JPS61194995A - Key telephone set - Google Patents

Abstract

PURPOSE:To omit ringer control and to simplify the control operation in the control circuit by reading incoming call data telephone set interface in a trunk line interface in response to an incoming call data to perform the ringer control. CONSTITUTION:The data transmission and reception between the trunk line interface 4 and the telephone set interface 6 and a data exchange section 3 occurs in a period of time (c), and the data transmission and reception between the data exchange section 3 and a control circuit 2 in the subsequent period of time (d). In every period (c), writing of the incoming call detection signal and incoming call state data in the data and exchange section 3 by the trunk line interface 4, reading of a ringer start signal and incoming call state data by the telephone set interface section 6, and sending out the ringer send out control signal are repeated. Such a control operation causes the ringer of key telephone sets T1-Tm to sound almost at the same time as the generation of incoming call state data '1' in the trunk line interface section 4. Telephone set interface 6 performs ringer send out control in every repeated period of time (c).

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a key telephone device, and more particularly to an electronic key telephone device that controls connections between a plurality of office lines and a plurality of key telephone sets.

[Prior art]

Conventionally, such a button telephone device has a button telephone T1. as shown in FIG. , T1, and a main device 1 that controls the connection between these key telephones and the central office line. The main device ll is connected to the station line L1°L2.・・・
・Accommodates ←L, a central office line interface 4 that horizontally writes the text, a telephone interface 6 that connects to a button telephone, a communication path switch unit 5 that forms a communication path between these interfaces, and controls each part. control circuit 2;
a data exchange unit 3 that functions as a buffer for exchanging data between the spread leg interface 4 and the telephone interface 6 and the control circuit 2; a ringer control circuit 8 that controls the ringer sound of each button telephone; ringer
oscillation circuit 7.

The control circuit 2 connects the station line L1. L2. ~． Incoming data from the Lfi is monitored via the central office line interface 4, and other data is sent and received via the data exchange section 3.

Each piece of data is assigned to a predetermined time slot, and the data is transmitted and received in synchronization with the time slots. When the control circuit 2 determines the state of incoming calls from each office line, it first determines the state of incoming calls to the office line L1. That is, data indicating the presence or absence of an incoming call from the office line is detected from the office line interface 4, and if there is an incoming call, the ringer control circuit 8 is controlled so that a ringer signal is sent to the corresponding key telephone. Next, the control circuit 2 determines whether a call has arrived on the office line L2, and then on the office line L8. In this way, the control circuit 2 performs incoming call determination for each office line and performs ringer control when there is an incoming call, and performs ringer control for each office line. ~． When LI1 is sequentially detected, the same operation is repeated again in the next time slot.

However, the control circuit 2 receives incoming data for each station line,
Ringer control In addition to data transmission, it controls the transmission and reception of many other data, so if the number of incoming office lines increases, the control circuitry will become more complex to control, so the ringer of the button telephone There are disadvantages in that the sound may be out of synchronization with the incoming call on the central office line, or the ringer may continue to ring for a while even after the incoming call has stopped.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a key telephone device in which the load on the control circuit of the main device is reduced and the timing at which the ringer rings is approximately the same as the time slot in which an incoming call occurs.

[Means for solving problems]

The present invention provides a telephone interface section for accommodating a connection line of a button telephone, a central office line interface section for accommodating a plurality of central office lines, a call path switch section for mutually connecting the button telephone and the central office line, and a button phone ringer
A button telephone device comprising: a ringer oscillation circuit section for making a sound, a ringer control circuit, and a control circuit for controlling the telephone interface section and the call path switch section;
As a means to solve the above-mentioned problem, the incoming call data is written to the data exchange section based on the incoming call data from the central office line interface section, and the data exchange section reads the incoming call data in the telephone interface section. It is characterized in that the ringer is controlled at nine timings in synchronization based on the data.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In the figure, the main device 1 of the button telephone device includes a control circuit 2 having a microprocessor, a data exchange section 3 consisting of a storage device, a central office line interface 4, a communication path switch section 5, and a ζ telephone ink-7 eighth 6. , a S/GAR oscillation circuit 7, and a ringer control circuit 8, and accommodates n station lines L1 to L1 via a station line interface 4,
Also, via the telephone interface 6, m button telephones f! k T l - T m are connected.

The stations ill Lt to L1 are input to the office line interface 4, and the telephone line is connected to the telephone interface 6 via the telephone path switch section 5. On the other hand, the data line logically connects between the office line interface 4 and telephone interface 6 and the data exchange section 3, and between the data exchange section 3 and the control circuit 4, respectively. A central office line interface 4 and a telephone interface 6 are connected via this data line.
is controlled by data sent from the data exchange section 3 and sent from the control circuit section 2 which is composed of a microprocessor. The communication path switch section 5 establishes and releases communication paths according to commands from the control circuit 2.

Office line interface 4. The telephone interface 6 periodically transmits and receives data to and from the control circuit 2 via the data exchange section 3 at pre-assigned time slots.

The data exchange section 3 assigns data storage addresses to the office line interface 4 and the telephone interface 6 in advance.

That is, storage addresses for data regarding each office line connected to the office line interface 4 are assigned for each office line, and storage addresses for data regarding each key telephone connected to the telephone interface 6 are also assigned for each key telephone. A common storage address is also assigned to each interface 4.6. The control circuit 2 can periodically check these addresses and control the status.

FIG. 2 shows a timing chart of the above-mentioned data transmission/reception operation between each interface 4.6, data exchange section 3, and control circuit 2. As shown in FIG. Transmission and reception of data between the central office line interface 4 and the telephone interface 6 and the data exchange section 3 is performed during a period C, and the data exchange section 3 and the control circuit 2
Data is transmitted and received between the two during the following period d.

Period C has time slots every period e (1m 5ec)) 1.2. ..., S, and the interfaces 4 and 6 transmit data to the data exchange unit 3 in the first half of each time slot, and receive data in the first half of each time slot. In time slot 1, data related to the office line L1 is sent and received, in time slot 2, data related to the office line L2 is sent and received, and in time slot n, data related to the office line L3 is sent and received. Telephone interface 6 from n+1° to S
Send and receive data with. The data sent from the central office line interface 4 to the data exchange section 3 includes an incoming call detection signal, an incoming call status, etc., and the data received from the data exchange section 3 includes a polarity inversion signal and a response signal. In addition, there are various button data as the data that the telephone interface 4 sends to the data exchange section 3, and conversely, the data exchange section 3
The data received from the controller includes lamp control signals and the like.

During period d, all data within the data exchange unit is transmitted and received with the control circuit.

FIG. 3 shows a timing chart of signals generated when a call is received from the central office line.

Now, when there is an incoming call on the office line L1 and input to the office line interface 4, the office line interface 4 detects the incoming call and at the same time as shown in FIG.
``1〃 data) and binary incoming call status data corresponding to the incoming call are generated.

Incoming calls are usually made on public lines with a signal period of 1 sec and 2 s.
There is an ec blanking period, and these periods a.

The data exchange period (c+d) in the main device l is a considerably smaller value (for example, 3 zmsec) than b. In time slot 1 of period C, the incoming call detection signal and incoming call status data of the central office line L1 are written to a predetermined address of the data exchange section 3. Here, the incoming call status data is written to a common storage address in the interface 4.6. When period C ends and transitions to period d, the control circuit 2 sequentially reads the data from the data exchange section 3, selects the button telephone that makes the ringer ring based on the incoming call detection signal read as '11', and transmits the data. The storage address at which the ringer activation signal (data of 1# in ') and the incoming call status data are written is written into the corresponding storage address of the telephone interface 6 prepared in the exchange section 3.

When period d ends, in time slot 1 of the next period C, the incoming call detection signal and incoming call status data of the central office line L1 are written to a predetermined address of the data exchange section 3. At this time, the contents written in the previous period C disappear. Also, that period C
At the same time, it takes a time slot for data transmission and reception with the telephone interface 6 and specifies the telephone to be ringed, reads the storage address of the incoming call status data, and reads the incoming call status data of the data exchange unit 3 at this storage address. When the data is 11", the ringer control circuit 8 sends out the ringer sending control signal ""1#.

This ringer transmission control signal connects the specified telephone to the ringer oscillation circuit 7, and the telephone rings with the ringer oscillation signal.

After the period d following the above period C, for each period C, the central office line interface 4 writes an incoming call detection signal and incoming call status data to the data exchange section 3, and the telephone interface section 6 writes a ringer activation signal and an incoming call. Reading the status data and sending out the ringer sending control signal when the incoming call status data is 11' are repeated. When the incoming call detection signal becomes 10', the ringer activation signal becomes 0#.

Through the above control, the ringing of the button telephones Tl, . It will ring almost simultaneously with the occurrence of 1'. Furthermore, once the ringer activation signal is written in the data exchange section 3, the telephone interface 6 performs ringer transmission control every period C that repeatedly occurs, so there is no burden on the control circuit 2 to control ringer oscillation.

〔Effect of the invention〕

As explained above, in the present invention, the telephone interface reads the data of the incoming call on the central office line interface and controls the ringer. It does not take much time for the ring to sound, and the ringer control in the control circuit can be omitted, which has the effect of simplifying the control of the control circuit.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG.
FIG. 1 is a timing chart showing the data flow within the main device used, FIG. 3 is a timing chart showing the incoming call operation, and FIG. 4 is a block diagram showing the configuration of a conventional device. 1...Main device, 2...Control circuit, 3.
... Data exchange section, 4 ... Office line interface, 5 ... Call path switch section, 6 ...
... Telephone interface, 7 ... Ringer oscillation circuit, 8 ... Ringer control circuit s 11
'=La...Station line %T1-T1...Push-button telephone. Deaf 1 figure YZ publication “Todoro visit 1'-Par & ball 6 'I-3■ also (Kiri 1 Shin last flow 4I21

Claims (1)

[Scope of Claims] A telephone interface section that accommodates a connection line of a button telephone, a central office line interface section that accommodates a plurality of office lines, and a call path switch section that connects the button telephone and the central office line with each other. a ringer oscillator circuit that generates a ringer signal that causes a ringer of a button telephone to ring; a ringer control circuit that controls the ringer signal and generates an intermittent signal; and a control that controls the telephone interface section and the call path switch section. a button telephone device including a circuit, the button telephone device having a data exchange section for transmitting and receiving all data between the central office line interface, the telephone interface, and the control circuit, wherein an incoming call to the central office line interface is detected. When the central office line interface section detects the incoming call data, the telephone interface section reads out the incoming call data detected by the central office line interface section via the data exchange section, and controls the ringer tone of the key telephone based on the read out incoming call data. A button telephone device featuring: