JPH073991B2 - Photo Information Manual Tandem Relay Method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tandem relay method for photographic information in a storage program type time division private branch exchange, and in particular, it simplifies the program processing procedure by reducing the number of times of call path reconnection. The present invention relates to a photographic information manual tandem relay method using a branch trunk in a time-division exchange suitable for use.

[Background of the Invention]

FIGS. 1 (a) and 1 (b) exemplify a system configuration diagram showing each connection state of a photographic information tandem relay method by manual connection in a conventional time division exchange. In FIGS. 1 (a) and 1 (b), 1 is a relay line such as a dedicated line connected to a photo transmission source,
Reference numeral 2 is a trunk, 3 is a storage program type time division private branch exchange, 4 is a relay stand, 5 is an interface device, 6 is a partner response signal receiving device, 7 is a trunk for another office trunk line such as a branch line, and 8 to 12 are It is a set connection path of the communication network in each connection state.

With this configuration, when an incoming call arrives at the trunk 2 from a photo source connected to the trunk line 1 such as the leased line in FIG. 1 (a), the exchange 3 closes the connection path 8 in the communication network and connects the trunk line. 1 is connected to the relay stand 4. In response to this, the handler of the relay stand 4 finds that the relay connection call is for another station such as a branch office in the photograph, and operates the electronic key of the relay stand 4 to close the connection path 9 so that the other party's response signal receiving device 6 can be operated. While capturing through the interface device 5, the connection path 10 is closed to capture the interface trunk 7 of the other office trunk line such as a branch line, and the other station is activated by voice or dial information. When the partner station learns that it is the photo reception information based on this information, it captures and activates the photo receiver through its own exchange (not shown). When this photographic receiver is activated, it sends out a response signal of the in-band frequency assigned to itself. Then, this response signal is detected by the other party's response signal receiving device 6, and the operator of the relay stand 4 is notified by a visible / audible display. When a plurality of broadcast connections are made to other stations such as branch lines, response signals of different in-band frequencies are returned to each broadcast destination station by the number of broadcast connection destinations. Is more than one visible
Notify the operator of the relay stand 4 with an audible display. As a result, when the operator of the relay stand 4 confirms the display on the receiving device 6 and knows that all the connection destination response signals have been returned, the relay stand 4 is
The connection paths 8, 9 and 10 of the exchange 3 are sequentially opened by the electronic key operation, etc. and the connection paths 11 and 12 shown in FIG. 1 (b) are closed to disconnect the relay stand 4, and the photograph transmission information is displayed in this state. Relay.

As described above, according to the conventional method, it is necessary to perform intervention processing for one connection call many times, such as setting and releasing the paths 8, 9 and 10 and setting the paths 11 and 12 for the connection path setting of the exchange 3. However, there is a problem that the processing procedure in the storage program type exchange is complicated and diversified.

[Object of the Invention]

It is an object of the present invention to provide a photographic information manual tandem relay method in a time division exchange that can reduce the number of times of setting the connection path and simplify the processing procedure.

[Outline of Invention]

According to the present invention, when there is an incoming call from the photo information transmission source station to the storage program type time division private branch exchange via the relay line to the photo information transmission source station, the relay line is once connected to the relay stand. , Under the intervening operation control by the relay station based on the photo information transfer connection request, a branch trunk in which the partner response signal receiving device is fixedly accommodated in advance is captured at one branch point, and another branch of the branch trunk is acquired. A trunk is captured and accommodated at the point, and a photo reception request is transferred from the relay stand to the photo information destination station through the trunk and the relay line to the photo information destination station, while at the photo information destination station. The photo receiver in its own station, which is captured and activated based on the photo reception request, sends back a response signal of a frequency within a specific band assigned to its own station, and also receives the other party's response signal via the branch trunk. So as to be received identified by the apparatus,
Based on the display of the received identification result, after the photo information transmission source station is notified of the photo information transfer permission from the relay stand,
Under the intervening operation control by the relay stand, the connection between the relay stand and the relay line to the photo information transmission source station and each of the branch trunks is opened, and a new connection to the photo information transmission source station is made. A storage program type time division private branch exchange in which the photo information from the photo information transmission source station is received and transferred to the photo information transmission destination station via the branch trunk while the trunk line and the branch trunk are connected. Is a manual tandem relay method for photo information.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. 2 (a) and 2 (b). 2 (a) and 2 (b) are method connection diagrams showing respective connection states of an embodiment of a photographic information manual tandem relay method using a branch trunk in the time division exchange according to the present invention. 2 (a) and 2 (b), the same reference numerals as those in FIGS. 1 (a) and 1 (b) indicate the same or corresponding parts, 13 denotes a digital branch trunk according to the present invention, and 14-17. Is the set connection path.

With this configuration, when activated from the photo source station connected by the trunk line 1 such as the leased line in FIG. 2 (a), the exchange 3 closes the connection path 8 in the communication network and passes through the trunk 2. The photo transmission source relay line 1 is connected to the relay stand 4. In response to this, the handler of the relay stand 4 receives a connection request for transferring the photo information to another station such as a branch office, closes the connection path 14 by operating the electronic key of the relay stand 4, and captures the branch trunk 13. ,
The connection path 15 is closed, the trunk 7 is captured, and the trunk lines of other stations such as branch lines are activated. On the other hand, in the branch trunk 13, terminal devices such as the partner response signal receiving device 6 of its own station and its interface device 5 which are always used for the photo information relay connection are fixed in advance by the connection path 16 by the station data etc. ). This eliminates the need to set the connection path 16 for each connection request. In this state, the connection destination station (not shown) responds to the activation of the trunk line of another station such as a branch line, and responds to this by knowing that it is a photo reception request by dialing or voice information To start capturing. When this photographic receiver is activated, it returns a response signal of a specific in-band frequency assigned to itself. This response signal is returned to the branch trunk 13 through the trunk line such as a branch line and the trunk 7 and the connection path 15. Then, in the branch trunk 13, the interface device 5 is passed through the built-in digital adder circuit and the connection path 16.
To the partner response signal receiving device 6 by converting the digital signal into an analog signal. In the receiving device 6, the response signal is identified by the detector, the corresponding partner station display lamp is turned on, and the response signal is sent from the monitor circuit such as a speaker. If the operator of the relay stand 4 confirms this condition and decides that the photograph may be sent, after notifying the photograph sender, the connection paths 8 and 14 are opened by operating the electronic key or the like. The connection path 17 shown in FIG. 2 (b) is closed, and thereafter the intervention of the handling operation is stopped to prepare for the next connection request, and the photo transmission information is relayed in this connection state.

In the digital branch trunk 13, in the case of a system in which the other party's connection and the operating state are divided into multiple stages like photo transmission, and the operation proceeds while transmitting and receiving the response signal each time, the response signal is generally a voice signal. The transmission level is 2 to 3 times higher than the level. Further, in the case of the photo broadcast connection, a plurality of such response signals are usually returned at the same time. Therefore, in a branch trunk such as a commonly used conference trunk, there is a possibility that the quantization step represented by an 8-bit code may be exceeded, and in some cases, a normal input signal will be greatly distorted and output. For this reason, it is possible to use a photo broadcasting branch trunk which is modified so that the addition condition is changed and the addition result is returned to only one specific input.

〔The invention's effect〕

As described above, according to the photographic information manual tandem relay method using the branch trunk in the time division exchange of the present invention, the number of times of switching the connection path during one photographic information manual tandem relay is smaller than that in the conventional method. Since there are few transitions of the program state in the storage program type exchange and can be processed by a simple general connection routine, the simplification of the program processing is effective in reducing the number of processing steps, which in turn improves the program quality and ensures stable system operation. Is advantageous for maintaining.

[Brief description of drawings]

1 (a) and 1 (b) are system configuration diagrams illustrating respective connection states of a conventional photographic information manual tandem relay method in a conventional time division exchange, and FIGS. 2 (a) and 2 (b) are time division according to the present invention. It is a system block diagram which shows each connection state of one Example of the photographic information manual tandem relay method using the branch trunk in an exchange. 1 …… Relay line for photo destination 2 …… Trunk 3 …… Stored program time-division private branch exchange 4 …… Relay stand 5 …… Interface device 6 …… Receiver response signal receiver 7 …… Relay to other station such as branch line Line trunk 8 …… Setting connection path 13 …… Branking trunk 14 to 17 …… Setting connection path

Claims (1)

[Claims] 1. When an incoming call is received from a photo information transmission source station to a storage program type time division private branch exchange via a relay line to the photo information transmission source station, the relay line is once connected to a relay stand. In addition, a branch trunk in which a partner response signal receiving device is fixedly accommodated in advance at one branch point is captured under the intervening operation control by the relay stand based on the photo information transfer connection request, and A trunk is captured and accommodated at the other branch point, and the trunk from the relay stand,
While the photo reception request is transferred to the photo information transmission destination station via the relay line to the photo information transmission destination station, the photo information transmission destination station captures and activates the photo receiver in its own station based on the photo reception request. Then, the response signal of the frequency within the specific band assigned to the own station is returned, and the reception signal is received and identified by the other party response signal receiving device via the branch trunk. Based on the display of the reception identification result, From the relay stand,
After the photo information transmission source station is notified of the permission to transfer the photo information, the relay station and the relay line to the photo information source station and each of the branch trunks are controlled under the intervening operation control by the relay station. In addition to the connection being opened, the photo information from the photo information source station will be sent to the photo information destination station via the branch trunk while the relay line to the photo information source station and the branch trunk are newly connected. A tandem relay method for photo information in a time-division private branch exchange using a storage program, which is configured so that it can be received and relayed to and from each other.