The objects of this kind are according to the international classification classified in the class H01R 9/24.

State of the art The miniature disconnecting, switching and earthing strips are designed especially for the main distribution frame of the telephone exchanges (MDF) and digital distribution frame of exchanges (DDF) and for distribution boxes. The features are the options of fixing on the standard 35 mm hut rail, the asymmetry of contacts, enabling the crossing permutations, when the protection module is built in. The novelty of the invention is the version of filling with a gel in interspaces for the strips for the heavy duty conditions, 20 lines versions, earthings and high bit transmission characteristics together with the two lines protection module and line protection and protective charger for the protection of 20 lines version strip.

The strips, used in telecommunications and in data transmission are used for the connection of the lines, permutation of the lines according to the conversation density and data traphic density, likewise they enable to build in overvoltage protection modules, testing, separating, marking and additional applications. The strips are built in on the side of the distribution frame (MDF side) for the exchanges and/or on the line side and in distribution boxes in telecommunication net.

The feature of the invention is in the enabling of high density of connections on the smallest place possible of high bit transmission rate with minimal range of attenuation under 52 M bits/sec, which is up to 10 M bits always smaller as 1 % of attenuation on Cu conductors of nominal distance; up to 52 M bits/sec attenuation amounts to 3-4 %.

The contacts of the strips are arranged in two separation levels. The strips are fixed to the mounting frames. Mounting frames are serving as earthing components in the system of overvoltage protections and as inlets for cabel sets. Strips and mounting frames are placed on the main distribution frames, which are performed in modular way. Enlargements of connecting capacities are possible only by adding new distribution frame verticals. The further enlargement of density of wire connections on the limited volume of the distribution frame requires the miniaturization of the used modules on the account of the contact space.

The invention is very convenient for the telephone exchanges, which are on exposed places, in containers with very little area available, for the » fast link « and for the access nets.

The feature of the strips is in the earthing system, as it by its version enables together with the adapted protection modules and multistep equipotential equalization, twice or three times in the module, equipotentialy for each line separately, equipotential equalizations for two adjacent protection lines, as in the inside of the strip, at the contact with equipotential, for 4-5 times contact field and then with equalization on 10 parts earthing mounting frame of bearing strip with switchings through Alu and Cu bars for the complete MDF and final earthing, associated with equipotential equalization of power supply, independent earthing system, that is why the final earthing resistance against earth is not important. Especially 250,500 and 1000 pairs telephone exchange on translating from optics to classical conductors for the last communication kilometers demand as great as possible range through copper conductors. Digging in and replacing of cables is most expensive, therefore the protective circuit in the mentioned protection modules is performed in such a manner, that it never comes to burning of the cabel insulation, also, when a tempest discharge or overvoltage impuls opens the rude protection (gas arrestor) in the presence of occasional permanent voltage 230 V 50 Hz.

The second feature is in the chamber for gel insertion in the version of strips for heavy duty conditions, which are more often in telephone exchanges, fast links, in containers or access telephone exchanges and outer telephone boxes. The third feature is in the possibility of fixation of the strips to the earthing mounting frame, and in the third version in the option on the hut standard 35 mm rail, which can serve as good earthing, if it has an copper bar added. The fourth feature is permutation possibility on the small strip in the presence of individual protection modules without disconnection of these modules at permutation, due to the space area, enabling the work of mounting pincers.

The fifth feature are the inner earthing bars. The competitors have strips with outer earthing bars, which are dangerous for disiinserting and for the personal.

The earthing mounting frame can have openings on the bottom for the cable insertion from the back side, when they are bigger or an earthing bar leant against the side wall.

In the introduction it would be necessary to explain the situation on the distribution flame (MDF) and needs for higher and higher density of wire connections. The number of incoming and outgoing cables and therewith pairs, on the smallest volume possible in modern exchange, is increasing. One of the solutions of these problems is in the miniaturisation of the strips. However, the volume for the contact on the strip is reduced therewith the work of mounting staff becomes harder and more complex. The new strip solves these problems the mounting pincers remain of the same dimensions as previous. By connecting two strips it is possible to achieve from 10 pairs strip also 20 pairs strip on the line side.

On the market there is a great number of producers (Krone, Quante, Siemens, Corning, R & M, Agmar), having a perceivable trend of the miniaturisation of disconnecting, switching, earthing strips and they offer a number of different solutions. The disadvantages of the competitors are: - only group protection modules or additional outside earthing bar, - attached wires according to ITUT standard K 20 and test K44 ; isolations sets in fire, - permutation with the inserted module is not possible or the protection modules are hardly accessible and have insufficient earthing contact, - attachment to the standard hut rail is not possible, - the version of switching strip, which would always protect the exchange from injurious influences, is not possible, where the contacts are open and where no contact exists until the protection module or the disconnector are inserted, - there is no strip for heavy duty conditions, for the strips of the same family, filled with the gel.

- there is no universal connector of two strips to perform the 20 line combination.

Summary of the invention The disadvantages of the competitors are also: bad earthing system of the main earthing outside the strip enables at a failure the appearence of a part of the 230 V 50 Hz power supply voltage on the construction of main distribution frame, complex protection modules with high attenuation, modules of protection enabling the destruction of the insulation in the cable and irreparability of protection modules, that are damaged.

Our invention has surpassed the competitors in the miniaturisation step and the simplicity of the construction, the functionality, in the protection step and earthing system. The competitors have the earthing contact, which is not integrated into the strip, however, our invention has the earthing contact integrated into the strip, placed between contacts so that it enables good contact to the metal mounting frame. Due to miniaturisation the contact chambers are performed in such a manner, that they increase the breakdown strength and make crosstalks impossible.

Through Alu conducting nonoxidazing construction of the distribution frame (MDF) with the new strip, even the omission of earthing strips and of strong transverse earthing copper bars, is possible.

Brief description of enclosed drawings Further advantages and applicabilities of the invention will become more evident from the attached drawings and description. The attached drawings show: Fig. 1 The strip according to the invention in the side view.

Fig. 2 A cross-section of the strip with the inner asymmetric earthing visible.

Fig. 3,4, 5,6 Constructional features.

Fig. 7 A cross-section of the disconnecting strip and of the protection module or of the 10 line protection module.

Fig. 8 A cross-sectional view of the switching strip with the slit between the contacts.

Fig. 9 Twenty pairs composed version (1. view).

Fig. 10 Twenty pairs composed version (2. view).

Fig. 11 The earthing mounting frame.

Detailed description of the invention The object of the invention are miniature disconnecting, switching, earthing strips and inscription POTS, ISDN, ADSL, VDSL strip, in an uniform version and the protection, for the use in telecommunications and data transmission, with the help of which different connecting, measurement and protective tasks are carried out on a small space area, with the increased density of wire connections, with the aim to technically clearly arrange the connections from the line side and from the exchange side, performed in such a manner, that the cutting contacts, which cut the wire insulation and fix the wire, arranged in two rows in the same plane, are asymmetrical, inserted in a plastic housing and positioned in the chambers in such a manner that a high enough breakdown strength for the operation is ensured, and prevents crosstalks, and that it has the inner earthing contact, positioned asymmetrically to the channel, in which it is positioned and that on the ends of the upper part of the housing and the base, it has shaped snap ears, with which the mentioned strip is fixed to different mounting elements, shaped in such a manner to enable simple mounting and demounting.

The strip is substantially reduced in comparison with usual versions and simultaneously it enables irrespective of its miniaturisation the same operation parameters as non- miniature strips. In comparison with non-miniature-versions the raster of the line contacts is narrowed for 40 %. For example, with 20 lines in a given version is, for example, the width ratio 145 mm versus 122 mm in the old strip version for only 10 lines as shown in the fig. 9.

Deatiled description of th invention The miniature disconnecting, switching, earthing strip according to the invention serves for the carrying out different connection, measurement and protective tasks on a small volume, the surface density of connections is higher for 30 %, and is generaly composed of two parts, the upper part of the housing 1 and the base 2, made of a plastic material.

The mentioned upper part of the housing 1 is fitted with grooves 36 for guiding the wires of the cabel set, as shown in fig. 1.

In fig. 3 barriers are shown between mentioned groves 37, having a nipple 7 on the top, which is originally shaped so that it closes the mentioned groove 36 on the upper side and makes impossible the shifting of the respective wire, which is not shown in the figure, in the vertical direction. Barriers between mentioned grooves 37 are hollow and the opening extends to the already mentioned nipple 7 on the top of the barrier. Therein the line contacts 6 are inserted, fitted with cutting form surfaces 41 of a special shape, which can have in the option cutting function (cutting form surfaces result from flattened diagonal beating or the contact). The mentioned cutting form surfaces 41 extend into the area of the groove 36. At the mounting in the optional groove 36 an electrically conducting contact is formed between the respective conductor or more precisely between its electrically conducting core with the isolation envelope removed and between the respective line contact 6 or the mentioned cutting form surface 41, which cuts through the isolation of the respective wire, not shown in the figure and which is inserted with a defined force into the mentioned groove 36 and is cut into the Cu profil of the conductor to ensure good contact.

Fig. 2 shows the contact area, extending from the bottom of the upper part of the housing 1 to the mentioned nipple 7 on the top of the mentioned groove 36 and is in the horizontal direction closed with the barrier 42, extending from the bottom edge of the upper part of housing 1 to the nipple 7 on the top of the groove. In the upper part of the housing 1 there is a slit 43 for the earthing contact of the respective protection module, which is placed asymmetrically with regard to both rows of the barriers 44 on the upper edge of the upper part of the housing 1, with some openings for fixing combs on the mentioned earthing contact 5. On the extreme ends of the upper part of the mentioned housing 1, snap ears 45 are shaped, with which it is fixed to the mounting frame, shaped in the manner to enable simple demounting.

On the circumference of the upper part of the housing 1 and the base 2 further snap ears 30,39 are formed, with which the mentioned strip is fixed to different mounting elements and are shaped in such a manner that they enable simple mounting and demounting.

The line connections are labelled on the inner side of the upper part of the housing 1.

As it is shown in fig. 6, the base 2 has formed asymmetrical bearings of line contacts 14, which support, spread apart and hold the line contacts in the accurate distance. The base 2 enables fixed attachment of the already mentioned earthing contact of the strip 5.

Line contacts 6 are made of two parts, contact-left 3,47 and contact-right 4, 46, with regard to the axis 15, they are asymmetrically placed and are also asymmetrical in form, are inserted in the contact area, extending from the bottom of the upper part of the housing 1 to the mentioned nipple 7 on the top of the groove and are serving for the forming of the electrical contact with the respective wire of the cabel set, which is not shown in the figure.

The grooves on the upper part of the housing 1 and the grooves on the base are shaped in such a manner, that the mentioned earthing contact 5 settles into it. The shape of the base 2 enables, however, that this earthing contact 5 is hemmed and in such a manner the stiffness of the whole strip is increased.

The already mentioned earthing contact 5 is a part of the miniature strip 60, because the earthing contact bar 27 is already built in the strip, except when permutation strips and inscription strips are concerned. The cause: at inscriptions and for the exchange side the protection is not needed.

The miniature disconnecting, switching, earthing strip according to the invention with the upper part of the housing 1 and the base 2 has on the very upper part of the housing 1 in the inside built in the earthing contact 5. As shown in fig. 7 and 8 with the upper setting in spite of highly reduced dimension of the miniature disconnecting, switching, earthing strip 60 according to the invention the installation of such respective protection modules 20 is made possible, which enable the permutation area 19 also, when the respective protection module 20 is already inserted. In such a manner the telephone exchange is protected also for the time of permutation, what is not enabled by the strips of the competitors. The high support 9 prevents together with the isolation edge 19 the slip of the contact 46 or 47 at high force at impressing of the conductor cores into the contact cutting field 41. The mentioned nipple 7 prevents the falling out of the conductors, which are possible due to the position of permutation wires of two neighbouring profiles of Cu conductors.

Therewith the earthing bar 18 of the respective protection module 20 slides with his spring nipple contact 17 and sets-up electrical equipotential contact with the mentioned earthing contact of the strip 5 in form of the into the strip built one-piece contact bar, serving for 10 pairs simultaneously.

It is possible to fill up the closed interspaces 22 and 23 with the respective protective gel 21 without its flowing out. In such a manner a strip for heavy duty conditions is obtained in a small version, as shown in fig. 7.

In fig. 4 the area 12 for plugging the respective protection module 20 for inserting the earthing contact 17,18 is shown. Further the central groove for the contact 10 is shown in fig. 5 and 6, with the hole 8 for the nipple contact 17 of the earthing contact of the protection module and the area for the contact 13. The miniature disconnecting, switching, earthing strip according to the invention offers the possibility of fixing the earthing contact bar 27 on the 35 mm standard hut rail 24, which is most frequently in use in common connection distribution boxes, with the help of spring metal snap 26.

The contact of the earthing contact bar 27 with the 35 mm standard hut rail 24 leads with the leg 28 to the bar of the equipotential equalization 29 and contact 30 with the earthing contact 5 on both ends of the strip, where this otherwise contacts the earthing mounting frame 47, what is shown in fig. 11.

With the connection 48 of two strips with 10 lines (fig. 9 and fig. 10) on the extreme edge 34, it is possible to make 20 pairs strip 35, which is especially convenient for the container versions of MDF and exchanges, which lack of area.

The above description comprises many features, which do not limit the scope of the invention, but they serve as an illustration of the invented product versions.