JPS61144955A - Paging system - Google Patents

Abstract

PURPOSE:To prevent the opposite party from feeling uneasy even when a holding time becomes long by sending out a speech signal indicating that a paging call is being made from one terminal to the other terminal to the opposite side when a call is made by a time-division exchange, and letting the opposite party know that the paging call is being made. CONSTITUTION:When one terminal 3 calls another station terminal which is not shown in a figure during a call through a trunk line including a leased line, connections are made as shown in a figure by operating a paging call button and a call speech signal is sent out to the opposite-side terminal 2 and a speaker 4. The terminal 2, therefore, know that the terminal 3 is in the paging call. At this time, the speech of the opposite party is not connected to the speaker 4 under time-division control. A digital signal outputted from an output distributor MPX0 to respective terminals is reconverted by the CODEC of each terminal into an analog signal, which is transmitted. This state is continued successively to allow a communication between the opposite terminal A and terminal B.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a paging call function used when transferring calls to central office lines, including private lines of public corporations, to other terminals. It is applicable to the digital paging call method of the communication path.

(Prior Art and its Problems) Conventionally, this type of function has used the connection form shown in FIG. 1 when making a call to a central office line, including a private company line.

Here, 1 is a main device connected to the other terminal 2 via the station [5 and also connected to the terminal 3 of the own station, and the normal line trunk 1-1. Terminal interface 1-2. On hold sound source 1-3. It includes a paging amplifier 1-4 and a switch circuit 1i11-5. In such a device, during a call between the local terminal 3 and the terminal 2 connected via the central office line 5, the local terminal 3 makes a paging call to another local terminal (not shown) due to transfer or the like. When the button is operated, the held tone is sent from the held sound source 1-3 to the central office line 5 via the line trunk 1-1, as shown in FIG.

On the other hand, on the local terminal 3 side, voice calls can be made via the terminal interface 1-2, paging amplifier 1-4, and speaker 4, and other local terminal 3a, which is a transfer destination (not shown), is enabled.
By listening to the call and operating the corresponding button, the terminal 3a and the terminal 2 can be put into a conversation state again.

Note that paging calls cannot be made to the speakers of other terminals that are communicating with outside lines.

In this method, when the hold time becomes longer, the held terminal 2
The disadvantage is that it makes the caller feel uneasy.

(Objective of the Invention) The present invention has been devised to eliminate this drawback, and the voice input from the other party is not emitted from the speaker of the own terminal, but the voice input from the other party is not emitted from the speaker of the own terminal. A paging system is provided in which a voice signal during a paging call is also transmitted to the other party to notify that a paging call is in progress.

(Structure and operation of the invention) The present invention will be explained in detail below.

During a call with a central office line including a leased line, when the local terminal 3 calls another local terminal 3a (not shown), the connection mode shown in FIG. and send it to Sbee force 4. Therefore, the terminal 2 side can know that the terminal 3 is making a paging call.

Note that, at this time, time-division control is performed so that the other party's voice is not connected to the speaker 4.

Next, an example of the switch circuit network 1-5 when the present invention is implemented in a time-division format will be described with reference to FIG. 4.

However, the application of the present invention is not limited to this method.

In FIG. 4, A is the other party's terminal, a is the voice from the other party's terminal, B is the own terminal which is the transferer, b is the transferer's voice signal, and P is the paging device. H is co-opic C0D
Hybrid including EC, MPX.

is an input scanning circuit, MPXO is an output distributor, HWM is a communication path memory, and HWC is a communication path network control circuit.

In a normal call connection mode, in order to exchange audio between terminals A and B, audio a from terminal A and audio from terminal B are converted from analog signals to digital signals by co-opic C0DEC in a time-sharing manner as shown in the figure. Manual scanning circuit MPX,
Send to. The manual scanning circuit MPX has a time slot of tl as shown in FIG.

to write to Ml (memory block 1). The digital signal written to memory block M1 is transferred to M3 (memory block l1h3) at time slot t2 under the control of communication path network control circuit HWC.

Furthermore, in the time slot t, the digital signal of the memory block M3 is output to the output distributor MPXO. Also, in the time slot t2, the input scanning circuit MPX
The digital signal input at , is written to M2 (memory block 1lh2), and in time slot t, the communication path network control circuit HIIG transfers it from memory block M2 to M4 (memory block 11h4), and in time slot t4. The output distributor 'fPXo sends out the digital signal from the memory block M4. Also, t
In the time slots , , the manual scanning circuit MPX is written into the memory block M1, and by repeating the same procedure as described above, digital signals can be exchanged. This situation is shown schematically in FIG. The digital signal output from the output divider MPXO to each terminal is converted back into an analog signal by the copier CODEC of each terminal and transmitted. By continuing this state one after another, the other party's terminal A and the local terminal B become able to talk.

In the case of this paging method, it is possible to send out the same output signal by rewriting the same digital signal to the paging memory area when exchanging using the digital memory described above. It is possible to output the information to P and at the same time maintain the communication between the other party's terminal A and the transferer B.

Conventionally, in space division switching equipment that handles analog,
When transferring a line, the line is temporarily put on hold and switching control is performed to connect the corresponding paging circuit and the call path between the transfer party. In addition, in the case of simultaneous connection with the corresponding paging circuit that does not put the line on hold, the conventional method connects the call path between the line and the forwarder using an interrupt trunk, and then connects to the corresponding paging circuit, paging the call content. It just outputs to the circuit.

However, for example, in the present invention using a four-wire time division switch, the sending and receiving can be controlled separately, and it is also possible to output the sending output to the input of a plurality of receivers. Utilizing this characteristic, it is possible to simultaneously connect the transmitter's transmission to the paging circuit while the other party's terminal and the transmitter's own terminal are connected to each other, and also output the audio input from the other party's terminal to the paging circuit. Because it is possible to avoid
Unlike in the past, the calls from the other party's terminal and those sent by the forwarder are not mixed up, and only the calls sent by the forwarder are output to the paging circuit, making it possible to transfer while maintaining the call between the other party's terminal and the transferer. becomes.

(Effects of the Invention) As described above, according to the present invention, since the calling voice is sent to the other party, there is an advantage that the other party does not feel uneasy even if the holding time becomes long.

[Brief explanation of drawings]

Fig. 1 is a connection system diagram showing the connection form during a call in the conventional paging system, Fig. 2 is a connection system diagram showing the connection form during a paging call in the conventional paging system, and Fig. 3 is the paging system of the present invention. FIG. 4 is a block diagram showing an example of a time-division type communication path network switch circuit used in the present invention, and FIGS. 3 is a block diagram and a timing chart for explaining the operation of the communication path memory used in the circuit example. FIG. 1... Main device, 1-1... Line trunk, 1-2
...terminal interface, 1-3...hold sound source,
1-4... Paging amplifier, 1-5... Switch circuit network, 2... Other terminal (A), 3... Local terminal (B), 4... Speaker, 5... central line,
GODEC...Coding, MPX,...Input scanning circuit, Hth...Call path memory, Ml, M
2. M3゜■...Memory block, HWC...
・Communication network control circuit, MPXo...output distribution circuit,
P...Paging device.

Claims (1)

[Claims] In a paging method in which a plurality of terminals are connected to each other via an exchange switch circuit network and a paging device is connected to the switch circuit network to make a paging call, when the paging call is made, one of the plurality of terminals When the paging call is made while two terminals are talking to each other, a one-way connection is achieved from only one of the two terminals to the paging device, and a two-way connection is established between the two terminals. A paging method, characterized in that the time slots in which the connection is achieved are arranged to distinguish from each other in a time-sharing manner.