned prior art. To fix the ideas, it is now required, for frequencies that can go up to 100 megahertz, a degree of rejection of near-end-to-end crosstalk that is greater than 40 dB, whereas in the past it was satisfied with a degree of rejection of near-zero frequency simply exceeding 20 dB. The manufacturers are then induced: • either to increase the separation between two adjacent pairs in the same row of contacts, which has the disadvantage of increasing the dimensions of the strip for the same number of pairs, or of decreasing the number of pairs if the same dimensions of this strip; • or to decrease as much as described, for example, in EP-AO.637.097 and EP-AO.654.851, the width dimensions of each contact, which has the disadvantage of embrittling it more than desirable to obtain good reliability. The invention aims to remedy these drawbacks. It refers, for this purpose, to a procedure for realization to an interconnection strip of telephone or computer lines, this strip comprising at least two parallel rows of conjugated self-decontacting metal contacts, each of these self-depleting contacts having a main part that it comprises the self-disconnecting connecting groove, this main part being continued by an extension serving to connect this metallic contact with its conjugate metal contact (that is, placed opposite in the other row), the contacts of the same row being grouped by pairs of contacts adjacent, each pair receiving the two threads of the same line, telephone or computer, bifiliar, this procedure being characterized because it consists, in order to obtain a degree of rejection of crosstalk between two paras adjacent that is superior to that of a standard strip of the known technique, without having to increase the spacing between two adjacent pairs of contacts of the same row, in assembling in this standard strip, which presents, therefore, a degree of rejection of crosstalk between adjacent pairs that is insufficient with the same width, but whose prolongation is carved in bevel at the edge of linda with the contact immediately next to the adjacent pair of the same row. The invention also relates to an interconnection strip of telephone or computer lines, this strip being made according to the aforementioned method and being characterized in that said prolongation of each self-undressing contact, thus carved in bevel, is an elastic extension comprising a contact patch at its free end, so that these two conjugated elastic extensions thus constitute a joint for cutting that is carved at an angle at only one of its edges, which abuts the mirror-union and immediately next to the two pairs adjacent conjugates. The invention also relates to an interconnection strip of telephone or computer lines, this strip being made according to the aforementioned method and being characterized in that said prolongation of each self-undressing contact, thus carved at an angle on a single edge, is a prolongation that is common with that of the corresponding conjugate contact, so that these two extensions conjugates thus constitute a connecting bridge made in a single piece and carved at an angle on only one of its two edges, which abuts the bridge-mirror and immediately next to the two adjacent conjugate pairs, The invention will be well understood, and its Advantages and other features will be better understood, from the following description of two non-limiting examples of embodiment, in relation to the attached schematic drawings, in which: Figure 1 is a partial perspective view, with sections, of a strip with U-joints according to the invention. • Figure 2 shows the strip of Figure 1, in which only the self-emptying contacts are drawn in a continuous line. • Figure 3 is a cross section of this same strip, made in the plane of the self-disconnecting grooves of two contacts with U-joint and, more precisely, according to III-III of Figure 2. • Figure 4 is a seen from above, very rudimentary, of this same strip and that shows the distribution "in mirror" of the contacts of this strip. • Figure 5 is a view similar to Figure 1, but showing the application of the invention to a strip with joints for cutting. • Figure 6 is a view similar to Figure 2, but relative to the strip according to Figure 5. Referring, in the first place, to the set of Figures 1 to 4, it is, in this first embodiment, a strip with "U-shaped" joints. This strip comprises a body 14 of plastic material which solidly holds in position the two parallel rows R1, R2 of self-draining metal contacts. In Figures 1 and 2 only the first five contacts 1, 2, 3, 4, 5 of the first row R1 and the fifth contact 5 'of the second row R2 are represented. The contact 5 'is the conjugate contact of contact 5, that is to say it is the contact that is placed in the other row, in front of this contact 5. The same happens with contacts 1', 2 ', 3' and 4 '( Figure 4) of row R2, which are respectively the conjugate contacts of contacts 1, 2, 3 and 4 of the other row R1. The contacts 1 and 2 are intended to receive the two wires of the same bifiliar line, for example, of a first line of arrival, and they are said to constitute a "pair" of contacts forming part of the first row R1. In the same way, contacts 3 and 4 are intended to receive the two wires of a second line of arrival, and constitute a second pair of contacts of row R1, etc. The contacts 1 'and 2' of the row R2, conjugated, respectively, of the contacts 1 and 2, are intended to receive the two wires of a bifiliar line, for example of a first line of output, that the strip has the function of interconnecting to the first line of arrival in the conjugate contacts 1 and 2 of the other row R1. These contacts 1 'and 2' form the first "pair" of contacts of row R2. As you can see, two contacts form, therefore, "a pair" when they receive the two wires of the same telephone line or monopar computer. Each contact comprises a main part 7 receiving the self-disengaging axial groove 8 and continuing downwards through an extension 9 which has the function of electrically connecting the contact with its conjugate contact. The main part 7 of the contacts that are represented in Figures 1 to 3 is made, according to the technology of the Applicant Society, with a folded band and provided with an alignment "tear" 6, but this particular mode of embodiment is not in no way obligatory for carrying out the invention. The strip according to Figures 1 to 4 being a strip with "U-shaped" joints, each extension 9 of a contact is joined in a single piece with the corresponding prolongation of the conjugate contact, to finally form a "U-shaped" connecting bridge. "10 between these two conjugate contacts (see, for example, the conjugate contacts 5 and 5 ', the only ones fully represented in Figures 1 to 3). For the strips marketed so far by the Applicant Society, the extension 9 of each contact has, practically, the same width as the main part 7 of this contact. These strips have a degree of rejection of near-end, between adjacent pairs of the same row, which is the order of 22 to 25 dB, which does not correspond to the current "category 5" standards, which require a degree of rejection of paradiphony greater than 40 dB. In order to respond to these new "category 5" standards, the invention consists, in order to provide the strip with the same number of pairs as these standard strips of the known technique, without thereby increasing the spacing between adjacent pairs of a same row (for example, between the pairs 1, 2 and 3, 4), nor decrease in width the main part of the contacts so as not to embrittle these in mounting on this standard strip 14 metal contacts 1, 2, 3, 4, 5 , ... 1", 2 ', 3', 4 ', 4', ..., whose main part 7 is thus maintained with the same width, but whose extension 9 is carved in bevel 12 at the edge 11 which abuts the immediately next contact (4 'for the contact 5') of the adjacent pair of contacts 3 ', 4' of the same row R2. In fact, on the strip according to Figures 1 to 4, the bridge 10 is, therefore, carved at an angle at one of its edges, that is to say the edge 11 that adjoins the "mirror" bridge and immediately next 10 '(Figure 4) of the two conjugate pairs of contacts 3, 4 and 3 ', 4' adjacent. As shown in Figure 4, the near bridge 10 'is the symmetric of this bridge 10 relative to a plane P orthogonal to the plane of the strip and which separates the conjugate contacts 4, 4' from the conjugate contacts 5, 5 '. The bridge 10 'is, therefore, the image of the bridge 10 in relation to this plane P, whence the name of bridge- "mirror" given here to the bridge 10' in relation to the bridge 10. The same happens with the conjugated contacts 2, 2 'whose bevel 12 is the "mirror" image of the corresponding bevel 12 of the pair of conjugate contacts 3, 3' immediately next to the two conjugate pairs of contacts 3, 4 and 3 ', 4' adjacent to these two conjugate pairs of contacts 1, 2 and 1 ', 2', etc ... Figures 5 and 6 schematize another example of embodiment that differs from what it is according to Figures 1 to 4, by the fact that the strip in question It is a strip with unions "for cutting" and not a strip with unions "in U". Thus, each contact 1, 2, 3, 4, ..., is provided with an elastic extension 9 comprising, at its free end, a plot 13 intended to establish the electrical contact with the corresponding plot of the conjugate contact (not represented). These extensions 9 each comprise, according to the invention, a bevel size 12 similar to that corresponding to the embodiment according to FIGS. 1 to 4. The two conjugate elastic extensions 9 of two conjugate contacts, constitute, thus, a cutting joint which, as above, is carved in bevel at only one of its two edges: the edge 11 adjoining the mirror-junction and immediately next to the two adjacent conjugate pairs (see, for example, edges 11 and 11). 'in Figure 6, symmetrical one from another in relation to a plane - "mirror" corresponding to the plane P 'indicated in the preceding Figure 4). To fix the ideas with numerical examples, not limiting, the width of the main part 7 of the contacts according to Figures 1 to 6, is, classically, of 3, 5 millimeters, the bevel size 12 in the "U-shaped" embodiment of Figures 1 to 4 progressively reduces this width to 1.5 millimeters, while this bevel size 12 in the "cut-out" embodiment according to Figures 5 and 6 reduces it to approximately 1 mm. Keeping constant the distance between the acial slots of two adjacent contacts of the same row, as in the standard strips currently marketed by the Applicant Society, millimeters (which corresponds to a step of 10 mm for a strip), it has been possible to measure: - in a "U" strip according to Figures 1 to 4, a degree of rejection of near-zero frequency between two adjacent pairs of the order of 43 to 44 dB. and in the "for cutting" strip according to Figures 5 and 6, a degree of rejection of near-end-frequency between two adjacent pairs of the order of 41 to 42 dB. As is evident, the invention is not limited to the two embodiments that have just been described and applied. Naturally, to other types of strips, for example, to the various strips described in the document FR-A-2,495,847 cited above Although the contacts represented in the examples that have been described are substantially flat contacts, the invention would also apply to strips that were equipped with self-decontacting contacts that were not truly flat, or even completely flat.

Claims (3)

1 .- Procedure for making an interconnection terminal of telephone or computer lines, this strip comprising at least two parallel strips (R 1, R2) of conjugated self-decontacting metal contacts (5, 5 '), each of these having self-distracting contacts a main part (7) comprising the self-disconnecting connecting groove (8), this main part (7) being continued by an extension (9) that serves to join this metallic contact (5), that is, placed opposite in the another row, the contacts of the same row (R1) being grouped by pairs (1, 2 - 3, 4) of adjacent contacts, each pair receiving (1, 2) the two wires of the same telephone or computer line, bifiliar, characterized in that it consists, in order to obtain a degree of rejection of diaphragm between two adjacent pairs (1, 2 - 3, 4) that is higher than that of a standard strip of the known technique, without having to increase the spacing I feel between two adjacent pairs (1, 2 - 3, 4) of contacts of the same row (R 1), in mounting on this standard strip that presents, therefore, a degree of rejection of near-end-of-pairs crosstalk that is insufficient, contacts metal self-discharging whose main part (7) is maintained with the same width, but whose extension (9) is carved in bevel (12) on the edge (1 1) that abuts the contact immediately next to the adjacent pair of the same row.

2. - Interconnection strip of telephone or computer lines, this strip being made according to the method according to claim 1, characterized in that the said prolongation (9) of each self-undressing contact (5), thus carved in bevel, is an elastic extension that is common with the conjugate contact autodesnudante (5 '), so that these two conjugated extensions (9) constitute, thus, a bridge of union (10) made in one piece and carved in bevel in a single (1 1) of its two edges, which adjoins the mirror bridge (1 0 ') and immediately next to the two adjacent conjugate pairs.

3.- Interconnection line for telephone or computer lines, this system being made according to the method according to claim 1, characterized in that said prolongation (9) of each self-undressing contact, thus carved in bevel, is an elastic extension comprising a contact plot (13) is its free end, so that these two conjugated elastic extensions thus constitute a joint for cutting that is carved in bevel on only one of its edges, which adjoins the mirror junction and immediately next to the edges. two adjacent conjugate pairs.