JP3444331B2 - Caller information notification system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and control of a time division switching system for transmitting calling party information such as a telephone number and name of a calling party to a home display unit of a called telephone in a telephone switching network. The present invention relates to a method, and more particularly, to a caller information notification system for sending caller information to a called party telephone line in which the called party is talking.

[0002]

2. Description of the Related Art US LSSGR (LATA Switching Syst
ems Generic Requirements), FR-NWT-0000
The caller information notification service defined in the 64 specifications includes that in which the called telephone is in the on-hook state and that in the off-hook state. When on-hook,
A call signal of one burst is sent to the called party's telephone with an in-home display device to call the called party's attention, and then the calling party information is transmitted as FSK (Frequency Shift Keying) data and sent to the in-home display device. The caller information is displayed, and then the ringing signal is continuously transmitted to call the called party.
In the LSSGR standard, there is a strict timing regulation as shown in FIG. 3 between the first burst and the second burst of the calling signal. Therefore, in a system in which the on / off of the calling signal is controlled by the local processor of the telephone interface device, the transmission control of the FSK modem must be performed by the same processor. Therefore, the FSK data transmitter is generally provided in the telephone interface device.

On the other hand, in the off-hook state, an incoming call notification sound is sent to the called party during a call to call attention.
After the activation signal is transmitted to the in-home display device and the confirmation signal is received, the caller information is transmitted and displayed. Also in this case, there is a strict timing regulation with the sequence shown in FIG. Therefore, as shown in FIG. 4, an incoming call notification sound, a home display device activation signal, a DTMF (Dual Tone)
The confirmation signal and FSK data by (Multi Frequency) must be sequentially switched at extremely short time intervals for transmission and reception.

[0004]

However, in the conventional control system, the communication path between various audio signal oscillators, DTMF receivers, etc. and the telephone interface circuit is controlled by the central processing unit for one time via the communication path switching device. It is common to connect each slot, and the time for controlling the channel setting and connection switching of the channel switching device by the central processing unit is coarse compared to the above timing standard, and the scale of the switching system and the call processing Since it greatly varies depending on the load, it is difficult to control the transmission of the calling party information while keeping the time defined by the LSSGR.

The present invention has been made in view of the above-mentioned problems of the conventional method, and an object thereof is to transmit caller information conforming to a timing standard without drastically changing the hardware configuration of the system. It is to realize a calling party information notification system capable of creating a signal.

[0006]

SUMMARY OF THE INVENTION A caller information notification system according to the present invention comprises a speech path switching device composed of a time division switching switch, and a telephone interface device connected to the speech path switching device by a time division highway. And a DTMF receiver, an incoming call notification sound oscillator, and an in-home display device activation signal oscillator, and also includes the speech path switching device, the telephone interface device, and a central processing unit for controlling the DTMF receiver, and the telephone interface. The device has a telephone interface circuit, an FSK data transmitter, and a switching switch capable of connecting an arbitrary time slot of a time division highway connected to the speech path switching device to the telephone interface circuit. When a caller information notification request is issued, the central processing unit is configured to use the speech path switching device. By controlling, the call notification sound oscillator, the home display device activation signal oscillator, the DTMF receiver and the telephone interface device are simultaneously set to three call paths, and then the telephone interface device Switching the time slot on the time division highway side connected to the telephone interface circuit using an exchange switch temporarily disconnects the already connected time slot during a call, and then displays an incoming call notification sound time slot and home display The device activation signal time slot and the DTMF receiver time slot are sequentially connected to the telephone interface circuit.

In this system, the telephone interface device preferably has a plurality of telephone interface circuits and one FSK data transmitter.
The SK data transmitter is configured to be selectively connectable to any of the telephone interface circuits.

Further, preferably, the telephone interface device has a local processor connected to the central processing unit through a control communication path, and when the notification request of the calling party information is issued, the local processor is The central processing unit receives an incoming call notification time slot, a home display device activation signal time slot, number information indicating a DTMF receiver time slot, and caller information to be transmitted to the home display device, and switches the exchange switch. Control and F
The connection control and the transmission control of the SK data transmitter are performed, and the caller information is transmitted to the telephone line according to a predetermined procedure.

As described above, in the present invention, the ring tone time slot, the in-home display device activation signal time slot, and the DTMF receiver time slot are simultaneously connected to the telephone interface device by the speech path switching device. This corresponds to connecting these three time slots to three empty time slots of the highway (82 in FIG. 1) at the same time in the embodiment described later.

Further, the switching of the exchange switch in the telephone interface device is preferably performed by a local processor in the telephone interface device. As a result, the timing of the exchange switch can be controlled independently of the central processing unit without depending on the system scale or call processing load. Therefore, it is possible to easily generate a caller information transmission signal conforming to a strict timing regulation with little change in switching timing.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A system configuration diagram of an embodiment of the present invention is shown in FIG.

In FIG. 1, reference numeral 1 is a speech path switching device constituted by a time division exchange switch, 2 is a telephone interface device, 3 is a central processing unit (CPU) for controlling the entire system, and 31 is a central processing unit 3. It is a communication channel for control. Reference numeral 4 is an incoming call notification sound oscillator, 5 is a home display device activation signal oscillator, 6 is a DTMF receiver, 71 and 72 are station line trunks (COT) connected to a public telephone network, 84, 85 and 8
Reference numerals 6, 871 and 872 denote respective time division highways.

Further, the telephone interface device 2 is
n (n ≧ 1 integer) telephone interface circuits 2
11 to 21n, the FSK data transmitter 22, and any time slot of the time division highway 82 connected to the speech path switching device 2 to the telephone interface circuits 211 to 2
Exchange switch 24 connected to 1n, said FSK
From the selection switches 231A to 23nA, 231B to 23nB that selectively connect the data transmitter 22 and the exchange switch 24 to the telephone interface circuits 211 to 21n, and the local processor (LP) 25 that controls the circuits inside the telephone interface device 2. It is configured.

Reference numeral 100 denotes a telephone, 101 denotes the telephone 10.
A home display device installed near 0 for displaying caller information on an LCD or the like, and a telephone line 102 connecting the telephone 100 and the home display device 101 to the telephone interface circuit 211.

Now, when the telephone 100 is in a call using the station trunk 71, a call is received from the station trunk 72 to the telephone 100, and the telephone number of the caller is transmitted from the station trunk 72. The case where it has been described will be described as an example.

The call path of a call during a call is a station line trunk 71, a time slot on the time division highway 871, a communication path set in the communication path switching apparatus 1, a time slot on the time division highway 82, a telephone interface circuit 211,
And the telephone line 102, and is connected to the telephone 100.

In this state, when the central office trunk 72 is activated from the public telephone network and the telephone number information of the caller is sent (that is, a caller information notification request is generated), the central processing unit 3 Recognizing this, the following processing is performed.

The central processing unit 3 controls the speech path switching unit 1 so that the incoming call notification time slot on the highway 84, the home display device activation signal time slot on the highway 85, and the DTMF receiver time slot on the highway 86 can be selected. One time slot is selected to connect to three empty time slots on the highway 82 at the same time. Time division highway 8 of the telephone interface device 2 at this time
An example of the state 2 is shown in FIG. 2A shows a highway state in the direction from the speech path switching device 1 to the telephone interface device 2, and FIG. 2B shows a highway state in the opposite direction. In FIGS. 2A and 2B, call signal data of a call in progress (call between the trunk line trunk 71 and the telephone 100) is assigned to the time slots TSa and TS'a. The time slot TSb of FIG.
Data of an incoming call notification sound and data of an in-home display device activation signal are assigned to each TSc. Also, FIG.
Data to the DTMF receiver is assigned to the time slot TSd in (b).

Next, the central processing unit 3 accesses the local processor 25 in the telephone interface unit 2 to select the time slot number information (TSb,
TSc, TSd, TS'b, TS'c, TS'd),
The telephone number information of the caller to be sent to the in-home display device 101 obtained from the station line trunk 72 is transmitted.

Upon receiving these pieces of information, the local processor 25 starts the control of sending the calling party information to the telephone line 102 according to the signal sequence shown in FIG.

First, the local processor 25 controls the exchange switch 24 to connect the call signal time slots TSa and TS'a (FIGS. 2A and 2B) of the central line trunk 71 to the telephone interface circuit 211. Then, the incoming call notification sound time slot TSb (FIG. 2A) is connected to the telephone interface circuit 211 for a predetermined signal transmission time via the selection switch 231A. As a result, the called party who is talking on the telephone 100 hears the incoming call notification sound and notifies the incoming call.

Similarly, by connecting the indoor display device activation signal time slot TSc (FIG. 2A) and the telephone interface circuit 211 for a predetermined signal transmission time, the local processor 25 connects the telephone line 102 to the in-home display device. Send a start signal. This signal is detected and recognized by the in-home display device 101, and the local processor 25 starts the operation of returning the DTMF confirmation signal at a predetermined timing.

On the other hand, the local processor 25 connects the DTMF receiver time slot TS'd to the telephone interface circuit 211 and waits for a confirmation signal from the in-home display device 101 immediately after the transmission of the in-home display device activation signal is completed. The central processing unit 3 monitors the arrival of the confirmation signal received by the DTMF receiver 6 via the control signal communication path 31 and, upon receiving the confirmation signal, starts transmitting the caller information to the local processor 25 of the telephone interface unit 2. Give instructions. In response to this, the local processor 25 closes the selection switch 231B and controls the FSK data transmitter 22 to obtain the telephone number information of the calling party previously received from the central processing unit 3 in the telephone line 1 in the FSK data format.
Send to 02. The home display device 101 receives this and displays the telephone number of the calling party.

Further, the local processor 25 controls the exchange switch 24 to release the connection between the time slot TS'd (FIG. 2B) for the DTMF receiver and the telephone interface circuit 211, and at the same time, the local line trunk 7
1 call signal time slots TSa, TS'a (Fig. 2
(A), (b)) and telephone interface circuit 211
Reconnect and. During this time, the central processing unit 3 is DTMF
After the receiver 6 completes the reception of the confirmation signal from the in-home display device 101, it controls the call path switching device 1 to receive an incoming call notification sound time slot, in-home display device activation signal time slot,
The connection between the DTMF receiver timeslot and the time division highway 82 of the telephone interface device 2 is released.

After that, a normal exchange service is provided by the operation of the telephone of the called party.

Which data in the time slot of the highway 82 is selected by the exchange switch 24, and further selected by the selection switch 23nA, the telephone interface circuit 21.
Whether it is input to n is shown in the time chart of FIG. It shows at what timing the call signal, the notification sound, the activation signal, and the DTMF reception, which are the contents of the time slot in FIG. 2, are connected to the corresponding telephone interface circuit.

The time chart of the selection switch A is High.
When the time chart of any of the call signal (COT71), the incoming call notification sound 4, the home display device activation signal 5, and the DTMF receiver 6 is at the high level at the h level, the time slot of the data is selected by the exchange switch 24. Then, it is connected to the telephone interface circuit 21n. Also,
When the time chart of the selection switch B is at the high level, the caller information data sent from the FSK data transceiver is connected to the telephone interface circuit 21n.

As a result of the above operation, the time slot information of FIG. 2 is changed according to the sequence of FIG.
Data is sent and received.

[0029]

According to the above embodiment, the incoming call notification sound, the home display device activation signal, and the DT required for the caller information notification signal are obtained.
Since each time slot of the MF receiver is connected prior to signal transmission / reception in the speech path switching device, the signal transmission / reception sequence and timing can be controlled almost independently by the local processor in the telephone interface device.
It is possible to easily realize transmission and reception of a series of signals conforming to the LSSGR standard.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a control system showing an embodiment of the present invention.

FIG. 2 is an explanatory view of a divided highway (a) in a direction from a call path switching device to a telephone interface device and a time division highway (b) in a direction from a telephone interface device to a call path switching device.

FIG. 3 is a data transmission sequence diagram in an on-hook state.

FIG. 4 is a data transmission sequence diagram in an off-hook state in the caller information notification service.

5 is a timing diagram for explaining the operation of the system shown in FIG.

[Explanation of symbols]

1 ... Call switching device 2 ... Telephone interface devices 211 to 21n ... ... Phone interface circuit 22 ... FSK data transmitter / receiver 231A-23nA ... Selection switch 231B to 23nB .... Selection switch 24 ... Exchange switch 25 ... ... Local processor 3 ... Central processing unit 31 ... Control of central processing unit Communication channel 4 ... Incoming call notification sound oscillator 5 Oscillator 6 ···· DTMF receiver 71, 72 ····· Station line trunk connected to public telephone network 82, 84, 85, 86 ... Time division highways 871, 872 ... Time division highways 100 ...・ ・ ・ Telephone 101 ・ ・ ・ Home display device 102 ・ ・ ・ Telephone line

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiro Hasegawa 180 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi Communication Systems Co., Ltd. (72) Koji Fujiwara 180 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi Communication Systems Within the corporation (56) Reference JP-A-5-236134 (JP, A) JP-A-5-199304 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04M 3/42

Claims (3)

(57) [Claims] 1. A speech path switching device comprising a time division switching switch, a telephone interface device connected to the speech path switching device by a time division highway, a DTMF receiver, an incoming call notification sound oscillator, and a home display. An apparatus activation signal oscillator is provided, and a central processing unit that controls the speech path switching apparatus, the telephone interface apparatus, and the DTMF receiver is provided, and the telephone interface apparatus includes a telephone interface circuit, an FSK data transmitter, and the speech path. And a switching switch capable of connecting an arbitrary time slot of a time-division highway connected to a switching device to the telephone interface circuit, the central processing being performed when a caller information notification request is made for a call in progress. The device controls the communication path switching device to activate the incoming call notification sound oscillator and the home display device. The time division in which three call paths are simultaneously set between the signal oscillator, the DTMF receiver and the telephone interface device, and then connected to the telephone interface circuit by using the exchange switch in the telephone interface device. After temporarily disconnecting the already connected time slot by switching the time slot on the highway side, the incoming call notification sound time slot, the in-home display device activation signal time slot, and the DTMF receiver time slot are sequentially connected to the telephone set. A caller information notification system characterized by being connected to an interface circuit. 2. The telephone interface device has a plurality of telephone interface circuits and one FSK data transmitter, and the FSK data transmitter is configured to be selectively connectable to any of the telephone interface circuits. The caller information notification system according to claim 1, wherein 3. The telephone interface device has a local processor connected to the central processing unit via a control communication path, and when the caller information notification request occurs, the local processor performs the central processing. From the device,
Incoming call notification sound time slot, in-home display device activation signal time slot, number information indicating DTMF receiver time slot and caller information to be transmitted to the in-home display device are received to perform switching control of the exchange switch and FSK data transmitter. 3. The caller information notification system according to claim 1, wherein the caller information is transmitted to the telephone line according to a predetermined procedure by performing connection control and transmission control of the caller.