RU2041567C1 - Commutation system - Google Patents

Abstract

FIELD: telephony. SUBSTANCE: additional commutation units 3 and units 4 to store and generate information and their couplings with commutation units of first link 1(1)-1(n) and second link 2(1)-2(n) are inserted into units of incoming 5(1)-5(m) and outgoing 6(1)-6(m) communication to reduce number of interlocks of regular subscribers and to provide privileged subscribers with low-interlocked communication with extra services. EFFECT: improved operational efficiency and reliability. 1 dwg

Description

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

Known switching systems containing m nodes of incoming communication connected to m nodes of outgoing communication, while each node of incoming and outgoing communication contains K ₁ blocks of switching in the first link with n ₁ inputs and l ₁ outputs and K ₂ switching blocks in the second link with n ₂ inputs and l ₂ outputs, and the outputs of each switching unit of the first link are connected to the corresponding inputs of the switching units of the second link (it is assumed that K ₁ l ₁ = K ₂ n ₂ ).

 However, this switching system does not provide sufficient bandwidth due to locks in the nodes of the incoming and outgoing communications, since only one communication is performed between any pair of switching blocks of the first and second link. In addition, all subscribers are in the same position; there is no possibility of a non-blocking connection of priority subscribers (military, government, businessmen, etc.), as well as additional types of services (access to the data bank).

 The effect of the proposal is to reduce blockages for ordinary subscribers and the provision of additional types of services to privileged (priority) subscribers with the provision of low-blocking connections.

 In FIG. 1 shows a functional electrical diagram of a switching system.

The switching system 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, a storage and output unit 4 in each node of the incoming communication 5 ₁ -5 _m and outgoing communication 6 ₁ -6 _m . In this case, the switching units (and additional) have n inputs and n outputs.

 The switching system operates as follows.

A call coming from a regular subscriber is received at the corresponding switching unit of the first link 1 ₁ -1 _{n of the} corresponding incoming communication node 5 ₁ -5 _m . From the output of this switching unit of the first link, a connection is made with the required switching unit of the second link 2 ₁ -2 _n . If you want to make another connection between these units, it is made through an additional switching unit. Thus, the throughput for ordinary subscribers is doubled. Privileged subscribers are included in the nth switching unit of the first link. To communicate with other subscribers in the same category, nl-1 lines are allocated connecting the n-th switching blocks of the first and second links 1 _n -2 _n . Thus, blocking for privileged subscribers is unlikely. In addition, these subscribers can communicate with ordinary subscribers through an additional switching unit 3.

Preferred subscribers have an additional service, which consists in the fact that they can connect to the information storage and delivery unit 4 (database) and record and receive information from it. At the same time, l privileged subscribers can use this service. If the necessary information is not available in the storage and delivery unit 4 of this incoming communication node 5 ₁ -5 _m , it is possible to use the information storage and delivery unit 4 of any outgoing communication node 6 ₁ -6 _m .

 Thus, with a slight increase in the volume of switching equipment, a reduction in interlocks is achieved due to the busyness of internal lines of nodes.

Claims (1)

 COMMUTATION SYSTEM containing m nodes of incoming communication, the outputs of which are connected to the corresponding inputs of m nodes of outgoing communication, while each node of incoming and outgoing communication contains n switching blocks of the first link and n switching blocks of the second link, with n 1 outputs of the i-th switching block the first link (where i 1, 2, n 1) are connected to the i-th inputs of n 1 switching units of the second link, characterized in that an additional switching unit and an information storage and delivery unit are introduced into each node of the incoming and outgoing communications, while n block outputs in the switching of the first link are connected to the corresponding inputs of the additional switching unit, the outputs of which are connected to the n-th inputs of the switching blocks of the second, respectively, nl 1 outputs of the n-th switching block of the first link are connected to nl-1 inputs of the n-th switching block of the second link, l whose inputs are connected through the information storage and output unit to the l inputs of the nth switching unit of the first link of incoming and outgoing communication nodes (where l is the number of inputs and outputs of the information storage and output unit).