RU2096921C1 - Digital phone exchange system with group conference mode - Google Patents

Abstract

FIELD: telephone communication, in particular, office exchange systems. SUBSTANCE: device has input and output memory units, control unit and scanning unit. In addition device has two-stage unit of adders, service code detection unit, adder state detection unit, calling numbers state detection unit, unit which detects number and bit-length of adders, generator of re- commutation signals. This results in possibility for each user to participate simultaneously in several conferences: in one actively (speaking and listening) and in others passively (just listening). Preferably invention is implemented in software packages if specific element base is provided in switching elements. EFFECT: increased functional capabilities. 1 dwg

Description

 The invention relates to telephony, in particular to programmable office telephone exchanges.

 Known devices for switching digital channels, containing a control unit connected through an address distributor with a block of incoming storage devices and a block of outgoing storage devices, as well as spatial switching blocks. (See SU, Copyright Certificate N 768002, CL H 04 M 3/00, 1980).

 However, these devices do not allow for the organization of conference calls of subscribers and the presence of a spatial switch does not allow to realize the device in digital form.

 The closest in technical essence to the proposed invention is a multicast communication device containing an input storage unit, a scanning unit, a control unit, linear (subscriber) sets, a memory unit of linear sets and a memory block for multicast communications. (See SU, Copyright Certificate N 1131041, CL H 04 M 3/56, 1984).

 The known device allows a subscriber to participate in a conference call, however, with only one group of subscribers. Participation in conferences with two or more groups of subscribers cannot be ensured, since the transfer of additional information from the subscriber during the conference call and its processing is not provided.

 Achievable technical result consists in providing subscribers with additional services consisting in providing the ability to conduct several conference calls simultaneously. In one conference, the subscriber participates actively speaks and listens, and in other conference calls passively - only listens.

 The drawing shows a structural electrical diagram of a digital telephone exchange with group conference calling. A digital conference station with group conference calls contains n subscriber sets 1.i 1.n, an input storage unit 2 with n cells, an output storage unit 3 with n cells, a two-stage summing unit 4, a control unit 5, a scanning unit 6, a determining unit the service code 7, the determinant of the state of the called subscribers 8, the unit for determining the state of the adders 9, the signal generator of the switching of the adders 10 and the unit for determining the number and dimension of the adders 11.

A digital telephone exchange with group conference calls works as follows:
To provide conference calls, the subscriber uses the adders of one stage of the summing unit 4. The subscriber sets are scanned by the scanning unit 6 and the change in their state in which the information is entered is sent to the control unit 5, which commutes the cells of the input storage unit to the adders of one stage of the summing unit 4. Thus, several groups of subscribers can independently organize conference calls.

 To organize a group conference call while a subscriber conducts one conference call (with one group of subscribers), the subscriber dials an access code to other conference calls. This code is read from the subscriber set 1.i 1.n by the scanning unit 6 and is sent to the service code determination unit 7, which determines the type of service required and whether such a service is allowed to this subscriber. If the decoding result is positive, the information is transmitted to the called party 8 status determiner, which is connected to the control unit 5 and from which information is received whether the called party is busy with the conference connection. This prevents eavesdropping on someone else’s conversations. Further, if the information is positive, the signal is sent to the adder status determination unit 9, in which there is information from the control unit 5 about the status and the adders (outputs) of the adders of the two-stage summation unit 4. This information is transmitted to the adder reconfiguration unit 10, which, based on this information and information about the number and dimension of adders required for this service, coming from the unit for determining the number and dimension of adders 11, generates a signal for switching over the adder ov. Information about this, like all information about the state of station elements, is recorded in control unit 5, as in any electronic station. As a result, the subscriber participating in one meeting (conference call) has the opportunity to listen to other meetings (with a reduced level).

 It is preferable to carry out the invention by a software method, which is possible if there is a certain element base for the construction of switching nodes.

 The additional service of participating in several meetings is necessary when managing large facilities and saves time.

Claims (1)

 A digital telephone exchange with group conference communication, containing n subscriber sets connected to the input storage unit, an output storage unit, a scanning unit, the inputs of which are connected to the outputs of the subscriber sets, and the output is connected to the input of the control unit, the outputs of which are connected to the control inputs of the input a storage unit and an output storage unit, characterized in that a two-stage summing unit, a unit for determining the number and dimension of adders, as well as sequentially with a single unit for determining a service code, a determinant of the state of the called subscribers, a unit for determining the state of the adders and a shaper of signals for switching commutators, the output of which is connected to an additional input of a control unit connected to a two-stage block of adders, a unit for determining the state of the adders and a determinant of status of the called subscribers, while the output of the block the scan is connected to the input of the service code determination unit, which is connected to the adder number and dimension determination unit, a signal generator nennogo overcommutation switches, and an input storage unit and an output unit connected to the storage unit two-stage adders.