CS262530B1 - Four-exits gearboxes are connected to the PBX on the exits of the ee busbar group - Google Patents

Abstract

The solution concerns the connection of the transmission fields in the telephone exchange at the outputs of a group of busbars, each of which has four outputs. In the basic connection of a transmission field with at least five busbars, the number of devices connected to the transmission field is equal to the number of busbars in the transmission field. The devices are connected to the first output of all busbars and the other busbar outputs are connected to these devices in cyclic tandems with four outputs and three jumpers. In the basic connection of a transmission field with four busbars, eight devices are connected to the first and second outputs of all busbars. The other busbar outputs are connected to these devices in cyclic tandems. The connection of a transmission field with the same number of busbars but with a larger number of connected devices is derived from the basic connection. The jumpers in the tandems are gradually omitted from the basic connection of the transmission field and another device is connected to the output, which is the beginning of the separate part of the tandem.

Description

The invention relates to the connection of transmission fields in a telephone exchange at the outlets of a group of busbars comprising at least four busbars each having four exits.

In a PABX, some devices are centralized into a group of devices and connect via a group of busbars to other PABX devices when their collaboration is needed to establish connections in the PABX. The busbar group has entrances and exits. Other PBX devices are permanently connected to the inputs. At the exits, all devices in the group are permanently connected in the transmission field. If necessary, the busbar looks for a free device connected to one of its exits and connects the device to the input after which the device connection request came.

The busbar searches for a free device, for example, by examining all of its exits and testing on each of them whether a free device is connected to the east, more often searching the exit with a smaller serial number in the busbar. This implies that exits with a smaller serial number in the busbar are more frequently occupied than exits with a larger serial number.

The number of busbar group exits is generally greater than the number of devices connected.

Therefore, on average, several busbar group exits are permanently connected to one device. This connection takes place in the transmission field. Each busbar has the same number of exits in the transmission field. The number of busbars in the transmission field and the number of exits from one busbar indicate the size of the transmission field.

The transmission field contains busbar group exits and jumpers between the exits.

The jumper is the wire connection of the two exits of the transmission field. The jumpers connected in series consist of tandem. Tandem has a start in the east, where the device is connected. The gearbox is mounted on the side of the intermediate distributor fitted with vertical pointed tapes. The busbar group exits are connected to the tips. Gearbox jumpers are mounted between the tips. At some of these peaks, the device is permanently connected.

The following demands are placed on a good transmission field:

- good throughput for equipment connection requirements as the ability to ensure as many free devices as possible are provided at the exits of each busbar,

- easy design in projection,

- regular involvement,

- economy in material consumption,

- the possibility of relatively simple changes to the transmission field without impairing its good operational throughput.

Good throughput is the most important feature of the transmission field. Due to the above described uneven occupancy of individual busbars exits in the transmission field, a suitable escalation is a decisive factor in the good operational throughput of the transmission field, in that the more traffic-exiting exits are connected individually to the device or less exits less loaded. The operational throughput of the transmission field also improves the uniform interconnection of the individual busbars.

The transmission field is easier to design if a simple design methodology and various graphical aids are developed. Regular wiring of the transmission field is beneficial for installation and maintenance work, as it facilitates schematic orientation and realization of the transmission field. Workers are better remembered and do not need to consult the documentation frequently. The transmission field is economical in material consumption if the sum of the lengths of all jumpers in the transmission field is as small as possible. Easily making changes to the transmission field is a very important requirement for the transmission field, since these changes are made quite often due to changes in the telephone network.

It is desirable that as many jumpers remain as possible when changing the transmission field.

The design of the transmission field should make it clear that the jumpers are mounted in such a way that the jumpers do not interfere with the removal of some of them in order to increase the number of devices in the group. Changes in the transmission field must not reduce its throughput. These requirements for the transmission field contradict each other, so the design of the transmission field is always a compromise.

The main disadvantages of the existing transmission fields are that they were designed individually only according to their parameters - the number of busbars, the number of busbars and the number of devices in the group. The transmission fields of similar or even identical parameters often had significantly different connections. To ensure good operational throughput of the transmission field, the design should also respect the framework principles of gradation and uniformity in the interconnection of the individual busbars with each other. However, the design was not examined by computer modeling, so the actual throughput of the proposed transmission field was only hypothetical. Gearbox design was laborious. Although designers were careful about the wiring of the gearbox, the design was relatively easy to make in the future, as the design field was not up to date. It was difficult to control the economy in material consumption. The mounting of the gearbox on the intermediate switchgear was complicated by the fact that each gearbox had a different connection and the order of mounting the jumpers in the gearbox was not prescribed with respect to the changes being made. Similar difficulties were encountered in the maintenance of operated transmission fields in the control panel. Repeated changes in the operated transmission field generally led to a gradual deterioration in its operational throughput, as it was not viable to remodel the entire transmission field due to a small change in the group of devices.

The above-mentioned disadvantages are overcome by the connection of the transmission fields according to the invention, which consists in that in a transmission field with at least five busbars to which a number of devices equal to the number of busbars in the transmission field is connected, the other gearbox exits are connected to these devices in a number of tandem busbars starting at the first exit of all busbars and repeating cyclically on individual busbars, the last busbars in the gearbox being considered adjacent to the first busbars. In a four-busbar transmission array with eight devices connected, four devices are connected to the first exit of all busbars and the remaining four devices are connected to the second exit of all busbars and the third to fourth exit of all busbars are connected to these devices in four identical tandems starting at the second exit of all busbars and repeating cyclically on individual busbars, the last busbar in the transmission field being considered adjacent to the first busbar.

According to the invention, a transmission array with at least five busbars with a number of devices connected equal to the number of busbars in a transmission array and a transmission array with four busbars with eight connected devices are the basic circuitry from which connected devices. This derivation consists in the fact that with increasing number of devices connected to the transmission field, the first jumper of all tandems in the transmission field is gradually omitted from the basic circuit, then the second jumper of all tandems to the third jumper of all tandems in the transmission field. Jumpers with the same serial number for different tandems are omitted evenly across the transmission field. One device is connected to the east, which is the beginning of a separate part of the tandem.

The main advantages of the invention are that the connection of the transmission fields according to the invention comprises most of the transmission fields on a group of busbars of the type mentioned above, which may occur in practice. Each transmission field is well operable, which is achieved by suitable gradation and relatively uniform interconnection of the individual busbars with each other. The gearboxes have a regular and well-arranged wiring that facilitates assembly work and maintenance. They are economical in material consumption.

The even greater effect of engaging the transmission fields according to the invention is achieved by the fact that all transmission fields form a uniform wiring system. They are similar to each other, so that the change of one transmission field to another is made with a minimum of changes in the wiring of the existing transmission field and without a noticeable change in good throughput. The assembly work in case of changes in the transmission field is also facilitated by the fact that in the transmission fields according to the invention it is possible to prescribe the assembly order of individual jumpers, which is the opposite order of their possible omission while increasing the number of devices connected to the transmission field. Cyclicity in the connection of the transmission fields according to the invention facilitates a change in the number of busbars in the transmission field - the jumpers are removed only between the first and last busbars in the transmission field and the added busbars are connected to the cyclic connection of the other jumpers.

All transmission fields can be pre-processed into a catalog from which the designer traces his particular transmission field into the project. The catalog simplifies the transmission field documentation. The catalog will enable machine processing of the design of the gearbox as well as the elaboration of its laborious documentation on the computer, flawlessly and in the final graphic design into the project. When you develop your gearbox documentation, your computer will make it easier to extend this documentation with additional information that speeds up assembly and maintenance work. Administrative and researchers will find in the catalog, for study purposes, the involvement of transmission fields that have not yet been designed.

In the following, the invention is explained in detail by way of example embodiments in conjunction with the drawing. Fig. 1 is a block drawing of a group of busbars with inputs, busbars, outputs, gearbox, devices.

Fig. 2 shows schematically the exits of the transmission field with five busbars. The busbar exits are indicated by a vertical column of reference numbers on the left. The individual busbars are marked with reference numbers in the line above the figure. FIG. 2 also depicts a first tandem in a transmission array with at least five busbars starting at the first exit of the first busbar where the device is connected thereto. This exit is indicated in FIG. 2 by an arrow. FIG. 3 schematically shows a five-busbar transmission field to which five devices are connected. The transmission field comprises five tandems as shown in FIG. 2. The symbolism used is the same as that of FIG. 2. FIG. The symbolism used is the same as that of FIG. 2. FIG. The symbolism is the same as in FIG. 2. Also shown in FIG. 5 is a first tandem in a four-bus gearbox starting at the second exit of the second busbar where the device is connected thereto. FIG. 6 is a schematic representation of a transmission box with four busbars to which eight devices are connected. The transmission field comprises four tandems according to Fig. 5. The symbolism is the same as in Fig. 2.

The five-busbar transmission field (Fig. 3), to which five devices are connected, is connected using five identical tandems that are cyclically repeated over the busbars. Each tandem connects the four exits of the transmission field with three jumpers. It starts at the first exit 6 of the respective busbar where the device is connected to it. By describing the connection of the first tandem in the transmission field, which begins at the first exit 6 of the first busbar 16, the connection of the entire transmission field in FIG. 3 will be described.

The first tandem of the transmission field in FIG. 3 is shown in FIG. 2. It has a first exit 2 of the first busbar 16 connected via a first jumper 27 to a second exit 2 of the third busbar 18 whose second exit 2 is connected via a second jumper 28 to a third exit 2 of a second busbar. busbar 17, the third outlet 2 of which is connected via the third jumper 29 to the fourth outlet 9 of the fifth busbar 20, where it is terminated by tandem.

The second tandem in the transmission field of FIG. 3 starts at the first exit 8, the second busbar

17 where a device is connected thereto. The second tandem connection is analogous to the first tandem connection described above, except that the busbar serial number of all exits in the tandem is one busbar, except for the fourth exit 2 of the first busbar 16, since in cyclic connection the first busbar 16 is considered following the last, fifth busbar. 20. Similarly, the wiring of all remaining three tandems in the transmission field shown in Figure 3 can be described.

A five-busbar and five-wired transmission array connection is the basic wiring for five-busbars, but with more than five wired devices. One of them is a transmission box with five busbars and thirteen wired devices, shown in Figure 4. In the transmission box, five devices are connected to the first exit 6 of all busbars, as in the basic wiring in Figure 3. The sixth to tenth devices are wired. at the second exit T of all busbars and in all five tandems of the basic wiring (FIG. 3), the first jumper 27 is omitted so that the first exit 6 and the second exit příslušných of the respective busbars are disconnected in all tandems. The remaining eleven to thirteenth devices are each connected to the third exit 8 of the first busbar 20, the third busbar 18, the fifth busbar 60. The second jumper 28 is omitted in the basic wiring tandem (fig. 3) to which the last three devices were connected. In the second tandem, the second exit 2 of the fourth busbar 19 and the third exit of the third busbar 18 are disconnected. The second exit 2 of the first busbar 16 and the third exit 2 of the fifth busbar 20 are disconnected.

The transmission box with four busbars (Fig. 6), to which eight devices are connected, is connected using four identical tandems, which are cyclically repeated over the busbars in the transmission box. Each tandem starts at the second exit T of the respective busbar where the device is connected to it. By describing the engagement of the first tandem in the transmission field, which begins at the second exit 2 of the second busbar 17, all tandems of the quadruple will be described.

The first tandem of the transmission field in FIG. 6 is shown in FIG. 5. It is analogous to the corresponding part of the first tandem in the transmission field with at least five busbars (FIG. 2). It has a second exit 2 of the second busbar 17 connected via a second jumper 36 to a third exit 2 of the first busbar 26 / whose third exit 23 connects via a third jumper 37 to the fourth exit 2 of the fourth busbar 19 where it is terminated by tandem.

The second tandem in the transmission field (FIG. 6) begins at the second exit T_ of the third busbar

18. Its wiring is analogous to the first tandem wiring described above, except that the busbar sequence number of all exits in the tandem is one more busbar, except for Fourth Exit 2 of the first 2® busbar. Similarly, the connection of the two remaining quadruple tandems in the transmission field shown in Fig. 6 can be described.

Wiring with four busbars and eight devices connected is a basic wiring for four busbars, but with more than eight wiring devices.

Claims (5)

OBJECT OF THE INVENTION 1. Connection of transmission fields in a telephone exchange at the exits of a group of busbars with four exits from one busbar, characterized in that in a transmission field with at least five busbars to which a number of devices equal to the number of busbars in the transmission field are connected the first exit (6) of all busbars and the other exits of the transmission field are connected to these devices in a number of busbars identical in tandem, starting at the first exit (6) of all busbars and repeating cyclically on individual busbars. adjacent to the first busbar, and in a four-busbar transmission array where eight devices are connected, four devices are connected to the first exit (6) of all busbars and the remaining four devices are connected to the second exit (7) of all busbars and the third exit (8) to the fourth east d (9) of all busbars are connected to these devices in four identical tandems starting at the second exit (7) of all busbars and repeating cyclically on individual busbars, the last busbars in the transmission field being considered adjacent to the first busbars. 2. Connection according to claim 1, characterized in that in the transmission field with at least five bus bars, the first busbar (6) has a first busbar (16) connected via a first jumper (27) to a second busbar outlet (7) of a third busbar (18). wherein the second exit (7) is connected via a second jumper (28) to the third exit (8) of the second busbar (17), the third exit (8) is connected via a third jumper (29) to the fourth exit (9) of the fifth busbar (20) ), where the first tandem ends. 3. Connection according to Claims 1 and 2, characterized in that devices with a sequence number greater than the number of busbars in the transmission field and not more than twice that number are connected one at a time to the other outlet (7) of the individual busbars. to which the device is connected, the first exit (6) and the second exit (7) of the respective busbars are disconnected by omitting the first jumper (27), the devices having a serial number greater than twice the number of busbars in the transmission field and not more than three times connected one by one to the third exit (8) of individual busbars evenly across the transmission field and in the tandem to which the device is connected, the second exit (7) and the third exit (8) of the respective busbars are disconnected by omitting the second jumper (28) with a number greater than three times the number of busbars in the gearbox and not the sentences more than four times this number are connected one at a time to the Fourth Exit (9) of each busbar evenly across the transmission field and the third exit (8) and Fourth Exit (9) of the respective busbars are disconnected in the tandem to which the device is connected by omitting the third jumper. 29). Connection according to Claim 1, characterized in that, in a four-busbar transmission field with a first tandem, the second exit (7) of the second busbar (17) is connected via a second jumper (36) to the third exit (8) of the first busbar (16). the third exit (8) is connected via a third jumper (37) to the fourth exit (9) of the fourth busbar (19), where the tandem terminates. Wiring according to items 1 and 4, characterized in that the devices with a sequence number greater than eight and not more than twelve are connected one at a time to the third exit (8) of the individual busbars evenly over the transmission field and in tandem to which the device is connected , the second exit (7) and the third exit (8) of the respective busbars are disconnected by omitting the second jumper (36), devices with a sequence number greater than twelve and no more than sixteen are connected one by one to the fourth exit (9) of each busbar evenly the third exit (8) and the fourth exit (9) of the respective busbars are disconnected by omitting the third jumper (37) in the field and in the tandem to which the device is connected.