RU2041569C1 - Commutational device - Google Patents

Abstract

FIELD: automatic communication. SUBSTANCE: for reduction of number of internal interlocks and dimensions of equipment commutational device is inserted with additional commutation unit 3 and with its couplings to commutation units 1(1)-1n and 2(1)-2n of first and second links. Connections 1n and 2n prevent blocking of subscribers integrated in it, that is makes them priority subscribers. EFFECT: enhanced operational efficiency. 1 dwg

Description

 The invention relates to automatic switching and can be used to build quasi-electronic nodes of automatic switching of small and medium capacity.

Known switching devices containing K ₁ switching blocks in the first link, each of which has n ₁ inputs and m ₁ outputs, and K ₂ switching blocks in the second link, each of which contains n ₂ inputs and m ₂ outputs, and the outputs of each block switching of the first link are connected to the corresponding inputs of the corresponding switching blocks of the second link (it is assumed that K ₁ m ₁ xK ₂ n ₂ ) (see Livshits BS and other Development of systems for automatic switching of channels. M. Svyaz, 1976, p. 12-14).

 However, such switching devices allow you to simultaneously establish only one connection between any pair of switching blocks of the first and second link, which makes it impossible for another connection of these switches.

 Known three-link switching devices containing three switching links, the switching units of which are connected in series with the possibility of access of each switching unit of the first link through the switching units of the second link to any switching unit of the third link. Moreover, link switching units usually have an equal number of inputs and outputs (nxn). (See MT Hills. Switching Principles in Telecommunications. M. Radio and Communications 1984, p. 158-160).

 These switching devices reduce internal blockages, but the volume of equipment increases significantly.

 In addition, all subscriber lines are on an equal footing, which does not allow organizing priority communication between the respective groups of subscribers (military, commercial, government communications, etc.).

 The proposed device in comparison with a two-link circuit reduces the number of internal locks, and compared with a three-link circuit reduces the amount of equipment. In addition, the functionality of the device is expanded in terms of providing priority communication.

 Figure 1 presents the structural electrical diagram of the switching device.

The switching device contains n switching blocks of the first link 1 ₁ -1 _n , n switching blocks of the second link 2 ₁ -2 _n , an additional switching block 3, while the switching blocks of the first and second links, as well as the additional switching block contain n inputs and n outputs .

 The switching device operates as follows.

If it is necessary to carry out communication, for example, between the switching unit 1 _{2 of the} first link and the switching unit 2 _{n-1 of the} second link from the n-1-th output of the switching block 1 _{2, they} are connected to the second input 2 of the _n-1- th switching block of the second link. If you need another connection between these blocks, then from the n-th output 1 of the _2nd switching block of the first link, through the second input of the additional switching block 3 and through its n-1st output, connect to the n-th input 2 _n-1 2nd switching unit of the second link.

Thus, at the same time, two connections are made between these blocks with a minimum amount of equipment. Priority subscribers are included in the nth switching unit of the first link, and at the same time they can be provided with n-1 connections in priority directions through the nth switching unit of the second link. If it is necessary to connect the priority subscriber to the non-priority, the connection is made through the nth input of the additional switching unit 3, through which it is also possible to connect the 1 _nth switching unit of the first link to the 2nth switching unit of the second link. The indicated scheme allows connecting priority subscribers without blocking.

Claims (1)

 COMMUTATION DEVICE containing n switching blocks of the first link and n switching blocks of the second link, the switching blocks of the first and second links containing n inputs and n outputs, while n 1 outputs of the i-th switching block of the first link are connected to the i-th switching inputs units of the second link (where i 1, 2 n 1), characterized in that an additional switching unit is introduced, the inputs of which are connected respectively to the n-th inputs of the switching units of the first link, and the outputs of the additional switching unit are connected inens with n-th inputs of the switching blocks of the second link, while n 1 outputs of the n-th switching block of the first link are connected respectively to n 1 inputs of the n-th switching block of the second link.