KR200176024Y1 - Structure for mounting compatible converter card of differential trunk signals in an exchange system - Google Patents

Abstract

The present invention is applied between the trunk card (e.g., T1 trunk card) and the backplane connector, which is applied to the exchanger and enables an interchangeable conversion process for trunk signals of different heterogeneous (T1 / E1) trunk signals. The present invention relates to a mounting structure of a compatible converter card of heterogeneous trunk signals in an exchange for properly mounting.

According to the present invention, a line connector is installed on a trunk card (T1 trunk card), and a line connector is also installed on the E1 / T1 trunk card corresponding to the line connector, and a power connector is installed on the trunk card and the power A power connector installed in the E1 / T1 converter card is installed corresponding to the connector, and the E1 / T1 connector card is coupled to the trunk card by mutual coupling of the line connector and the power connector, and the trunk card is signaled. It is to be interposed between the backplane connector and the piggyback (Piggyback) method.

Description

Structure for mounting compatible converter card of differential trunk signals in an exchange system}

The present invention relates to a mounting structure of a compatible converter card of a heterogeneous trunk signal in an exchanger, and more particularly to an E1 / T1 converter card capable of compatible conversion of an E1 / T1 method applied to a communication network of a voice signal. The present invention relates to a mounting structure of a compatible converter card of a heterogeneous trunk signal in an exchange to be connected without a structural change.

In the exchange which forms a communication network for exchanging voice signals between subscribers, the relay of the voice signal is classified into a North American (NAS; T1) method and a European (CEPT; E1) method based on the trunk signal type as a communication method.

According to the NAS system T1 and CEPT E1 signal system, the voice frequency is 300 to 3400 kHz, and the sampling rate for the voice frequency signal is set to 8 kHz. In addition, the E1 trunk line and the T1 trunk line have a four-line structure for transmitting voice data (Tx T / R; T is a tip signal line, R is a ring signal line) and a reception (Rx T / R).

In addition, in the case of T1, the encoding process is performed by the A-law (A = 87.6) transformation method, whereas the T1 is encoded by the μ-law (μ = 255) transformation scheme. The transmission of voice data is 2.408 Mbps for T1, but at 1.544 Mbps for E1.

The transmission of such a voice signal is carried out in units of frames. The frame unit is composed of 24 channels of 8 bits in the E1 scheme and 32 channels of 8it in the T1 scheme. That is, in the E1 method, 1-frame bits (A / B; A = B) for frame synchronization are allocated to the head position of 24 channels, and accordingly, the number of bits of each frame of voice data in the E1 method is 193 bits. (8 bits × 24 channels + 1 frame bit). In contrast, in the T1 method, the number of bits of each one frame is 256 bits (8 bits x 32 channels), and signaling bits (A / B / C / D; C / D is 0/1) are added to the 16th timeslot. Included in a separate channel.

Therefore, in the general exchanger, the E1 trunk card and the T1 trunk card are intermixed with each other for relay processing of the E1 method and the T1 method representing different signaling systems.

Here, referring to the structure in which the T1 trunk card is typically mounted on the exchanger with reference to FIG. 1, in the rack self formed as a rectangular body by a plurality of frames 10, a plurality of guide rails 11 are formed at upper and lower sides thereof. The T1 trunk card 12 is detachably mounted, and the T1 trunk card 12 is signaled to the backplane connector 13 formed at the rear of the rack self by a connector (not shown) formed at the rear thereof. The connection is made.

In the case of signal connection between the T1 trunk card 12 and the backplane connector 13 shown in FIG. 2, the first and second transformers 14a for blocking DC components provided on the T1 trunk card 12 are also provided. Tb trunk signal transmission and reception (Tx-tip in / Tx-ring in; Rx-tip out / Rx-ring out) are performed via (14b).

However, in order to mutually process the E1 / T1 trunk signals, it is necessary to match the relay method of the voice signals by the operator's operation of the exchange. In addition to the need for an E1 / T1 converter that can be used, mounting of the E1 / T1 converter on the exchanger is necessary.

However, in the current exchange, since the E1 trunk card or the T1 trunk card is provided as a stand alone type or as a rack shelf, additional installation of the E1 / T1 converter card is not easy. For example, in the case of the stand-alone type, a structural design change related to the supply of the operating power to the E1 / T1 converter card or the connection for signal exchange is required. In the case of the collective type, the rack self of the exchanger shown in FIG. It is necessary to change the structure and the structure of the back plane connector.

The present invention has been made in view of the above-described prior art, and piggybacks an E1 / T1 converter card to a T1 trunk card, which is capable of interchangeably converting trunk signals of different heterogeneous systems (E1 / T1) applied to an exchange. It is an object of the present invention to provide a mounting structure of a compatible converter card of a heterogeneous trunk signal in an exchange that is connected in a piggy back manner to enable a smooth exchange of an operating power source and an E1 / T1 conversion signal.

In order to achieve the above object, according to a preferred embodiment of the present invention, a trunk card for relaying the trunk signal of the North American (T1) method and the trunk signal of the European (E1) method is connected to the backplane connector, A line connector is installed on the trunk card and a line connector is installed on the E1 / T1 trunk card corresponding to the line connector, and a power connector is installed on the trunk card and the E1 / T1 converter corresponding to the power connector. The power connector installed in the card is installed, and the E1 / T1 connector card is coupled on the trunk card by mutual coupling of the line connector and the power connector, and is interposed between the trunk card and the backplane connector. A mounting structure for a compatible converter card of a heterogeneous trunk signal is provided.

Preferably, according to the present invention, the line connector on the trunk card is provided at the extraction position of the first and second transformers provided on the trunk card to remove the direct current component of the voice signal of the trunk signal. The transformer is installed at the rear end of the line connector of the E1 / T1 converter card.

In addition, the power connector of the trunk card is installed at the extraction position of the voltage stabilization bypass capacitor installed in the trunk card, the extracted bypass capacitor is the trunk card at the rear end of the power connector of the E1 / T1 converter card. And a parallel connection to the E1 / T1 converter card.

According to the present invention of the above structure, the trunk of the exchanger via a line connector and a power connector, which are installed on the trunk card, an E1 / T1 converter card for mutually converting and processing different types of trunk signals at the exchange. It is possible to combine on the trunk card (ie, T1 trunk card) by piggyback method without structural change of card and backplane connector.

1 is a view for explaining a mounting structure of a trunk card (T1 trunk card) to the backplane connector of a switch according to a conventional example;

FIG. 2 is a schematic diagram illustrating a signal line connection state between a trunk card and a backplane connector shown in FIG. 1;

3 is a schematic diagram illustrating a signal system of a mounting structure of a compatible converter card of a heterogeneous trunk signal in an exchange according to the present invention;

4A is a reference diagram for explaining a power system of a mounting structure of a compatible converter card of a heterogeneous trunk signal in an exchange according to the present invention;

Figure 4b is a schematic diagram for explaining the power system of the compatible converter card mounting structure of the heterogeneous trunk signal in the exchange according to the present invention,

5 is a schematic perspective view illustrating a mounting structure of a compatible converter card of a heterogeneous trunk signal in an exchange according to the present invention.

* Description of the symbols for the main parts of the drawings *

20: trunk card (T1 trunk card), 22: line connector for E1 / T1 converter card connection,

30: backplane connector, 40: E1 / T1 converter card,

42: line connector for T1 trunk card connection,

202a-202n, 404a-404n: bypass capacitor,

204a to 204n: power connector, 402a to 402n: power connector.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic diagram illustrating a signal system of a mounting structure of a compatible converter card of a heterogeneous trunk signal in an exchange according to the present invention. In the figure, an E1 / T1 converter card 40 having a conversion function compatible with an E1 type signal and a T1 type signal between the T1 trunk card indicated by reference numeral 20 and the backplane connector indicated by reference numeral 30. Is intermittently signaled.

Indeed, according to the present invention, in order to mount the E1 / T1 converter card 40 on the T1 trunk card 20 in a piggyback form, the first and second transformers on the T1 trunk card 20 (in FIG. 2). 14a and 14b), and the line connectors 22a and 22b for connecting the E1 / T1 converter card are installed at the extracted position, and the E1 / T1 converter card is also connected to the E1 / T1 converter card 40. T1 trunk card connection line connectors 42a and 42b are provided at positions corresponding to the line connectors 22a and 22b.

In addition, a first terminal extracted from the T1 trunk card 20 is provided at a terminal of Tx-t in and Tx-r in of the T1 trunk card connection line connector 42 installed on the E1 / T1 converter card 40. The transformer 44 is mounted, and at the rear end of the first transformer 44, the trunk signal of the T1 input transformer 46 and the T1 method for the impedance matching and the absolute level of the signal potential are converted into the E1 method or the reverse conversion process. The T1 trunk card connection connector 42a is connected via a T1 / E1 conversion unit 48 for executing the above, and an E1 output transformer 50 for securing the absolute level of impedance matching and signal potential.

In addition, a second transformer extracted from the T1 trunk card 20 is connected to the terminals of Rx-t out and Rx-r out of the T1 trunk card connection connector 42b provided on the E1 / T1 converter card 40. 52 is mounted to the T1 trunk card connector 42b via a T1 output transformer 54, the T1 / E1 converter 54 and an E1 input transformer 56 at the rear end of the first transformer 52. ) Rx-tip terminal and Rx-ring terminal are connected.

Accordingly, the T1 trunk signal Tx-t / Tx-r input to the T1 trunk card 20 is received from the line connector 22a for connecting the E1 / T1 converter card provided on the trunk card 20. The DC component is removed from the first transformer 44 via the T1 trunk card connection line connector 42a and applied to the T1 / E1 converter 48 through the T1 input transformer 46.

The trunk signal converted by the T1 / E1 converter 48 into the E1 method is transmitted to the Tx-tip terminal and the Tx-ring terminal of the T1 trunk card connection line connector 42a via the E1 output transformer 50. After being applied, the line connector 22a on the T1 trunk card 20 is outputted to the backplane connector 30.

On the other hand, when converting the trunk signal of the E1 method input from the backplane connector 30 into the trunk signal of the T1 method, the terminal connected to the Rx-tip / Rx-ring terminal of the backplane connector 30 is used. T1 trunk card connection line connector 42b and E1 input provided on the E1 / T1 converter card 40 via the Rx-tip / Rx-ring terminal of the line connector 22b on the T1 trunk card 20 The transformer 56 is sequentially applied to the T1 / E1 conversion unit 48 to convert the trunk signal of the T1 method, and the trunk signal of the T1 method is converted into the T1 output transformer 54. After the DC component is removed while passing through the transformer 52, the terminals of Rx-t out and Rx-r out of the line connector 42b for connecting the T1 trunk card installed on the E1 / T1 converter card 40 and the Through the Rx-t out / Rx-r out terminal of the line connector 22b of the T1 trunk card 20 to the T1 trunk card 20 side. It is presented a month.

In addition, the E1 / T1 converter card 40 coupled to the piggyback method on the T1 trunk card 20 according to the present invention is required to supply the operating power, typically T1 trunk card 20 Bypass capacitors 202a to 202n for stabilizing voltage while correspondingly removing the ripple component from a power supply Vcc externally applied to the plurality of TTL IC elements 200a to 200n mounted on the bar. In the present invention, a predetermined number (preferably six) of the bypass capacitors 202a to 202n installed on the T1 trunk card 20 is extracted, and the extracted position is schematically shown in FIG. 4B. As shown in the drawing, power connectors 204a to 204n are installed.

Correspondingly, on the E1 / T1 trunk card 40 mounted in the piggyback form on the T1 trunk card 20, power connectors 402a to 402n are provided corresponding to the power connector 204, and the power supply is provided. At a rear end of the connectors 402a to 402n, a predetermined number of bypass capacitors 404a to 404n extracted from the T1 trunk card 20 are arranged.

According to such a power application method, it is possible to apply operating power to the E1 / T1 converter card 40 even in the state where the mechanical change of the T1 trunk card 20 and the backplane connector 30 is excluded. In addition, by placing the bypass capacitors 404a to 404n extracted from the T1 trunk card 20 in the E1 / T1 converter card 40, the power connector of the E1 / T1 converter card 40 ( When 402a to 404n are combined with the power connectors 204a to 204n of the T1 trunk card 20, the power stabilization function of the bypass capacitors 404a to 404n is the T1 trunk card 20 and the E1 / T1 converter card ( 40 is simultaneously achieved for ICs 200a to 200n; 400a to 400n.

5 is a schematic perspective view illustrating an actual mounting state of the E1 / T1 converter card 40 by the piggyback method on the T1 trunk card 20. As shown in FIG. Line connectors 22a and 22b for connecting the E1 / T1 converter card and power connectors 204a to 204n for exchanging trunk signals are provided, and corresponding T1 trunk cards (E1 / T1 converter card 40) are provided on the corresponding E1 / T1 converter cards 40. T1 trunk card connection line connectors 42a and 42b and power connectors 402a to 402n are installed in correspondence with the line connectors 22a and 22b and the power connectors 204a to 204n on the E1 / T1 converter card on FIG. 20). By the combination of such a connector, the piggyback type mounting of the E1 / T1 converter card 40 is possible on the T1 trunk card 20.

Here, in order to mount the E1 / T1 converter card 40 more firmly, a plurality of screw holes 208 are formed on the front panel 206 of the T1 trunk card 20 while the E1 / T1 converter card ( It is also preferable to introduce a system in which a plurality of screw holes 408 are formed on the flange panel 406 of the 40 and mutually screwed together.

On the other hand, the present invention is not limited to the above examples and various changes and modifications are possible without departing from the technical gist and point of the invention. That is, if necessary, the E1 / T1 converter card may be changed to a structure in which the E1 / T1 converter card is mounted in the same or similar manner on the E1 trunk card. In addition, the above-described line connectors 22a, 22b; 42a, 42b and power connectors 204a to 204n; 402a to 402n may also be designed in a single connector structure.

As described above, according to the mounting structure of the heterogeneous trunk signal compatible converter card according to the present invention, it is possible to piggyback on the T1 trunk card without changing the structural design of the T1 trunk card and the backplane connector mounted on the exchanger. The E1 / T1 converter card can be mounted, thereby enabling additional installation of the E1 / T1 converter card.

Claims (3)

In an exchange where a trunk card for relaying a North American (T1) trunk signal and a European (E1) trunk signal is relayed to the backplane connector, A line connector is installed on the trunk card, and a line connector is also installed on the E1 / T1 trunk card corresponding to the line connector. A power connector is installed on the trunk card, and a power connector installed on the E1 / T1 converter card is installed corresponding to the power connector. Heterogeneous trunk signal characterized in that the E1 / T1 connector card is coupled on the trunk card by the mutual coupling of the line connector and the power connector and is interposed between the trunk card and the backplane connector signalically. Mounting structure of compatible converter card. The line connector of claim 1, wherein the line connector on the trunk card is provided at the extraction position of the first and second transformers provided on the trunk card to remove the direct current component of the voice signal of the trunk signal, and the first and second transformers. The structure of the heterogeneous trunk signal compatible converter card in the exchanger, characterized in that is installed at the rear end of the line connector of the E1 / T1 converter card. The power connector of the trunk card is installed at a position of extraction of a voltage stabilization bypass capacitor installed in the trunk card, and the extracted bypass capacitor is a rear end of the power connector of the E1 / T1 converter card. The structure of the heterogeneous trunk signal compatible converter card in the exchange, characterized in that connected in parallel to the trunk card and the E1 / T1 converter card.