JP2591135B2 - Conference equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication path in a telephone exchange by a switching system using a self-routing communication path.

2. Description of the Related Art In general, a conference device in a telephone exchange is a time-division switching system, and uses a conference circuit as shown in FIG. 2, for example (IEICE published on March 30, 1988). 2145 of the 29th section of the Electronic Information and Communication Handbook
page). This conference circuit 11 is a time-division exchange which handles 64 Kbps PCM voice information which is 8-bit coded at a period of 125 μs.
After being time-division multiplexed and input at a period and subjected to necessary operations, n pieces of operation call information 13 are sequentially transmitted to one output line.
It is configured to be sent to one conference participant at a period of 125 μs.

[Problems to be solved by the invention]

However, since such a conventional conference apparatus is premised on use in a time-division exchange, it cannot be used as it is in an exchange method using a self-routing communication path as a communication path by packetizing communication information. .

[Means for solving the problem]

The present invention provides a conference apparatus in which a time-division switch can be applied to a switching system using a self-routing communication path, so that the header information added to the outgoing line of the upstream communication path of the self-routing communication path and added to the communication information Participant identification self-routing switch for specifying an outgoing line to output the call information based on, and outgoing line specified by the conference participant identifying soothing switch provided for each outgoing line of the upward communication path. A memory circuit for storing the call information output to the memory circuit; a count number for outputting a clock signal for sequentially reading out the call information stored in the memory circuit in a time-sequential manner at a predetermined cycle; A conference circuit (time-division exchange) that inputs the read call information, performs a specific operation, and outputs the calculated call information in a time-series manner, and a processing circuit obtained in a time-series manner. A header table for adding conference participant designation information indicating a subscriber terminal number of a downlink channel of the self-routing channel connected to the output line of the conference circuit to the information and sending the information as an output packet to the self-routing channel; It is characterized by having.

[Action]

As a result, in the self-routing communication path, the communication information is packetized and handled, and the predetermined operation is performed by the time-division exchange. Therefore, the exchange method by the self-routing communication path using the existing time-division exchange is possible. Become.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a block diagram showing one embodiment of the present invention.
In the telephone exchange according to the switching system using the self-routing communication path, the self-routing communication path 14 accommodates n conference participants, and the incoming and outgoing lines of the upward communication path 15 on the trunk side of the self-routing communication path 14 are connected. The outgoing line of the communication path 16 is connected to the conference device 17. In the conference device 17, the outgoing line of the upward communication line 15 of the self-routing communication path 14 is connected to the conference participant identification self-routing switch 18. , Each having an m-byte memory circuit 19−
1 to 19-P are connected. Memory circuits 19-1 to 19-
The P read information input lines are connected to P output lines of the counting circuit 20 which operates with a clock having a cycle of 125 μs × (1 / P). The P output lines of each of the memory circuits 19-1 to 19-P are connected to a read bus 21, and the read bus 21 is connected to an input line of the known conference circuit 11. The output line of the conference circuit 11 is connected to a transmission bus 22 and has a configuration in which a header according to a header table 23 can be added. After passing through this configuration, the output packet is connected to the input line of the self-routing communication path 14.

Next, the operation of the thus configured conference apparatus of the present invention will be described. Uplink communication path of self-routing communication path 14
On the subscriber side of the communication path 15 and the downlink communication path 16, n conference participants are connected. The uplink communication information of the n persons is in the form of a packet having, as header information, the output terminal information of the uplink communication path 15 for specifying the output terminal of the switch and the conference participant identification information.

In general, a self-routing switch such as a batcher banyan network is used for the upstream communication path 15 and the downstream communication path 16 of the self-routing communication path 14. As the header information of the input information of the batcher banyan network, the outgoing terminal number of the self-routing communication path is used, the switch uses the outgoing terminal number of this header information, and the switch uses the outgoing terminal number of this header information. It is known that it is a self-routing communication path connected autonomously (Nikkei Electronics No. 438, published on January 11, 1988, page 133).

In the present invention, the n-way uplink communication information has outgoing terminal information of the uplink communication path 15 and conference participant identification information as header information of an input packet. Therefore, the uplink call information of the n conference participants is input to the conference device 17. In the conference device 17, n pieces of uplink communication information are input to the identification self-routing switch 18 by the conference participants. The n-way uplink call information has conference participant identification information as header information, and the conference participant identification self-routing switch 18 autonomously connects to the outgoing line terminal by the header information such as the aforementioned batcherbanyan network. Connect call information.

As a result, the conference participant identification information indicated by the respective header information of the n-way uplink call information corresponds to the output terminal number of the self-routing switch 18. Each of them is stored in n memory circuits for n conference participants among P memory circuits 19-1 to 19-P connected to the output line of the conference participant identification self-routing switch 18. .

On the other hand, the P output lines of the counting circuit 20 operating with a clock having a period of 125 μs × (1 / P) are connected to the read information input lines of the P memory circuits 19-1 to 19-P, respectively. .
Each of the n pieces of upward communication information stored in the P memory circuits 19-1 to 19-P is sequentially transmitted to the memory read bus 21 by the P output lines of the counting circuit 20. The known conference circuit 11 shown in FIG. 2 is connected to the memory read bus 21.

The conference circuit 11 outputs n pieces of calculated call information that has been subjected to a predetermined calculation so that the n pieces of uplink call information become the call information to be output to each of the n meeting participants. The output line of the conference circuit 11 is connected to a transmission bus 22, and n pieces of operation call information are sequentially transmitted within 125 μs × (1 / P) time,
It is repeatedly transmitted to the transmission bus 22 at a period of 125 μs × (1 / P).

A header table 23 having header information indicating the subscriber terminal numbers of the downlink communication path 16 for the number n of conference participants is transmitted by the transmission bus.
The header table 23 is connected to the header table 22 and sequentially adds the header information described in the header table 23 to the n output operation call information of the conference circuit 11 corresponding to the n conference participants. The header information is information indicating the terminal number of the subscriber side of the down-directional communication path 16 of the self-routing communication path 14 of the n conference participants, and the transmission bus provided with the n headers.
Since the calculated call information on 22 is input to the incoming line of the downstream communication path 16 of the self-routing communication path 14, the autonomous operation based on the header information causes the n pieces of calculation call information to be transmitted down the self-routing communication path 14. The signal is sent out to the downstream communication path 16 of the n conference participants connected to the subscriber side terminal of the direction communication path 16.

As described above, according to the present invention, as the header information of the input packet, information including the outgoing call path outgoing terminal information of the self-routing call path and the conference participant identification information is provided. The conference device 17 according to the present invention is connected to one outgoing line of the upward communication path 15 of the self-routing communication path 14 and one incoming line of the downward communication path. A conference participant identification self-routing switch 18 is provided at a portion of the conference device 17 connected to the outgoing line of the upward communication path 15 of the self-routing communication path 14, and a first memory circuit 19-1 to a P-th memory The circuit 19-P includes P m-byte memory circuits, and includes a counting circuit 20 that operates with a clock having a period of 125 μs × (1 / P).
Is provided with a designation information input line for designating the number of conference participants n (n ≦ P). The counting circuit 20 sequentially sends out the read information from the memory circuits 19-1 to 19-N.
Sent within the time of μs × (1 / P), 125μs (1 / P)
It is sent repeatedly in a cycle. That is, n memory circuits
The stored information 19-1 to 19-n is sent to the memory read bus 21 by the read information. Then, the conference circuit 11 is connected to the read bus 21.
Of the conference circuit 11 is connected to the output bus 22.
And a header table is connected to the transmission bus, and the header table 25 is provided with a designation input line for designating the number of conference participants n (n ≦ P). Thereby, the conference circuit 11
Are sequentially transmitted to the transmission bus within 125 μs × (1 / P) time. The output packet is repeatedly transmitted to the transmission bus 22 at a period of 125 μs × (1 / P) and provided with a header stored in the header table 23 for each of the n operation results. Send out at the entrance of the road.

〔The invention's effect〕

As described above, according to the present invention, in a switching system using a self-routing channel that operates autonomously by header information that specifies an outgoing terminal number, the outgoing line information of the self-routing channel and the identification of the conference participant. Information as header information, a conference device is provided with an m-byte memory circuit corresponding to a conference participant, and a conference participant self-routing switch is provided which uses conference participant identification information as autonomous operation information. Therefore, the known conference circuit can be used as a conference apparatus for a switching system using a self-routing communication path. As described above, the switching conference device using the self-routing communication path can be realized by adding a small number of circuits to the known conference circuit.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing a conference circuit. 11… Conference circuit, 12… Call information, 13… Computed call information, 14… Self-routing call path, 15… Uplink call path, 16… Downlink call path, 17… Conference equipment, 18 ... Self-routing switch, 19 ... Memory circuit, 20 ... Counter circuit, 21 ... Read bus, 22 ... Sending bus, 23 ... Header table.

Claims (1)

(57) [Claims] 1. A call information having a header information comprising conference participant identification information and upstream outgoing terminal information is inputted, and a down call path of a self-routing call path connected to an outgoing line of the conference circuit is inputted. In a conference device in a telephone exchange using a self-routing communication path that outputs operation call information having conference participant designation information indicating a subscriber side terminal number, the self-routing communication path is connected to an outgoing line of an upward communication path. Based on the header information, a conference participant identification self-routing switch for specifying an outgoing line from which the call information is to be output, and the conference participant identifying self switch provided corresponding to each outgoing line of the upstream communication path. A memory circuit for storing call information output to the outgoing line specified by the routing switch; and a predetermined period of time for the call information stored in the memory circuit. A counting circuit that outputs a clock signal for sequentially reading out the call information in a time series; a conference circuit that receives the call information read by the count circuit, performs a predetermined operation, and outputs the calculated call information in a time series manner And a header table having header information indicating a subscriber terminal number of a downstream communication path of the self-routing communication path specified by the conference participant designation information in the calculated communication information obtained in time series. A conference device characterized by the above-mentioned.