JPH0746817B2 - Telephone terminal message communication system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a telephone terminal message communication system capable of performing message communication simultaneously with telephone exchange.

[Technical background of the invention and its problems]

Telephone, facsimile, etc. are communication media that support the information-oriented society. Although these techniques are very good,
There are also drawbacks. For example, although the telephone is the most widely used and convenient device, it can transmit only voice, and the service provided by the system is limited. This was the same for fax machines.

There is voice mail as a new service provided by telephone. This voice mail is excellent in that the caller can transmit information regardless of the state of the called party, but it uses the medium of voice used by the telephone, and shows how to use the telephone differently. Not too much, and the service was insufficient.

Also, using one of these phones with an indicator,
A service was conceived in which information was transmitted by sending a message to the other party's telephone and displaying the message on this display. However, since the message used here is fixed, more information content is required for the message content, while a message without delay in message transmission time is required.

[Object of the Invention]

The present invention eliminates the above-mentioned drawbacks, makes it possible to use a medium other than voice, a message provided for display, and a more specific message by the most widely used telephone. An object of the present invention is to provide a telephone terminal message communication system capable of reducing the amount of transmission and shortening the transmission time.

[Outline of Invention]

The present invention performs message communication using a telephone terminal having a display function. That is, the display means,
A telephone exchange system for performing message communication, comprising a plurality of telephone terminals having in common a storage means for storing a correspondence between a fixed message and an identifier for identifying the fixed message, wherein the calling telephone terminal supports the fixed message. Specifying means for specifying the identifier, input means for inputting the variable message, and transmitting means for transmitting the identifier and the variable message, and the receiving telephone terminal includes receiving means for receiving the identifier and the variable message, The control means reads the fixed message from the storage means based on the identifier and displays the fixed message and the variable message as a series of messages on the display means.

〔The invention's effect〕

According to the present invention, when transferring a message, since the identifier and the variable message are transmitted on the line, the receiver can be informed of a more specific message, so that the receiver can take more appropriate measures. In addition, since the identifier is used for the fixed message among the messages, the transmission amount can be reduced, and the transmission time can be shortened.

For example, in the case of sending the message "Imaimagatsutsuchu 3:00 Kisha", "3:00" is transmitted not as an identifier but as a variable message such as a character.

If the exchange is equipped with a setting identifier storage means, the connection between the terminal that originated the message and the exchange can be cut off regardless of the state of the called terminal, and the line utilization efficiency increases. To do.

Further, it is preferable to use the control signal line assigned to the telephone terminal (the line other than the line assigned to the voice signal) for transmitting the identifier. At this time, when the control signal and the voice signal are transmitted in time division as a line, it means transmission at the timing assigned to the control signal.

Example of Invention

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

The system according to this embodiment is shown in FIG. This system is a telephone terminal equipped with a display (hereinafter referred to as a telephone terminal, in principle, this type).
(11) and exchange system (13).

In this system, when a message is instructed to be input at one telephone terminal (11), the message is transferred and displayed to another telephone terminal (11). When the message is transferred when the message is directly sent from one telephone terminal (11) to the other telephone terminal (11), or from the other telephone terminal (11) to the one telephone terminal (11) In the case of a call to.
Regarding the transfer of the message, one of the features of the present invention is that an identifier is used as described later.

Next, each system will be described in detail. First, exchange system (13)
Includes a line card (15) for guiding the telephone terminal (11) to the switching system (13), as shown in FIG. The line card (15) and the telephone terminal (11) are connected by a two-wire bidirectional burst transmission (ping-pong transmission) as described later. The power supply line is omitted in FIG. For the same line card (15), multiple (2-
Four telephone terminals (11) are connected.

A PCM highway (17) extends from the line card (15) to a time switch circuit (19). In this time switch circuit (19), not only the line card (15) but also the trunk card (21), tone circuit (23) and conference circuit (25) are included in the PCM highways (27), (29), (31). Connected through. Voice or data signals are on the PCM highway.

The time switch circuit (19) is a PCM highway (17),
The time slots of the signals on (27), (29), and (31) are changed.

The trunk card (21) is a card to which a local line, a private line, etc. are connected. The tone circuit (23) sends various tones to the telephone terminal (11) and the office line. Various tones
It is supplied from this circuit (23) as a digital signal.
The conference circuit (25) is for performing calculations when making a call with three or more tables. The line card (15), the time switch circuit (19), the trunk card (21), the tone circuit (23), and the conference circuit (25) are supplied with the reference clock from the clock generator (26) to operate. Stipulated.

A pair of control lines are connected to the line card (15), the trunk card (21), the tone circuit (23), and the conference circuit (25). The other end of the control line is connected to the I / O (33).

A common bus (35) is provided for the I / O (33),
A CPU (37), a floppy disk (FD) (39), a memory (41), and an input / output circuit (43) are hung on this common bus (35). The floppy disk (39) stores the exchange control operation program and various data. The contents stored in the floppy disk (39) are loaded into the memory (41) and are stored according to the contents stored in the memory (41).
The CPU (37) operates. Floppy disks (39)
Are used for backup of the memory (41).

A data terminal (45) is connected to the input / output circuit (43). The data terminal (45) is used for customer data and input, which will be described later, and maintenance. The customer data is attribute information such as a type of telephone terminal, a telephone number, and a function assignment of keys in a multifunction telephone. Further, in this embodiment, a message is also input from this data terminal (45).

Next, a transmission method between the telephone terminal (11) and the line card (15) will be described. As described above, in this embodiment, the two-wire bidirectional burst transmission system is used.

In this system, signals are transmitted and received like a ping-pong between the telephone terminal (11) and a switching system (line card (15)). As shown in FIG. 3, a signal of a predetermined format is transmitted from the line card (15) to the telephone terminal (11) in a burst form. On the other hand, a signal is transmitted in burst form from the telephone terminal (11) to the line card (15). This 12
Perform within 5 μsec.

Next, the signal format in this transmission method will be described.
As shown in FIG. 4, 12 bits form one frame. The first 1 bit is a frame synchronization bit (F),
The next 8 bits (V) are assigned to the audio signal. Subsequently, 1 bit (D) is assigned to the data, 1 bit (C) is assigned to the control signal, and the last 1 bit is the parity (P).
It is for. If we look only at the audio signal, 8 bits will be transmitted every 125 μsec, and 64 Kbps PCM real-time transmission is being implemented.

The data (D) is used when a data terminal or the like is connected to the telephone terminal (11) and data transmission is simultaneously performed using the telephone line. When voice transmission is not performed, the voice signal bit (V) may be used. Control signal bit (C)
Is a signal for controlling the telephone terminal (11),
One unit consists of 12 bits. That is, a signal of the format shown in FIG. 4 is received 12 times, and 12 control bits C are accumulated to obtain the control signal shown in FIG. 5 (12 multiframe structure). On the contrary, the transmission may be divided into individual bits and transmitted. Parity (P) is a bit for parity check.

As described above, the two-wire bidirectional burst transmission (ping-pong transmission) is adopted as the transmission method between the telephone terminal (11) and the line card (15). It is phase encoded. Diphase encoding changes the level in synchronization with the clock, and
The encoding is such that the signal level of "1" is constant in the same clock section, and the signal level of "0" changes in the same clock section. A specific example in which the DP signal sequence is defined for the NRZ signal sequence is shown in FIG.
It shows in (b). It should be noted that the NRZ signal here simply means that the duty ratio is expressed as 100% with respect to the data. Therefore, the NRZ signal sequence here is the telephone terminal (1
1), it can be considered as digital data in the line card (15). The necessary hardware configuration will be described later.

Next, the telephone terminal (11) will be described in more detail. The external appearance of the telephone terminal (11) here is as shown in FIG.
The major feature is that it has 1). Soft keys (53) to (63) are provided below the LCD (51). 1
Two soft keys (65) are provided outside the LCD (51). The functions of the soft keys (53) to (65) are assigned according to the state of the terminal. In the portion corresponding to the soft keys (53) to (65) in the LCD (51), the name of the function assigned according to the state of the terminal is displayed.

In addition to the soft keys (53) to (65), function keys (67) to (79) are provided. Various functions are programmable assigned to the function keys (67) to (79). This key (67) thru (7
On the right side of 9), L indicating the status of these keys (67) to (79)
ED (81) to (93) are provided. Furthermore, in addition to the function keys (67) to (79), function keys (95) to (101) are provided. The function keys (67) to (79) and (95) to (101) are fixedly assigned with a fixed function, for example, a function such as auto dialing, which has a property of being assigned according to the state of the terminal. Not a thing.

A dial pad (102) is provided at the center of the upper part of the housing of the telephone terminal (11). A speaker (103) and a handset (105) are provided on the upper left side of the housing. The handset (105) is connected to the housing via a cord (107). Such a telephone terminal (11) is connected to the exchange (line card (15)) via the telephone line (109).

Next, the electronic configuration of the telephone terminal (11) will be described with reference to FIG. Here, the data terminal (11
1) connect and drawphone tablet input device (1
An example including 13) will be described.

The terminal (11) includes a ping-pong transmission system (115), a voice system (117), an operation system (119), and a processing system (121).

The ping-pong transmission system (115) sends and receives signals to and from the telephone line (109), and further exchanges voice data with the voice system (117) to process digital data into the processing system (121) and the data terminal (1).
11) The voice system (117) converts a digital signal into voice. The operation system (119) can be considered as a man-machine interface between the operation table and the processing system (121). The processing system (121) performs a certain process on the data and controls the operation of the entire terminal (11).

The voice system (117) includes a handset (105) and a speaker (103).
including. This audio system (117) is a CPU in the processing system (121).
The PCM audio data from the ping-pong transmission system (115) is converted into an analog audio signal by the codec & filter (127) under the control of (125) and the control of the timing signal T ₂ (described later). This analog audio signal is sent to the handset (105) or speaker (loudspeaker) via the buffer amplification circuit (129) and becomes an audible sound. Codec
Is a PCM code / combiner having both functions of an encoder (coder) and a decoder (decoder). The CPU (125) controls the codec & filter (127) via the common bus (123) and the audio I / O (131).

The analog audio signal sent from the handset (105) is sent to the sending frame register (133) of the ping-pong transmission system (115) via the codec & filter (127). The output of the transmission frame register (133) is sent to the parity addition circuit (135). Parity addition circuit (135)
Is sent to the NRZ / DP conversion circuit (137) and sent to the telephone line (109) via the hybrid (139). The above is the transmission part of the ping-pong transmission system (115). On the other hand, during reception, the output from the hybrid circuit (139) is supplied to the DP / NRZ conversion circuit (141). The output of the DP / NRZ conversion circuit (141) is the reception frame register (143).
Sent to. The reception frame register (143) has areas for audio signals (V), data (D), and control signals (C). Number of bits 8 bits, 1 bit, 1
Is a bit.

Of the reception frame register (143) for audio signal (V)
The area data is input to the codec & filter (127). Similarly, the data in the (D) area for data is I / O (R
S232C) (145) to the data terminal (111). The data in the control signal (C) area is sent to the 12-bit shift register (SR) (147). The transmission frame register (133) also has a similar structure, and includes an 8-bit audio signal (V) region, a 1-bit data (D) region, and a 1-bit control signal (C) region. The output of the above codec & filter (127) is the transmit frame register (1
Input to the (V) area for voice signal of 33). The data terminal (11) is connected to the data (D) area via the I / O (145).
Enter the data from 1). The output from the 12-bit shift register (149) is input to the control signal (C) area. The 12-bit shift registers (147) and (149) are connected to the common bus (123).

Next, the operation will be described. The 8-bit PCM audio signal from the codec & filter (127) is sent to the transmission frame register (1
It is temporarily stored in the voice signal (V) area in 33). On the other hand, control data is sent in 12-bit units from the CPU (125) and is temporarily stored in the 12-bit shift register (149) via the common bus (123). The 1-bit data from the 12-bit shift register (149) is stored in the control signal (C) area. Data is transmitted from the 12-bit shift register (149) once every 125 μsec. This is controlled by the timing signal T ₁ . Data from the data terminal (111) is stored in the data area (D) via the I / O (145). The data transmission from the I / O (145) is also controlled by the timing signal T ₁ .

In this way, when 10-bit data is prepared, the parity addition circuit (135) adds 1 bit each of the frame synchronization bit (F) and the parity bit (P). This format is similar to the format shown in FIG. This data shows a duty ratio of 100%
Is output in the form of. This is NRZ (Non-Retarn-To Zer
o) It has the same format as the signal. This signal sequence is subjected to diphase coding in the NRZ / DP conversion circuit (137). Then, through the hybrid circuit (139), the telephone circuit (10
9).

At the time of reception, the signal that has been subjected to the diphase coding from the hybrid circuit (139) is converted into an NRZ signal string in the DP / NRZ conversion circuit (141). This signal is in units of 12 bits, the frame synchronization bit (F) and the parity bit (P) are excluded, and the data from the second bit to the ninth bit is stored in the audio signal (V) area. Next, the 10th bit is in the data (D) area and the 11th bit is
It is stored in the control signal (C) area.

Data in the audio signal area is codec & filter (12
It is input to 7) and converted to audible sound as described above. The data in the data area is sent to the data terminal (111) via the I / O (145). The data in the control signal area is sent to the 12-bit shift register (147), and if 12 bits are accumulated, it is sent to the CPU (125) via the common bus (123).

The operation system (119) includes an LCD controller (151) that drives and controls the LCD (51). Key input information from the dial pad (102), soft keys (53) to (65), function keys (67) to (79), (95) to (101) is I / O.
(153) is transmitted to the CPU (125) via the common bus (123). Further, the CPU (125) which has obtained the information about the operation states of the function keys (67) to (79) performs a predetermined process and causes the LED drive system (155) to perform a predetermined LED (81) to (9).
3) Give an instruction to display.

The CPU (125) performs a predetermined process according to the program stored in the ROM (157). In addition, the data terminal (111) is I / O
Data is exchanged via (145) and I / O (159). Input pattern information from the drawing phone tablet input device (113) is transmitted to the CPU (125) via the I / O (159).

Next, the NRZ / DP conversion circuit (137) and the hybrid circuit (13
9), the specific configuration of the DP / NRZ conversion circuit (141)
It will be described with reference to the drawing. These circuits (137), (139),
(141) is a telephone circuit (109) and a hybrid coil (16).
1) electrically connected via. The NRZ / DP conversion circuit (137) is a transmission section (163) and the DP / NRZ conversion circuit (141) is a reception section (165).

With this configuration, the signal from the telephone line (109)
Obtained as digital data, the digital data is subjected to diphase coding and transmitted to the telephone line (109).

Next, the operation clock of the telephone terminal (11) will be described. In this embodiment, the operation clock is obtained from the frame detection circuit (167) and the timing control circuit (169) shown in FIG. That is, the frame synchronization bit is detected from the signal received by the frame detection circuit (167),
A clock signal is generated in synchronization with this detection timing.

It generates timing signals T _{1 to} T ₄ from a clock signal from a clock generator (not shown) (provided in the timing generation circuit (169)) in response to the above frame detection. Timing signal T ₁ is 8kHz, timing signal T ₂ is
64kHz, timing signal T ₃ is 256kHz, timing signal T ₄
Is a 2 MHz clock signal. Further, as described above, the transmission frame register (133) has a codec &
Since data is written from the filter (127), I / O (145) and 12-bit shift register (149) and read to the parity addition circuit (135), it is necessary to shift the phase for this writing and reading. Of course there is. The same applies to the reception frame register (143).

Next, the line card (15) will be described with reference to FIG. This line card (15) is a hybrid circuit (20
1), a transmission / reception circuit (203), and a reception frame register (205).

The hybrid circuit (201) and the transmitting / receiving circuit (203) have the same configurations as the specific configurations shown in FIG. That is,
The signal of the telephone line (109) is decoded and converted into an NRZ signal, and conversely the NRZ signal is converted into a diphase signal (DP signal). Here, the NRZ signal may be considered the same as digital data. The signal that has been subjected to the diphase encoding is subjected to the frame sync bit (F) detection in the sync signal detection circuit (204), and the NR is detected based on this signal.
The Z signal is loaded into the reception frame register (205).
At this time, the 2nd to 9th bits of data from the beginning (counting from the frame synchronization bit (F)) are stored in the audio signal area. The 10th bit data is stored in the data area. The 11th bit data is stored in the control signal area.

Next, the data in the audio signal area and the data area are transferred to the registers (207) and (209). This register (20
A multiplexer (213), a counter (215), and a comparator (217) are provided for 7) and (209).

The registers (207) and (209) send the stored data to the multiplexer based on the clock signal. This clock signal is supplied through the clock signal line (219) from the clock generator (26) shown in FIG. This clock signal is also supplied to the counter (215), and the counter (2
It is counted in 15). The counter (215) is initialized by a PCM frame synchronization signal. This PCM frame sync signal is sent to the I / O (33) via the frame signal line (221).
Sent from. Although omitted in FIG. 2, it may be considered that the PCM highway (17) and the like are provided together. Therefore, the counter (215) counts the clock signal from the beginning of the PCM frame and the comparator (21
In 7), the match with the predetermined value is detected. This predetermined value is a unique address determined for each line card, and is also a time slot number assigned to each line card (or telephone terminal (11)) as described later. . When a plurality of telephone terminals (11) are set for the line card (15), the comparator (217)
If the unique address and the count clock signal number match,
This result is notified to the multiplexer (213) and the demultiplexer (223) described later. Multiplexers (213)
In response to this, the contents of the registers (207) and (209) are multiplexed and sent to the PCM highway (17). This PCM highway (17) has a time switch circuit (1
9) connected to.

On the other hand, the control signal stored in the control signal area of the reception frame register (205) is stored in the 12-bit shift register (21
Accumulated in 1). When 12 bits are accumulated, it is sent to the CPU (227) via the bus (225) as one control signal. The CPU (227) decodes the data according to the contents stored in the memory (229) by a certain process and, if necessary, sends the contents to the data highway (233) via the I / O (231). The data sent to the data highway (233) is sent to the CPU (37) and subjected to predetermined processing.

The above is the transmission from the telephone terminal (11) to the exchange side.
Next, transmission from the exchange side to the telephone terminal (11) will be described. The PCM audio data sent via the PCM highway (17) is time division multiplexed. This data is taken into the line card (15) in the demultiplexer (223). As mentioned, each line card (15)
Is assigned a unique address, which is also the number of the time slot assigned to each line card (15).

As described above, the comparator (217) checks the match between the clock value counted from the start of the PCM frame and the unique address, and when they match, the demultiplexer (22
Inform 3) of this result. Demultiplexer (223)
In response to this, the received PCM signal is separated into voice and data and transferred to registers (235) and (237), respectively. The registers (235) and (237) operate by receiving a clock signal from the clock signal line (219).

The data sent via the data highway (233) is the data required for exchange control,
It is distinguished from the data transmitted via the M highway (17). The data sent via the data highway (23) is sent to the CPU (227) via the I / O (231) and is further stored in the register (239).

Next, the contents of the registers (235), (237) and (239) are transferred to the transmission frame register (241). The transmission frame register (241) is divided into three areas: the reception frame register (205) or the telephone terminal (1
It is the same as the reception frame register (133) in 1).
The contents of the transmission frame register (241) are sent to the transmission / reception circuit (203). In this circuit (203), the data is subjected to diphase coding and sent to the telephone line (109) via the hybrid circuit (201).

Next, message communication will be described. In this embodiment, the message is separated into a fixed part and a variable part, and the former is represented by an identifier. Further, this embodiment has one feature in that message communication is mainly performed by the above identifier.

The correspondence between the identifier and the fixed part of the message (hereinafter referred to as the fixed message) is set, for example, as shown in Table 1 (hereinafter referred to as the identifier table).

In the fixed message in Table 1, the underlined part is the variable part of the message. In this way, the reason why the message is divided into the fixed part and the variable part is that the messages required in daily life and work are patterned. The variable part is not always necessary.

This identifier-fixed message correspondence is stored and stored in at least all of the telephone terminals with a display (11).
There are two ways to remember this. One is for storing in ROM, and the other is for storing in RAM. In the first embodiment, an example in which the above correspondence is stored in the ROM will be described.

Since the ROM is a read-only memory, it is necessary to store the above correspondence in advance and prepare for each terminal (11). In this case, it is not always necessary for the exchange side to have this correspondence in advance, but in this case the RO at the terminal (11)
The same storage content as M is stored in the memory (41) or the floppy disk (39). The initial input will be described later.

Next, message communication will be described. There are two modes of message communication in this embodiment, a message setting request mode and a message sending request mode.
The message setting request mode is used when the operator of the telephone terminal (11) is absent and cannot respond to the telephone (11) thereafter.
The advance message is set, and when a call is made from another terminal (11), the above message is transferred to this calling party. Message sending mode is other terminal (11)
When a called party does not respond to a call to the called party, a message is sent to the called party.

First, the message setting request mode will be described. To perform this mode, first press the key (65) on the telephone terminal (11).
To operate. This key (65) is a message setting / selection key. First press this key (65)
The CPU (125) detects this operation state and enters the message setting mode. In this mode, the CPU (125) calls the contents of the identifier “1” from the identifier table, and the LCD (51)
To display. Here, "Geishtsu, waistcoat" corresponding to the identifier "1" is displayed. The operator presses the message setting / selection key (65) since this is not the message that is needed now. Then, the content of the identifier "2" is displayed. The same operation is repeated thereafter, and when the content of the identifier "5" is displayed, the operator presses the confirmation key. As a confirmation key, the dial pad (102) You can use the function keys (67) to (7
9), (95) to (101) may be appropriately selected and set, or a function may be assigned to one of the soft keys (53) to (63). This completes the fixed message settings.

Next, the variable message “03:00” is input. this is,
Press the dial pad (102) and "0""3""0""0". The CPU (125) uses this “0” “3” “0” “0”
Is displayed at 03:00 in the underlined area in the message displayed on the LCD (51). Then, "Kaijichu 03:00 Made" is displayed. At this time, CPU (12
5) The RAM (156) has an identifier "5" and a variable message "0".
Memorize "300" as "50300". At the same time, this "50
"300" is sent to the exchange as data. This will be described in more detail. The transmission of this data is performed in the same manner as the transmission of the control signal of the telephone terminal (11). Since the ping-pong transmission system is used in this embodiment, the control signal bits in the format shown in FIG. 4 are used. Further, the data itself used here is 12 bits and is a unit.

First, the CPV (125) sends a message setting request to the exchange. An example of this setting request is shown in FIG. 12 here
Although it is one unit in bits, C ₀ is a frame synchronization bit, C ₁ and C ₂ are bits indicating the meaning represented by the 12-bit data, C _{3 to} C ₁₀ are data to be transmitted, and C ₁₁ is parity. It is a check bit (even number in this example). like this
The 12-bit data is sent from the CPU (125) to the 12-bit shift register (149) (shown in FIG. 8) and sent to the exchange by the procedure described above. Then, the message identifier number, variable data (time in message, date, etc.), and message setting end are sent.

On the exchange side, the above data is stored in the line card (1
Received in 5) and sent to CPV (37). After receiving and recognizing the message setting request, the CPV (37) recognizes the message identification number and variable data and stores them in the message registration area of the memory (41).

The structure of the message registration area of the memory (41) will be described. In this embodiment, the message registration area is configured with port support and customer data also taken into consideration. A concrete example of this is shown in FIG. The port means, for example, an output terminal on the terminal (11) side of the line card (15) in FIG. When referring to a port number, a number obtained by adding 2 bits to the above-mentioned unique address may be used here.
The customer data are attributes such as the type, state, telephone number, and key function allocation of the telephone terminal (11). The type of the terminal (11) is a normal dial telephone, a touch-tone telephone, a telephone with a display, a telephone with a data terminal (for example, a computer telephone), or the like. The state of the telephone terminal (11) is a level concept used in the state transition diagram, and as shown in FIG. 13 and Table 2, the state of the terminal (11) from the viewpoint of exchange control. Is. This embodiment is characterized in that the state "7" is provided with a state "message set".

A message during setting is stored for such customer data corresponding to the port. The set message consists of a fixed data part consisting of an identifier and a variable data part.
Here, the identifier is "5" and the variable data part is "0300".

When the inside of the exchange is set in this way, it is assumed that a call is made to the message sending terminal (11) from a terminal (11) other than the terminal (11) sending the message. CPU in switchboard
(37) receives a call from the terminal (11) and searches for customer data corresponding to the port. This search checks the state of the called terminal. If the status is "0", the line is connected, but here the terminal "" is in the status "7" and the CPU (37) recognizes that the message is being set. After that, the setting message is called and the data "50300" is sent as control data to the calling terminal.

The sending procedure at this time is the same as the sending procedure from the terminal (11) to the exchange when the message is set.
(37) sends the control data to the calling terminal via the line card (15) in the format shown in FIG. As described above, the ping-pong transmission method is used between the line card (15) and the telephone terminal (11).

After recognizing the control data, the CPU (125) of the terminal which has received the message transfer calls the contents of the identifier table from the memory (157) using the identifier. In this case, "Kaikichu: Made" corresponding to "5" will be called. However, when memorizing the identifier table, "
The character corresponding to "Made" may be stored as it is, or a character generator may be separately prepared and the character code may be stored.

Next, the CPU (125) displays the called fixed message and variable data on the LCD (51). In this way, the message "KAIGI CHOU 03:00 Made" is displayed on the calling terminal, and the message is transferred and displayed. At the same time as such a display, the number of the called terminal, the called terminal operator, etc. may be displayed.

Next, the message transmission request mode will be described. This is a mode necessary for making a urgent contact even when the called terminal is busy. For example, when the secretary wants to contact the boss as soon as possible and inform the customer.

In such a case, the tone circuit (23) of the exchange sends a busy tone to the calling terminal. When receiving such a busy tone, the CPU (125) of the telephone terminal (11)
The camp-on, automatic call back, recall, message transfer, and interrupt functions are assigned to keys (53) to (63). At the same time, CPO (camp on), ACB (automatic call back), RCL (recall), LMG (message transfer), and OUR are displayed in the areas corresponding to the keys (53) to (63) in the LCD (51).
(Interrupt) is displayed.

The operator then presses the key (59). This softkey (5
9) is the message transfer key in this state,
By pressing this key (59), the message created by the following processing is transferred to the called party. First, the message settings are displayed to the CPU (125).

Similar to the message setting request mode described above, the identifier table is called and the contents of the identifier “1” are displayed.
And the keys (65) and dial pad (102) The fixed part of the message is determined by the operation of. Here, the identifier "6" is selected. In this example, no variable data is needed and the message is first sent to the exchange according to the procedure and format shown in FIG.

When the CPU (37) of the exchange recognizes the message sending request, it sends the data of the format shown in FIG. 15 to the called end as it is as control data of the terminal (11).
By doing so, the message can be transferred even when the called terminal is talking (or in any state), and since the identifier is used, the transfer amount can be greatly reduced.

In the above-described embodiments, the example in which the identifier table is stored in the ROM has been described, but it is naturally possible to store the identifier table in a RAM (Random Access Memory). Moreover, in this case, there is an effect which will be apparent from the following description.

In the following explanation, the identifier-message correspondence is input from the data terminal (45) to the floppy disk (39) in the exchange, and at the same time, the identifier-message correspondence is stored in each telephone terminal (11) in the initial state. Not yet. The hardware configuration is the same as that of the above-described embodiment.

First, the input of the identifier-message correspondence to the floppy disk (39) will be described. Data terminal (4
5) is a maintenance terminal, and when writing a message from this terminal (45), an authorization code is input. For example, when the authorization code is "0003", the following processing is diagnostic, when it is "0002", it is a set of customer data, and when it is "0001", it is
Make a decision such as writing a message.

Here, when the authorization code "0001" is input, the CPU (37) recognizes that the data after this is the identifier number and the (fixed) message. Therefore, this content is the RA of the floppy disk (39) or memory (41).
Memorize in the part composed of M. This memory is
It is not limited to Table 1. In this way, if the correspondence between the identifier number and the message is determined, the stored content is transferred to each telephone terminal (11). However, the concept of transfer is not directly related to when information about the message in the switch is prepared. That is, it goes without saying that the above contents may be stored in the ROM in the exchange.

By the way, it is preferable to transfer the stored contents (correspondence between the identifier number and the message) at power-on of the exchange, connection of a new terminal, change of a message, addition of a new item, and the like. First, the transfer at power-on will be described.

When the power of the exchange is turned on, as shown in FIG. 16, the exchange program stored in the floppy disk (39) and the necessary data (which may include the data about the above message) are loaded. Then, it is stored in the memory (41). Next, an initial program, which will be described later, starts, and after the processing by this program is completed, the supervisor executes I / O processing, exchange processing, background processing, failure processing, etc. in order of priority.

Next, the initial program will be described. As shown in FIG. 17, this program first starts with the processing of initializing the entire hardware, in particular, clearing the memory of the data area. This is because the contents of the initial state of the data area cannot be guaranteed only by the exchange program and loading of necessary data. The data area is a storage area for data on the mounting state of a line card or the like shown below, and the memory is initialized by the above clearing before storing correct data.

Next, the mounting condition of the line card (15), the trunk card (21), etc. is checked. For this purpose, an inquiry signal is sent from the CPU (37) to the line card (15) and the trunk card (21) using the control signal line (data highway). On the other hand, CPU (2
27) sends back a response that it is installed to the CPU (37). For this reply, for example, a unique number given to each line card (15) may be used. As the unique number, a value obtained by omitting the lower 2 bits of the unique address used as the reference value of the comparator (217) shown in FIG. 10 may be used. Here, the reason why the lower 2 bits are discarded is that this unique address is originally set for the telephone terminal (11) (port). In this embodiment, one line card (15) is used. Since the four terminals (11) are supposed to be connected, the line card (15) is identified by something other than the lower 2 bits of the unique address, and the telephone terminal (21) is identified by including the lower 2 bits. Naturally, the terminal (11) connected to the line card (15)
If the number changes, the expression of the unique address also changes, so the expression of the unique number here also changes. A response like this
Confirm the mounting of the line card (15) etc. by receiving the CPU. This allows the CPU (37) to get a map of the card's implementation.

Next, checking the connection state of the telephone terminal (11) will be described. The CPU (37) of the exchange sends the inquiry signal as a control signal to each terminal (11). The format of the inquiry signal in this embodiment naturally follows that shown in FIG. On the other hand, the CPU (125) of the telephone terminal (11)
When receiving the inquiry signal, the inquiry signal is sent to the exchange as a reply, for example, its own unique number. (This will be described later.) The CPU (37) receives this response and creates a map of the mounting state of the terminal (11). FIG. 18 shows an example of the inquiry signal and its response.

In this way, the mounting states of the card (15) and the terminal (11) are checked, and the CPU (37) can complete the mounting map. Next, the CPU (37) is connected to the telephone terminal (1
1) is initialized. By this initialization, the telephone terminal (11) can send and receive. Then CP
The U (37) reads data about the message read from the floppy disk (39) and stored in the memory (41), and sends it to the terminal (11). This data transfer is performed as control data transfer to the terminal (11).

The data format at this time is shown in FIG. The CPU (37) in the exchange first issues a 12-bit message storage request command. This is the CP in the line card (15)
It is received by the U (227) and is temporarily stored in the register (239). After this, using the control signal bit in the ping-pong transmission format, the terminal (1
Sent to 1). In the terminal (11), via the reception frame register (143), 12-bit shift register (147), etc.
It is sent to the CPU (125). By such a procedure, the message storage request, the message identifier number, and the message are sent to the terminal (11) one after another. Terminal (11) CPU (1
25) stores the identifier and the message in the RAM (158). And if you receive a message storage end command,
This process ends.

In this way, the CPU (125) of the telephone terminal (11) stores the sent data in the RAM (156). As a result, the exchange and the telephone terminal (11) have exactly the same identifier and message. This completes the initial program and starts the normal exchange program.

The CPU (37) uses the idle time of the exchange process to update the mounting map in principle at regular intervals. That is, the new terminal (11) is connected, the connection position of the terminal (11) is changed (connection port is changed), and the like. If this is handled as a port, it means automatic change of customer data. Changes in customer data, especially new terminals (1
When 1) is connected to the system controlled by the exchange, the identifier and the message are transferred to the new terminal (11) in the same manner as the above initial program. The new terminal (11) stores the transferred data in the RAM and holds the same data as the exchange and the other terminal (11).

Here, the check as to whether or not the terminal (11) is connected will be described in detail. The exchange periodically makes an inquiry to each port to check whether the terminal is connected or not. When the terminal responds to this inquiry, the exchange recognizes that the terminal is connected to the port. FIG. 21 is a flowchart showing the operation of the exchange when making an inquiry.

Normal (except when the terminal is connected or when the terminal is removed)
The switch makes inquiries to each port in turn. When the terminal is connected to the exchange, the exchange suddenly returns a response from the port that has not been responding until then. In this case, the exchange has 3 ports
The inquiry is repeated, and if there are responses to all, it is recognized that the terminal is connected to the end of the above port.

On the contrary, when the terminal is pulled out (disconnected) from the exchange, from the viewpoint of the exchange, the port that had been returning a normal response suddenly does not return a response. In this case, the exchange sends an inquiry to the same port three times in a row,
If there is no response to all, it is recognized that the terminal connected to the above port has been removed. As an example for explaining the case of newly connecting a multifunction button telephone to the exchange, assume that the multifunction button is connected to the telephone line (109) (position of terminal A in FIG. 2). By the inquiry immediately after the connection, the exchange recognizes that the terminal is connected and sends an identification number transmission request.

On the other hand, under the control of the multi-function button telephone (11) CPU (125), the terminal identification code (unique for each model) fixedly stored in the read-only memory (126) is commonly used as the control signal. Bus (123), shift register (149),
A control signal area (C) of the transmission frame register (133),
It is sent to the exchange side via the parity addition circuit (135), the NRZ / DP conversion circuit (137), the hybrid circuit (139) and the telephone line (109). On the exchange side, when the line card (65) receives this terminal identification code, the line card (15)
Data highway (233), I / O by internal CPU (227)
The terminal identification code and the port number (PN) that received it are transmitted to the CPU (37) of the processing system via (33). The CPU (37) recognizes that a multifunction telephone is newly connected to the above-mentioned port and sets data (customer data etc.) corresponding to the terminal in the memory (41) based on these two pieces of information.

In addition, I / O (33), data highway (23
3), the identification number (different for each terminal) for terminal identification is sent to the multifunction button telephone (position of the terminal A1) via the line card (15) and the telephone line (109). Multi-function button On the telephone side, the above identification number is used for hybrid (139), DP /
NRZ conversion circuit (141), reception frame register (143),
When the telephone terminal CPU (125) receives it through the shift register (147) and the common bus (123), the CPU (125) is stored in the rewritable memory (126) (which may be constituted by E ² PROM). Store the identification number. The contents of this memory are retained even if the telephone terminal is powered down. As a result, the terminal is ready for use simply by connecting the telephone line. The case of moving the multi-function button telephone in use to another place will be described. As an example, telephone line (109A)
Multi-function button telephone connected to the telephone line (109B)
It is assumed that the connection is changed to (moving from the location of terminal A to the location of terminal B). Telephone line (109A), (109B)
Are connected to the ports with the terminal numbers (PN) 1 and 2 of the exchange, respectively. When the telephone is removed from the line (109A), the exchange recognizes that the telephone is removed from the port of PN = 1 by the inquiry as described above. When this telephone is connected to the line (109B), the exchange recognizes by inquiry that the telephone is connected to the port of PN = 2. From the exchange, a number sending request is sent from the port of PN = 2. In contrast, the CPU in the phone
(125) sends it to the exchange as identification number control data stored in the RAM (126). On the exchange side, the above identification number is used for the line card (15), data highway (233), I /
Received by the CPU (37) via O (33). From the identification number, the CPU (37) recognizes that the terminal connected to the PN = 2 port is the multifunction button telephone that has been connected to the PN = 1 port until now. Therefore, the data (customer data, etc.) corresponding to the terminal stored in the memory (41) is rewritten. Contents stored as information of PN = 1
Transfer the information to PN = 2 as it is. As a result, only the operation of connecting the telephone line can be used even after moving in the same state as before the change. Of course, the method of assigning the function of each key is the same. When a standard telephone other than the multi-function key telephone is connected to the exchange in this embodiment, the exchange sends out an identification number transmission request by knowing that the terminal is connected to a certain port by the inquiry as described above. Since there is no response, the exchange recognizes the above terminal as a terminal other than the multi-function key telephone. At this time, if the data corresponding to the terminal has already been set, the next port is inquired. If the data corresponding to the terminal has not been set, a data input request corresponding to the terminal (telephone) is sent to the maintenance terminal (45) and the input is awaited. Next, a case where a message is newly registered, deleted, changed, etc. on the exchange side will be described. This is executed by I / O processing as the processing of the exchange. First, key in "ORG" from the terminal (45).

Then, "CODE?" Is displayed by the I / O processing. On the other hand, hit "000 1 " from the terminal (45). This is the authorization code for entering a message.
Then, "MODE?" Is displayed by I / O processing. This is because the I / O processing requires that the input of the message is to be newly registered, changed, or deleted. On the other hand, from the terminal (45), "NE
Key in "W", "CHG", and "DEL". After key-in, inquiries such as “NUMBER?” And “MESSAGE?” Will be asked, so you can enter the identifier and message accordingly. When new registration, modification, and deletion of a message are completed in this way in the I / O processing, the fact is notified to the background job, and a message and an identifier (only the modified portion may be used) during the exchange processing. Is sent to the telephone terminal (11). Next, the message transfer when a telephone without a display, that is, a standard telephone is connected to the switching system in this embodiment will be described. Here, it is assumed that the message is converted into voice and transferred to the standard telephone. The overall configuration at this time is, as shown in FIG. 22, a voice synthesizing circuit (30
The feature is that 1) is provided. As shown in FIG. 23, this speech synthesis circuit (301) has a CPU (303).
And a ROM (305), a RAM (307), and an I / O (311). The CPU (303) performs processing according to the program stored in the ROM (305). In addition, in the ROM (305),
The word dictionary for voice synthesis, the parameter data for rule synthesis, and the correspondence between the above-mentioned identifiers and messages are also stored. Of course, this correspondence may be stored in the RAM (307). When storing in RAM, there are several possible ways to set the contents, as described above. When the exchange performs the message transfer, the state of the transfer destination terminal is obtained from the customer data as described above. As a result, if the transfer destination is a standard telephone, the CPU (37) of the exchange (13) sends an identifier (variable data may be added) to the voice synthesis circuit (301). This is done via the data highway (233). When the CPU (303) receives the identifier via the I / O (311) and the common bus (309), it starts the voice synthesis process.

For example, now "50300" is CPU as identifier + variable data
Suppose it was sent to (303). First, for this, "5"
The message corresponding to is read from the ROM 13057. Then, it is converted to the form of "Kaigichu 03:00 Made". This is subjected to voice synthesis as described below, and converted into PCM voice data at 8 KHz intervals. FIG. 24 shows a processing flow of voice synthesis. With respect to the message data as described above, the reading and accent are given for each word by referring to the word dictionary. In this example, the reading "Sanji" is given to "03:00". Next, accents and poses as bunsetsu are given, and conversion into spoken language is performed. Then, regular speech synthesis is performed based on the speech parameters, and 8K
You can get the PCM data “Kaigichu Sanjimade” at Hz intervals. This data is sent to the line card (15) via the PCM highway (17). This PCM data is converted into an analog voice signal in the line card and sent to the standard telephone (321) for message transfer.
At this time, a sound or a guide text indicating that the message is a registered message may be added before the message. Message delivery may also be restored until the handset is placed at the standard telephone (321). Although the embodiment of this description has been described above, the present invention is not limited to this embodiment. For example, the CPU memory or the like of the exchange may be fractionated into a line card, a trunk card or the like and the message may be stored in the memory of each card, and the transmission method and format between the exchange and the telephone terminal are also limited to the present invention. Not a thing.
Also in the telephone terminal, any display such as CRT, LED, LCD or the like may be used, and the key arrangement and the key operation are not limited to those in this embodiment. Even if a message is selected, the identifier may be directly selected by using a dial pad or the like, and the present invention is not limited to this method. It is obvious that the data terminal or tablet that can be connected to the telephone terminal may be omitted. Further, it is obvious that the message example and the control signal code are not limited to those in this embodiment.

Also, the setting of the identifier for the message is not limited to the embodiment. In the embodiment, the messages frequently used in the company are regarded as fixed messages, and these are identified by the identifier. What kind of message the identifier is assigned is determined by the system arbitrarily. Is. As the identifier, a number may be given as in the embodiment or a symbol may be used. Also, the address of the memory may be used as the identifier.

Also, the message does not necessarily have to be common to all telephone terminals, and the messages that can be used by the telephone terminals may be restricted.

[Brief description of drawings]

FIG. 1 is a diagram showing the features of the present invention, FIG. 2 is an overall configuration diagram of a system according to an embodiment, and FIG. 3 is a two-wire bidirectional burst transmission system (ping-pong used in this embodiment. Transmission method), FIG. 4 is a signal format in ping-pong transmission, FIG. 5 is a diagram showing that a control signal has a multi-frame structure, and FIG. 6 is an NRZ signal and DP.
FIG. 7 is a diagram showing a signal train, FIG. 7 is an external view of a telephone terminal with a display used in this embodiment, FIG. 8 is an electrical configuration diagram of the telephone with a display shown in FIG. 7, and FIG. Specific circuit diagram around hybrid circuit (139) in the figure, 1st
Figure 0 shows the line card (1
5) Specific configuration diagram of Fig. 11 and Fig. 11 are display examples on the telephone terminal with a display shown in Fig. 7 (display examples of soft keys).
Fig. 12 shows the customer data corresponding to the ports stored in the exchange, and the message showing the message during setting.
FIG. 13 is a state transition diagram, FIG. 14 is a diagram showing a data format when a message setting request is made, FIG. 15 is a diagram showing a data format when a message sending request is made, and FIG. 16 is a CPU (37) in the exchange. FIG. 17 is a diagram showing a flowchart for explaining the process of FIG. 17, FIG. 17 is a diagram showing a concrete processing procedure of the initial program in FIG. 16, and FIG. 18 is a query and response format at the time of creating the mounting map. Figure, No. 19
The figure shows an example of a specific input procedure when a message is input from the terminal (45) shown in FIG. 2, and FIG. 20 shows a signal used when initializing an identifier-message from the exchange side to the terminal side. FIG. 21 is a diagram showing a format, FIG. 21 is a diagram showing a flow of processing for checking the connection state of terminals performed during the exchange operation, etc. and automatically updating customer data,
FIG. 22 is an overall configuration diagram when standard telephones coexist as terminals, FIG. 23 is a specific configuration diagram of the voice synthesis circuit (301) in FIG. 22, and FIG. 24 is the voice of FIG. It is a figure which shows the process for obtaining PCM audio data from message data in a synthetic | combination circuit.

Claims (1)

[Claims] 1. A telephone exchange system for performing message communication, comprising a plurality of telephone terminals having in common a display means and a storage means for storing a correspondence between a fixed message and an identifier for identifying the fixed message. The calling telephone terminal has a specifying unit that specifies an identifier corresponding to the fixed message, an input unit that inputs a variable message, and a transmitting unit that transmits the identifier and the variable message. Receiving means for receiving the identifier and the variable message, and control means for reading the fixed message from the storage means based on the identifier and displaying the fixed message and the variable message as a series of messages on the display means. A telephone terminal message communication system characterized by having.