JPH01276953A - Telephone system - Google Patents

Abstract

PURPOSE:To send the data of a control program individually to each extension terminal equipment as required in response to the respective state of each extension terminal set by providing a control program request means to the extension terminal set and a control program transmission control means to a master set. CONSTITUTION:A state report instruction (ENQ command) is sent to a telephone set 23 from a digital subscriber circuit 27 in an exchange 21 at first via, e.g., a digital line interface section 112 in the initial setting processing. The telephone set 23 diagnoses its own state according to the sent ENQ command and sends a program data request command (IPLREQ command) to the digital subscriber circuit 27 in the case of the initial state. In the reception of the IPLREQ command, the digital subscriber circuit 27 transfers a program data to the telephone set 23 accordingly. After the ENQ command is sent to the telephone set 23, the ENQ command is sent to a telephone set 24 and then a telephone set 25 sequentially and then the program data is transferred by the similar procedure.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a telephone device installed in business offices, government offices, etc., and equipped with a plurality of extension terminals.

BACKGROUND OF THE INVENTION Recently, local telephone equipment consisting of an electronic private branch exchange and multiple extension terminals has been equipped with a microcomputer to exchange data such as various commands between the main equipment, which has switching and central control functions, and the extension terminals. Telephone devices (generally called button telephone devices) that are configured to provide a variety of detailed services depending on the installation status of each extension while communicating have come to be widely used. Naturally, control software (data transmission, tone control, display control, power outage processing,
(other), it is necessary to find something that better meets the user's wishes. Furthermore, if each extension terminal is desired to have a variety of functions depending on its installation status and user's wishes, it is preferable to provide each extension terminal with a microcomputer to make the extension terminal intelligent. Data of a control program for a telephone device is stored in a read-only memory (hereinafter referred to as ROM) of a semiconductor integrated circuit provided in an extension terminal.

By the way, in cases where the extension terminal has become intelligent in this way, if you want to completely change the control program due to improvements such as expansion of functions, it is necessary to transfer the ROM containing the new control program to the extension terminal. It will be installed. It is necessary to install the ROM not only at the IM location of the main device but also at each extension terminal. As described above, if the ROM is replaced one by one for each extension terminal placed in each room, it becomes a difficult task when there are a large number of extensions.

In addition, in order to allow the user to easily change the control program, an interpreter for translating the control program and actually running it is installed in the ROM of each extension terminal.
The control program itself is stored in the RAM of each extension terminal.
It should be configured so that it is stored in . Then, at the time of initial setting or reset of the main device, a new control program is used to start up, and at the same time, the program data used in the extension terminals is configured to be sent to each extension terminal using the existing data transmission means. Bye.

Problems to be Solved by the Invention However, in such a configuration, the control program data of the extension terminal may be corrupted for some reason, or the power line from the main unit to the extension terminal may be cut off, causing the control program data in the RAM to be lost. It may happen. Also, when moving extension terminals, multiple terminals will be removed from the main unit at the same time, and for multiple terminals that are removed, the power line from the main unit to the extension terminals will be cut off as in the case above. The control program data will be lost. In this case, control program data transmission processing is required only for the extension for which control program data has been lost, but control program data transmission processing is only required at the time of initialization or reset of the main device as in the conventional example. If the configuration does not allow this, all extension lines will be unavailable during the control program data sending process. In particular, extension terminals may be moved quite frequently, and it would be very inconvenient if all extension terminals became unusable each time.

It is also possible to call the extension terminals one by one and send out the control program data individually from the control console of the main unit, but this would require inputting the numbers specifying the extensions individually. It takes a lot of time and effort. Moreover, when moving extension terminals, multiple terminals are removed from the main unit at the same time. The person in charge of the operation is solely responsible for transmitting the control program data, resulting in poor work efficiency.Furthermore, carefulness is required to specify the moved extension without making a mistake, making the work quite difficult. turn into.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a telephone device in which a control program can be individually incorporated into each extension.

Means for Solving the Problems In order to solve the problems, the present invention provides a control program requesting means for requesting control program data in the extension terminal, and transmits the control program from the extension boat to the main device via the data transmission means. A control program sending control means was provided which sends control program data used in the extension terminal from the extension boat when a request signal is input.

Operation By configuring as described above, control program data can be sent to each extension terminal individually when necessary, depending on the status of each extension terminal.

Embodiments Below, as embodiments of the present invention, a digital telephone exchange and a digital telephone connected thereto will be described. FIG. 2 shows its schematic configuration. In FIG. 2, 21 is a digital exchange, 22 is a communication path switch section provided in the digital exchange 21, and 23 to 26 are
are digital telephones, respectively, and 27 is a digital subscriber circuit which collectively serves as an interface for each of the digital telephones 23-26.

FIG. 1 is a block diagram showing only the essential parts of a digital exchange 21 and a digital telephone 23 related to the present invention. In the digital telephone 23 shown in FIG. 1, 12 is a microprocessor, and 13 is an IPLROM that stores an IPL program necessary for program transfer.
, 14 is a RAM 115 that stores programs transferred from the exchange side, and a communication control unit that controls data transfer;
Reference numeral 16 denotes a digital line interface unit that controls a physical level interface for data transmission between the digital telephone 23 (hereinafter referred to as the telephone 23) and the digital exchange 21 (hereinafter referred to as the exchange 21). Reference numeral 17 denotes an audio circuit section composed of an audio amplifier, a microphone, a speaker, a codec, and the like. Reference numeral 18 denotes a DTE interface section that controls interfaces with various data terminal devices 19 connected to the outside.

On the other hand, the portion surrounded by broken lines in FIG. 1 is the aforementioned digital subscriber circuit 27. In the digital subscriber circuit 27, 111 is a communication control section that controls data transfer, and 112 to 115 are digital line interface sections, respectively, which control a physical level interface for data transmission. 116 is a ROM that stores a program for operating the digital subscriber circuit 27 itself.
(hereinafter referred to as ROMI). 117 is a ROM (hereinafter referred to as ROM2) that stores a program to be sent to each digital telephone. 118 is a microprocessor section.

In this embodiment, a digital subscriber line transmission system is used between the terminal telephone and the exchange. The major difference from normal analog transmission is that a digital telephone equipped with the function of converting an analog signal into a PCM signal is used as an extension telephone. Data frames assembled in a predetermined format are transferred to and from the exchange 21 at a constant timing. In the digital telephone 23, for example, the communication control unit 15 is connected, and in the digital exchange 21, the communication control unit 11
1 is in charge of the data transfer. The format of the data frame used for data transfer between the communication control section 15 and the communication control section 111 is usually a format called 2B+D, as shown in FIG. 5(a).

That is, in FIG. 5(a), D is a signal channel (hereinafter referred to as D channel) used for transmitting control signals between the exchange 21 and the telephone 23, and Bl and B2 are information channels used for transmitting information. (hereinafter referred to as B1 channel and B2 channel), the D channel is composed of 2 bits, and the B1 channel and 82 channels are each composed of 8 bits. By the way, the above 2
The B+D format is essentially a format used for low-level data transfer between the communication control unit 15 and the communication control unit 111. For example, data for controlling devices and various data sent by users are transferred to a higher level. A communication protocol will be decided upon and the protocol will be followed. When using the 2B+D format, these data are normally sent using the D channel (2 bits).

Before sending out the operation program for the telephone 23, an inquiry command (hereinafter E) is sent from the exchange 21 to the telephone 23.
N, Q) and program data transfer request command (hereinafter referred to as I PLRE) from the telephone 23 to the exchange 21.
In order to transmit this information, a data frame is created in the format shown in FIG. 5(C). The method of sending this data is 2B+D by 2 bits as described above.
It is placed on the format D channel.

Regarding actual program data transfer, as shown in FIG. 5(b), 2 bits of the D channel are allocated as parity pits, and a total of 16 bits consisting of channels 81 and 82 are allocated for program data. Among them, the first half of the D channel is used as the parity pit (parity Pl) of the data (data 1) inserted into the Bl channel, and the second half of the D channel is used as the data inserted into the B2 channel. (Data 2) is used as a parity pit (parity P2). In this way, if program data is transferred using the B1.82 channel, which has conventionally been dedicated to main communication information such as voice, it becomes possible to transfer program data at a very high speed of 128 kbps. In actuality, a data frame is created in the format shown in FIG. 5(d) to transmit information. In FIG. 5(d), the data frame for program data transfer consists of a flag for frame synchronization (16 bits), program data (2×n 8 bytes), and a frame check sequence (16 bits). The method for transmitting this data is to put each 8 bits on the BL channel and 82 channels of the 2B+D format as described above.

Next, an outline of the program data transfer procedure will be explained.

When all the telephones are connected to the exchange 21 and the exchange 21 is powered on, the digital subscriber circuit 27 provided in the exchange 21 starts initialization processing. In this initial setting process, first, a status report command (hereinafter referred to as an ENQ command) is sent to each telephone. For example, assume that an ENQ command is sent to the telephone 23 via the digital line interface section 112. telephone 2
3 diagnoses its own state according to the sent ENQ command, and if it is found to be in an initial state, that is, a state in which program data has not been activated yet, it sends a program data request command to the digital subscriber circuit 27 in the exchange 21. (hereinafter referred to as IPLREQ command) is sent. When the digital subscriber circuit 27 receives the IPLREQ command, it transfers the program data to the telephone set 23 in accordance with the received IPLREQ command.

phone! After sending the ENQ command to s23, phone 2
4. Next, send the ENQ command to the telephone 25, and so on. Digital line interface section 11
When the ENQ command is sent to the telephone 24 via 3,
The telephone 24 performs a self-diagnosis according to the sent ENQ command, sends an IPLREQ command to the digital subscriber circuit 27, and then transfers the program data. The program data is then transferred to other telephones in the same manner. Note that when an error occurs, the process is temporarily stopped and an ENQ command is waited for.

The ENQ command is periodically sent to each extension telephone even in normal use, and each extension terminal performs a self-diagnosis process according to the ENQ command, and if it is found that the program data is in an initial state where it has not been activated, Automatically sends an IPLREQ command. When the digital subscriber circuit 27 receives the IPLREQ command even in normal use, it transfers program data to the telephone in accordance with the command.

Next, FIGS. 3, 4, and 5 show processing on the telephone side and digital subscriber circuit side.

This will be explained in detail based on FIGS. 6 and 7.

FIG. 3 is a detailed block diagram of the communication control section within the telephone. In FIG. 3, 31 is a transmission buffer for transmitting data in 2B+D format. In this embodiment, only the D channel is used for signals other than voice information sent from the telephone to the exchange, so the transmission buffer 31 is composed of only 2 bits for the D channel. 37 is a parallel-to-serial converter that converts parallel data from the transmission buffer 31 into serial data. Reference numeral 32 denotes a status register for storing information indicating the status of each part, and various information is supplied from the status register 32 to a microprocessor (not shown) via a data bus. A control register 33 stores each control signal sent from the microprocessor via the data bus. 39 is a parallel-to-serial converter that converts data sent serially from the exchange side into parallel data. 34, 35, and 36 are receive buffers that temporarily store data sent from the exchange side, of which 34 is a buffer corresponding to 2 bits for the D channel (hereinafter referred to as buffer A), and 35 is a buffer corresponding to 2 bits for the Bl channel. Buffer corresponding to 8 bits (hereinafter referred to as buffer B)
36 is a buffer (hereinafter referred to as buffer C) corresponding to 8 bits for 82 channels. 310 and 311 are a flag detection unit that directly receives the serial data sent from the exchange side and detects the flag (FE) attached to the ENQ command, and the flag (θeθθ) attached to the program data. ).Hereinafter, 310 will be referred to as flag detection unit A,
311 is a flag detection section B.

Reference numeral 38 is a control unit that performs control related to transfer of program data. Among various signals from the control unit 38, Tx
R, RxR1, RxR2, PE are written in the status register 32, and among the signals sent to the control unit 38, TxE,
RxEl and RxR2 are read from the control register 33. Note that TXR is a D channel transmission ready signal, RXRI is a D channel reception ready signal, and RxR2
is a B channel reception ready signal, and PE is an error generation instruction signal. In addition, TXE is a D channel transmission enable signal, RxEl is a D channel reception enable signal,
RxR2 is a B channel reception enable signal.

Figure 6 shows the microprocessor in a digital telephone.
2 is a flowchart showing a processing procedure.

After turning on the power, the program transfer process begins. In the program transfer process, the microprocessor first turns on RXEI via the control register 33, and then
Instruct the receiver to take a receiving position.

The microprocessor then monitors the status register 32 and waits for RxR1 to turn ON. Among them, an ENQ command is sent from the digital subscriber circuit 27 in the exchange.

When flag detection unit A detects the flags “FEHE, LII” of the frame shown in FIG. 5(C), the information is notified to control unit 38, and control unit 38 then receives The data is latched into the reception buffer A, and when the process is finished, the control unit 38 turns on RxR1.When the microprocessor detects that RxR1 has been turned on, it reads the data latched into the reception buffer A. Then, when the data reading operation of the microprocessor is completed, RxR1 returns to OFF.Then, if the data read by the microprocessor is an ENQ command, RxEl, which was previously turned ON, is turned OFF. Return and turn on TXE.However, if it is data other than ENQ command, wait for RXRI to turn on.

After turning on TxE, the microprocessor monitors the status register 32 and waits for TxR to turn on.

The control unit 38 transfers the initial data “FFHix” stored in the transmission buffer 31 to the parallel-to-serial conversion unit 37,
Then turn on TxR. The microprocessor that detects this writes the frame flag 'FEHEXJ' shown in FIG. 5(C) into the transmission buffer 31. At this time, TxR is turned off. When all of the initial data 'F
FBI4IK" is transferred to the parallel-to-serial converter 37, and TXR is turned ON. When the microprocessor detects that TXR is turned on, it writes an IPLREQ command to the transmission buffer 31 and turns off TxE, which was previously turned on.

Next, the microprocessor turns on RxR2,
Wait for program data to be received. When the flag of the frame shown in FIG. 5(d) is detected by the flag detection unit B, the information is notified to the control unit 38, and the control unit 38 transfers the program data received at the next frame timing to the reception buffer A. and is latched into reception buffer B.

At the same time, a parity check is performed, and if an error occurs, PE is turned on and RxR2 is turned on. If there is no error, PE remains OFF and only RxR2 is turned ON. When the microprocessor detects that RxR2 is turned on, it reads the data in the receive buffers A and B and transfers them to the RAM 14. At this time, if an error occurs, that is, if PE is turned on, the microprocessor turns on the PE flag in the internal RAM. Furthermore, if the received data does not reach the specified number of bytes, the next data is received after waiting for Rx R2 to turn ON again. Furthermore, if a timeout occurs, that is, if the program data transfer is not completed within a certain period of time after sending the I PLREQ command, RxR2 is turned OFF and the process is restarted from the beginning.

When it is determined that the received data has reached the specified number of bytes and the transfer of the program data has been completed, RxR2 is turned OFF, the PE flag is turned ON, and errors are detected based on the received Fe2 data. Check.

If it is confirmed that the data has been received normally, the digital telephone starts operating based on the program data in the internal RAM 14. If an error is detected, the above process is repeated from the beginning.

Next, the detailed configuration of the digital subscriber circuit 27 will be explained.

FIG. 4 is a detailed block diagram of the digital subscriber circuit 27. In FIG. 4, reference numeral 40 denotes a surface difference converter that converts data serially sent from the digital telephone side into parallel data, and 41 represents a reception buffer that temporarily stores data from the surface difference converter 41. Reference numeral 42 denotes a status register for storing information indicating the status of each part, and various information is supplied from the status register 42 to a microprocessor (not shown) via a data bus. A control register 43 stores each control signal sent from the microprocessor via the data bus. 44
．． 45 and 46 are transmission buffers for transmitting data in 2B+D format, of which 44 corresponds to 2 bits for the D channel, 45 corresponds to 8 bits for the 81 channel, and 46 corresponds to 8 bits for the 82 channel. Below 4
4, transmission buffer A 145, and transmission buffer B 146, transmission buffer C. 47 is a parallel-to-serial converter that converts parallel data from each transmission buffer into serial data. 4
8 is a flag detection unit that directly receives serial data sent from the digital telephone and detects the flag (FE) attached to the IPLREQ command from therein. 49 is a control unit that performs control related to the transfer of program data. Among the various signals from the control section 49, TxR (transmission ready signal) and RxR (reception ready signal) are written in the status register 42, and among the signals sent to the control section 49, TxE (transmission enable signal) ) and RXE (reception enable signal) are read out from the control register 43. 411 is a selector unit that switches to the digital line interface of the target extension.

FIG. 7 is a flowchart showing the processing procedure of the microprocessor within the digital subscriber circuit 27. After power is turned on, the microprocessor begins program transfer processing. In the program transfer process, the microprocessor first controls the selector section 411 via the control register 33 to connect it to the digital line interface of the target extension, and also turns on TxE via the control register 33. After that, the microprocessor monitors the status register 42 and turns on TxR.
Wait until it becomes. The control unit 49 converts the initial data rFF14ELl provided in the transmission buffer A in advance into the parallel-to-serial conversion unit 4.
Transfer to 7. Initial data r F F to parallel-to-serial converter 47
TxR is OFF until all HKXJs are transferred, but TXR is turned ON when the transfer is completed. The microprocessor detects this and sends it to the sending buffer A (see Figure 5).
The flag of the frame shown in C) 'F El-1tx
”. When all the flags "FEgtχ" newly written in the transmission buffer 31 are transferred to the parallel-to-serial converter 47, TxR is turned ON. The microprocessor detecting this writes the ENQ command to the transmission buffer A, and when it is completed, the TxE of the control register 33 is sent.
OFF, and D channel reception enable signal R
Turn on xE. When the flag detection unit 48 detects the flag 'FE l4tx' of the frame shown in FIG. 5(C), it notifies the control unit 49 of this fact. Control unit 49
Then, the data received and stored in the parallel converter 40 is latched in the reception buffer 41, and the D channel reception ready signal RxR is turned ON. When the microprocessor detects that RxR is turned on, the receive buffer 4
Read the data latched to 1. When data reading is completed, RxR returns to OFF.

At this time, if the read data is an I PLREQ command, the microprocessor turns off RXE and Tx
Turn E ON. On the other hand, the read data is IPLRE
If it is not a Q command, the microprocessor - Rx
Wait until R turns ON and receive the next data. If it is not received within a predetermined time and a timeout occurs, RWE is turned OFF, processing for the extension is ended, and the digital line interface of the next extension is switched to start similar processing.

After turning on TXE, the microprocessor monitors the status register 42 and waits for TXR to turn on. T
When XR is turned on, the microprocessor writes rFF 甦 3 as parity to sending buffer A, “00I4 冨 ” to sending buffer B, and “0OI4 to send buffer C.”
1x” is stored. That is, this portion becomes a flag in the frame shown in FIG. 5(d). When the storage process starts, TxR turns OFF, but once it is completed, TxR turns OFF again.
It becomes N. When TXR is turned ON, the microprocessor calculates the parity of the 2-byte data (data 1, data 2) read from ROM2, stores it in the transmission buffer A, and also stores the parity of the 2-byte data (data 1, data 2) read from ROM2. 2) are stored in transmission buffer B and transmission buffer C, respectively. Then, by repeating this process, as shown in Fig. 5(d).
The frame shown in is transferred. As mentioned above, RO
Data read from M2 1. Data 2 is control program data for the digital telephone connected to the extension line,
Through the above processing, the control program data is sent to the digital telephone.

Effects of the Invention As described above, the present invention provides a control program requesting means for sending a control program request signal to an extension terminal via a data transmission means, and allows the main device to receive control from an extension boat via the data transmission means. By providing a control program sending control means that sends control program data from the same extension boat when a program request signal is input, each extension terminal is individually controlled when necessary according to the status of each extension terminal. This can be done by sending program data. In other words, if the control program data of some extension terminals is corrupted for some reason, or if the power line from the main unit to the extension terminal is cut off and the control program data in RAM is lost, etc. , the control program data can be sent again only to that extension. Moreover, when an extension terminal is moved, multiple terminals are removed from the main unit at the same time, but when sending control program data to the multiple terminals that have been moved, a number is sent from the main unit that specifies the corresponding extension. There is no need to input the control program request signal, but by checking the extension boat from which the control program request signal was sent,
The main device can identify by itself the extension terminal to which the control program data is to be sent.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a telephone device in an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the telephone device, and FIG.
The figure is a circuit diagram of the main part of the extension telephone of the same telephone device, and FIG. 4 is a circuit diagram of the digital subscriber circuit in the main device of the same telephone device.
FIG. 5 is a diagram showing a data frame of the telephone device, and FIGS. 6 and 7 are flowcharts showing the control procedure of the telephone device. 21... Main device 22... Call path switch unit 23... Digital telephone 12... Microprocessor part 13... IPLROM 14... RAM 15.
...Communication control section 16...Digital line interface section 17.
...Telephone circuit section 12...Microprocessor part 22...Digital subscriber circuit 111...Communication control section 112...Digital line interface section l1
6-ROM 117・ROM20... Name of agent for part of microprocessor Patent attorney Toshio Nakao and one other person Figure 1 Figure 2 System program M1 Figure 3 Figure 4 Date of delivery to the data sheet Wholesale capital details 7
Sl

Claims (1)

[Claims] A main device is provided with a data transmission means and a memory for storing control program data for the extension terminal; It has a plurality of extension terminals equipped with a memory storing an interpreter for decoding the control program data that has been received, and a read/write memory for storing the control program data, and the extension terminals are equipped with A control program requesting means is provided for sending a control program request signal requesting control program data to the main device side via the data transmission means, and when the control program request signal is input to the main device via the data transmission means, A telephone device comprising a control program sending control means for sending control program data from an extension port into which a control program request signal is input.