JP2537173B2 - Telephone exchange system - Google Patents

Description

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

[Technical background of the invention and its problems]

Telephone, facsimile, etc. are communication media that support the information-oriented society. While these techniques are very good, they also have drawbacks. For example, although the telephone is the most widely used and convenient device, it can transmit only voice, and the system side has a limited service. This was the same for fax machines. There is voice mail as a new telephone service. Although this voice mail is excellent in that the caller can transmit information regardless of the state of the called party, it uses the voice medium used by the telephone and only shows different uses of the telephone. No, it was not enough as a service.

[Object of the Invention]

It is an object of the present invention to eliminate the above drawbacks and provide a telephone exchange system capable of using media other than voice by the most widely used telephones.

[Outline of Invention]

This invention is a telephone terminal (1) having a display means (2).
And message communication in an exchange system including a telephone terminal (3) having no display means.

That is, the telephone exchange system of the present invention comprises a telephone terminal having a display means, a telephone terminal having no display means, and an exchange for performing at least one of voice communication and message communication between the telephone terminals. Has storage means for storing a message and terminal type information indicating whether or not there is a display means for each telephone terminal. When a call is made to the telephone terminal in which the message is stored, the calling telephone based on the terminal type information. The display means of the calling telephone terminal is provided with a judging means for judging whether or not the terminal has a displaying means, and a converting means for converting the message into a voice signal, and when the calling telephone terminal has the displaying means. The message is displayed, and when the calling telephone terminal has no display means, the converting means converts the message into a voice signal and sends it to the calling telephone terminal.

〔The invention's effect〕

According to the present invention, when a call is made to a telephone terminal in which a message is stored, the presence / absence of the display means of the calling telephone terminal is determined by the judgment means of the exchange based on the terminal type information indicating the presence / absence of the display means for each telephone terminal. If the calling telephone terminal has a display means, the message is displayed on this display means. If the calling telephone terminal does not have the display means, the message is converted into a voice signal by the conversion means of the exchange. And sends it to the calling telephone terminal.

Therefore, according to the present invention, the user can accurately convey the message to the user of the calling telephone terminal without knowing whether the calling telephone terminal has the display means.

Further, since the conversion means is provided in the central exchange so that the telephone terminals can commonly use it, it is not necessary to provide the means for each telephone terminal.

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) This is the case of calling.
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), the tone circuit (23) and the conference circuit (25) are connected to the PCM highways (27), (29), (31). Connected through. A voice signal or data signal is carried on the PCM highway.

The time switch circuit (19) has a PCM highway (1
The time slot for the signals on 7), (27), (29) and (31) is 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. The various tones are supplied as digital signals from this circuit (23). The conference circuit (25) is for performing calculations when making a call for three or more parties. The line card (15), the time switch circuit (19), the transaction card (21), the tone circuit (23), and the conference circuit (25) have a clock generator (26).
Is supplied with a reference clock from which the operation is defined. 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), and the common bus (35) has a CPU (37), a floppy disk (FD) (39), a memory (41), and an input / output. Circuit (4
3) is hanging. The floppy disk (39) stores the exchange control operation program and various data.

Floppy disk (39) is stored in memory (41)
Loaded into the CPU (3) according to the contents stored in the memory (41).
7) works. The floppy disk (39) is used as a backup for the memory (41).

A data terminal (45) is connected to the input / output circuit (43). The data terminal (45) is used for inputting custom data, which will be described later, and for maintenance management. The custom data is attribute information such as the type of telephone terminal, telephone number, and key function assignment in a multifunction telephone. Also, 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 between the telephone terminal (11) and the exchange (line card (15)) like ping-pong. As shown in FIG. 3, a signal of a predetermined format is transmitted from the li 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 is 125
Perform within μsec.

Next, the signal format in this transmission method will be described. As shown in FIG. 4, 12 pits form one frame. The first 1 bit is assigned to the frame sync bit (F) and the next 8 bits (V) to the audio signal. Subsequently, 1 bit (D) is assigned to the data and 1 bit (C) is assigned to the control signal, and the last 1 bit is for the validity (P). If you look only at the audio signal, 8 every 125 μsec
Bits will be transmitted, realizing 64kbps PCM real-time transmission.

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. The control signal bit (C) is usually a signal for controlling the telephone terminal (11), and 12 bits form one unit. 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 multi-frame 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, as the transmission method between the telephone terminal (11) and the line card (15), two-wire bidirectional burst transmission (ping-pong transmission) is adopted, but each signal is diphase-coded on the transmission path. Have been made. 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 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 (63) 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) have fixed functions, for example, functions such as auto dial, which are assigned according to the state of the terminal. is not.

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 a 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 the drawing phone tab trout input device (1
An example including 13) will be described. This terminal (11)
Ping-pong transmission system (115), voice system (117), operation system (11
9) 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 operator and the processing system (121). A processing system (121) performs certain processing on the data and controls the operation of the entire terminal (11).

The voice system (117) includes a handset (105) and a speaker (10).
Including 3). This audio system (117) is a C 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 the PU (125) and 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 / decoder with both functions of an encoder (coder) and a decoder (decoder). This codec &
The CPU (125) controls the filter (127) via the common bus (123) and the voice 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). The number of bits is 8 bits, 1 bit, and 1 bit, respectively.

Data in the audio signal (V) area of the reception frame register (143) is codec & filter (127).
Will be input. Similarly, the data in the data area (D) is
It is sent to the data terminal (111) via the I / O (RS232C) (145). The data in the control signal (C) area is sent to the 12-bit shift register (SR) (147). The transmission frame register (133) has the same structure, and has an 8-bit audio signal (V) area, a 1-bit data (D) area,
It consists of a 1-bit control signal (C) area. The output of the above codec & filter (127) is input to the audio signal (V) area of the transmission frame register (133). 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. Codecs & Filters (127)
The 8-bit PCM audio signal from is temporarily stored in the audio signal (V) area in the transmission frame register (133).
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 . The data from the data terminal (111) is stored in the data (D) area via the I / O (145). The data transmission from the I / O (145) is also controlled by the timing signal T ₁ .

When 10-bit data is prepared in this way, 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 is output with a duty ratio of 100%. This has the same format as an NRZ (Non-Returu-To Zevo) signal. This signal train is the NRZ / DP conversion circuit (13
In 7), diphase coding is performed. Then, it is sent to the telephone line (109) via the hybrid circuit (139).

At the time of reception, the signal which 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. continue
The 10th bit is stored in the data (D) area, and the 11th bit 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. Data in the data area is sent to the data terminal (11) via the I / O (145).
Sent to 1). 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) for driving and controlling 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) It 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 terminal (111) on the day
Data is exchanged via / O (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 (1
39) and the specific structure of the DP / NRZ conversion circuit (141) will be described with reference to FIG. These circuits (137), (13
9) and (141) are electrically connected to the telephone line (109) through the hybrid coil (161). And NRZ / DP
Transmitter (163) centered on the conversion circuit (137) and DP / NRZ
And a receiving section (165) centered on a conversion circuit (141).

With such a configuration, the signal from the telephone line (109) is obtained as digital data, the digital data is subjected to diphase coding, and the digital data is sent 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 sync bit is detected from the signal received by the frame detection circuit (167), and 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 8 KHz, timing signal T ₂
Is 64 KHz, the timing signal T ₃ is 256 KHz, and the timing signal T ₄ is 2 MHz. Further, as described above, data is written to the transmission frame register (133) from the codec & filter (127), the I / O (145) and the 12-bit shift register (149), and the parity addition circuit (135). Since the data is read out, it is natural that the phases need to be shifted for this writing and reading. 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) includes a hybrid circuit (201), a transmission / reception circuit (203), and a reception frame register (205).

The hybrid circuit (201) and the transmitting / receiving circuit (203) have the same configuration as the specific configuration shown in FIG. That is, the signal of the telephone line (109) is decoded and converted into an NRZ signal,
On the contrary, 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 detection of the frame synchronization bit (F) in the synchronization signal detection circuit (204), and the NRZ signal is detected based on this signal.
The signal is loaded into the receive frame register (205).
At this time (starting from the frame sync bit (F))
The second to ninth bits of data 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). A multiplexer (213) is connected to the registers (207) and (209).
A counter (215) and a comparator (217).

The registers (207) and (209) send the stored data to the multiplexer (213) based on the clock signal. This clock signal is generated by the clock generator (2
6) is supplied via the clock signal line (219).
This clock signal is also supplied to the counter (215) and counted by the counter (215). The counter (215)
Initialized by the PCM frame sync signal.

This PCM frame synchronization signal is sent from the I / O (33) via the frame signal line (221). Although not shown in FIG. 2, it can be considered that they are provided together as a PCM highway (17) or the like. Therefore, the counter (215) is
The clock signals are counted from the beginning of the frame, and the comparator (217) detects the coincidence with the predetermined value. This predetermined value is a unique address determined for each line card, and is 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), if the unique address and the count clock signal number match with each other in the comparator (217) in this way, the result of the multiplexer ( 213) and the demultiplexer (223) described later. Upon receiving this, the multiplexer (213) multiplexes the contents of the registers (207) and (209) and sends it to the PCM highway (17). This PCM highway (17) is connected to the time switch circuit (19) as described above.

On the other hand, the control signal stored in the control signal area of the reception frame register (205) is accumulated in the 12-bit shift register (211). If 12 bits have been accumulated, the CPU (227) will be processed as one control signal via the bus (225).
Sent to The CPU (227) decodes the contents of 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, the transmission from the exchange side to the telephone terminal (11) will be described. P sent via PCM highway (17)
CM voice data is time-division multiplexed. This data is sent to the line card (1
5) It is taken in. As described above, a unique address is assigned to each line card (15), and this also serves as the time slot number 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 the 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 necessary for exchange control, and
It is distinguished from the data transmitted via the PCM highway (17). The data sent via the data highway (23) is sent to the CPU (227) via the I / O (231),
Further, it is 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, which are the same as the reception frame register (205) or the reception frame register (133) in the telephone terminal (11). 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 di-phase encoding and sent to the telephone line (109) via the hybrid circuit (201).

Next, message communication will be described. In this embodiment, the message is divided 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-mentioned 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.

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

Since the ROM is a read-only memory, it is necessary to store the above correspondence and prepare it for each terminal (11). In this case, it is not always necessary for the exchange side to have this correspondence in advance, but here it is the ROM at the terminal (11).
The same storage contents as the above are 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. The message setting request mode and the message sending request mode. In the message setting request mode, when the operator of the telephone terminal (11) is absent and cannot respond to the telephone (11) after that, a preliminary message is set and the other terminal (11) is set.
The above message is transferred to this caller when the call is made from the caller. The message sending mode is for sending a message to a called party when the called party does not respond when calling to another terminal (11).

First, the message setting request mode will be described.
To perform this mode, first press the key (6
5) Operate. This key (65) is for message setting /
It is a selection key. When this key (65) is first pressed, the CPU (125) of the telephone terminal detects this operation state and enters the message setting mode. In this mode, the CPU (125)
The contents of identifier "1" are called from the identifier table, and LCD (5
Display in 1). Here, "Geishtsu, waistcoat" corresponding to the identifier "1" is displayed. Since this is not the message that is needed now, the operator presses the message setting / selection key (65). 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 the confirmation key, ▲ [#] ▼ in the dial pad (102) may be used, or the function keys (67) to (79), (9
You may select one from 5) to (101) and set it. Also, the 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 a dial pad (102) "0""3""0"
Press "0". The CPU (125) is this "0""3""0"
"0" is displayed as 03:00 in the underlined area in the message displayed on the LCD (51). Then, "KAIGI CHU 03:00 Made" is displayed. At this time, CPU
(125) stores the identifier "5" and the variable message "0300" as "50300" in the RAM (156). At the same time, this "50 300" is sent as data to the exchange.

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 method is adopted in this embodiment,
The control signal bits in the format shown in the figure will be used. Also, the data itself used here is 12 bits and is a unit.

First, the CPU (125) sends a message setting request to the exchange. An example of this setting request is shown in FIG. Here, 12 bits are one unit, but C ₀ is a frame synchronization bit,
C ₁ and C ₂ are bits indicating the meaning of the 12-bit data, C _{3 to} C ₁₀ are data to be transmitted, and C ₁₁ is a parity check bit (even number in this example). Such 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 line card (15) receives the above data and sends it to the CPU (37). After receiving and recognizing the message setting request, the CPU (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 indicates, 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. Customer data includes telephone terminal (11) type status, telephone number,
Attributes such as key function allocation. The type of terminal (11) is an ordinary dial telephone, touch-tone telephone, telephone with display, telephone with data terminal (for example, computer telephone).
Etc. The state of the telephone terminal (11) is the concept of the level 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. This embodiment is characterized in that the state "7" is set to the state "message set".

For customer data corresponding to such ports Memorize the message during setting. 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".
Is.

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 CPU (37) recognizes that the terminal "1" is in the status "7" and 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 terminal (11) when setting the message.
From the exchange to the exchange, the CP in the exchange is the same.
The U (37) sends the control data to the calling terminal through the line card (15) and the like 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 the CPU (125) of the terminal that received the message transfer recognizes the control data,
The contents of the identifier table are retrieved from the memory (157) using the identifier. Here, "Kaiguichu ^: " corresponding to "5"
"Made" will be called. However, when the identifier table is stored, the character corresponding to “Kaigichu ^: 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)
Assigns camp-on, automatic call back, recall, message transfer, and barge functions to keys (53) to (63). At the same time, CPO (camp on), ACB (automatic call back), RCL (recall), LMG (message transfer), and OOR are displayed on the parts corresponding to the keys (53) to (63) in the LCD (51).
(Interrupt) is displayed.

The operator then presses the key (59). This softkey (59) 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). Then, similarly to the message setting request mode, the identifier table is called and the contents of the identifier “1” are displayed. Then, the fixed part of the message is determined by the operation of the key (65) and ▲ [#] ▼ of the dial pad (102). 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 busy (or in any state), and since the identifier is used, the transfer amount can be greatly reduced.

In the above-described embodiment, the example in which the identifier table is stored in the ROM has been described, but naturally the RAM (Randon Access Memory)
Can be stored in. Moreover, in this case, there is an effect which will be apparent from the following description.

In the following explanation, the identifier-message correspondence of the data terminal (45) is input to the floppy disk (39) in the exchange, and at the same time, the identifier-message correspondence is initially stored in each telephone terminal (11). 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. The data terminal (45) is a maintenance terminal, and inputs an authorization code when writing a message from this terminal (45). For example, when the authorization code is "0003", the following process is diagnostic, when it is "0002", it is the 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 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 exchange 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, the initial program described later will start,
After the processing by this program is completed, the supervisor executes I / O processing, exchange processing, background processing, failure processing, etc. in accordance with the priority order.

Next, the initial program will be described. As shown in FIG. 17, this program starts with a process of initializing the entire hardware, particularly 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 loading the exchange program and the necessary data. What is a data area?
This is a storage area for data regarding 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, the CPU (37) sends an inquiry signal to the line card (15) and the trunk card (21) using the control signal line (data highway). On the other hand, the 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 for discarding the lower 2 bits is that this unique address is originally set for the telephone terminal (11) (port), and in this embodiment, 4 is set for one line card (15). Since the individual 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 (11) is identified by including the lower 2 bits. Naturally, if the number of terminals (11) connected to the line card (15) changes, the expression of the unique address also changes, so the expression of the unique number here also changes. CP such a response
The U (37) confirms the mounting of the line card (15) and the like. 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 it receives the inquiry signal, it sends its own unique number as a reply to the exchange. (This will be described later.) The CPU (37) receives this response and receives the response from the terminal (1
Make a map of 1) mounting status. 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)
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 message storage request command consisting of 12 bits. This is the CP in the line card (15)
It is received by U (227) and stored once in the register (239). After this, using the control signal bit in the ping-pong transmission format, the terminal (1
Sent to 1). The terminal (11) receives the receive frame register (1
43), 12-bit shift register (147), etc.
Sent to (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. CPU of terminal (11) (125)
Stores the identifier and the message in the RAM (158). When the message storage end command is received, this process is ended.

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. This means automatic modification of customer data if prompted by port support. New terminals especially for changing customer data (11)
Is caused by the connection 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. 21st
The operation of the exchange at the time of inquiry is shown in the figure by a flowchart.

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 three ports on the same port.
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 out the inquiry to the same port three times in succession, and if there is no response to all, it recognizes that the terminal connected to the port has been removed.

A case where a multifunction button telephone is newly connected to the exchange will be described. As an example, it is assumed that a 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, the multifunction button telephone (11) uses the terminal identification code (unique for each model) fixedly stored in the read-only memory (126) under the control of the CPU (125) as a control signal, Common bus (123), shift register (149), control signal area (C) of transmission frame register (133), parity addition circuit (135), NRZ / DP conversion circuit (137), hybrid circuit (139), telephone line It is sent to the exchange side via (109). On the exchange side, when this line identification code is received by the line card (15), the CPU in the line card (15)
(227) transmits the terminal identification code and the port number (PN) that received it to the CPU (37) of the processing system via the data highway (233) and I / O (33). CPU (3
7) 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, an identification number for identifying the terminal (position of terminal A) to the multifunction button telephone (position of terminal A) via the I / O (33), data highway (233), line card (15), and telephone line (109) as a control signal. Different for each terminal). On the multi-function button telephone side, the above identification number is transferred to the telephone terminal CP via the hybrid (139), DP / NRZ conversion circuit (141), reception frame register (143), shift register (147) and common bus (123).
When the U (125) receives it, the CPU (125) stores the above identification number in a rewritable memory (126) (which may be composed of an E ² PROM). 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, assume a case where the multifunction button telephone connected to the telephone line (109A) is reconnected to the telephone line (109B) (moving from the location of the terminal A to the location of the terminal B). Telephone lines (109A) and (109B)
It is assumed that they are connected to the port 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 phone is connected to the line (109B),
The exchange recognizes that the telephone is connected to the port of PN = 2. The exchange sends an identification number transmission request to the port of PN = 2. On the other hand, the CPU in the telephone (125)
Sends the identification number stored in the RAM (126) to the exchange as control data.

On the exchange side, the above identification number is used for the line card (15),
Through the data highway (233) and I / O (33), the CPU (3
7) to receive. 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. The contents stored as the information of PN = 1 are directly transferred to the information of PN = 2. As a result, only by the operation of connecting the telephone, it becomes possible to use it in the same state as before the change even after the movement. 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 terminal as a terminal other than the multifunction key telephone. At this time, if the data corresponding to the terminal has already been set, the next port is inquired. if,
If the data corresponding to the terminal is not set, a data input request corresponding to the terminal (telephone) is sent to the maintenance terminal (45) and the input terminal waits.

Next, a case where a message is newly registered, deleted, changed, or the like on the exchange side will be described. This is executed by I / O processing as the processing of the exchange. First, from the terminal (45) "OR
Key in "G". Then, I / O processing causes "CODE?"
Is displayed. On the other hand, "0001" is typed 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 to specify whether the input of the message is new registration, change, or deletion. On the other hand, "NEW", "CHG", and "DEL" may be keyed in from the terminal (45), respectively.
After key-in, inquiries such as "NUMBER?" And "MESSAGE?" Will be sent. You can enter the identifier and message accordingly.

In this way, when new registration, modification, deletion, etc. of a message are completed in the I / O processing, the fact is notified to the background job, and a message and an identifier (only the modified part may be used) during the exchange processing. Is a telephone terminal (1
Sent to 1).

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 characterized in that a voice synthesizing circuit (301) is provided on the exchange (13) side, as shown in FIG.

As shown in FIG. 23, the voice synthesis circuit (301) includes a CPU (303), a ROM (305), a RAM (307), and an I / O (3).
11) and are provided. The CPU (303) performs processing according to the program stored in the ROM (305). In addition, ROM (3
05) also stores a word dictionary for voice synthesis and correspondence between the above-mentioned identifiers and messages as parameter data for rule synthesis. 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 transfers the message, 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 (3
7) sends the identifier (variable data may be added in some cases) 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), the speech synthesis process is started. For example, assume that “50300” is sent to the CPU (303) as the identifier + variable data. First, the message corresponding to "5" is read from the ROM (305). Then, it is converted into the form of "Kaigichu 03:00 Made". As described below, this is subjected to voice synthesis 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, "0
The reading "Sanji" is given to "3:00". Next, accents and poses as bunsetsu are given and conversion into spoken language is performed. Next, regular voice synthesis is performed based on the voice parameters, and PCM data “Kaiguichu Sanjimade” at 8 KHz intervals is obtained. This data is PCM
It is sent to the line card (15) via the 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.

Also, message transmission may be repeated until the handset is placed on the standard telephone (321).

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment.

For example, the CPU memory and the like of the exchange may be divided into line cards and trunk cards, and the message may be stored in the memory of each card. The transmission system and format between the exchange and the telephone terminal are also limited to the present invention. is not. 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 the message is selected, the identifier may be directly selected by using the dial 1 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.
It is also clear that the message example control signal code is not limited to 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 arbitrarily determined in the system. . 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 process of the CPU (37) in the exchange. 17 is a diagram showing a flowchart for explaining the above, FIG. 17 is a diagram showing a concrete processing procedure of the initial program in FIG. 16, FIG. 18 is a diagram showing a format of an inquiry and a response at the time of creating the mounting map, FIG. The figure is
The figure which shows the example of concrete input procedure when inputting the message from the terminal (45) which shows in Figure 2, Figure 20 shows the format of the signal which is used when initializing the identifier 1 message from the exchange side to the terminal side Figures 21 and 21 show the flow of processing for checking the connection status of terminals and automatically updating customer data during the exchange operation, and Figure 22 shows the case where standard telephones are mixed as terminals. Overall configuration diagram of No.
FIG. 23 is a specific configuration diagram of the voice synthesis circuit (301) in FIG. 22, and FIG. 24 is a diagram showing a process for obtaining PCM voice data from message data in the voice synthesis circuit of FIG. is there.

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Claims (1)

(57) [Claims] 1. A telephone exchange system comprising a telephone terminal having a display means, a telephone terminal not having the display means, and an exchange for performing at least one of voice communication and message communication between the telephone terminals. Has storage means for storing a message and terminal type information indicating whether or not there is a display means for each telephone terminal. When a call is made to the telephone terminal in which the message is stored, a call is issued based on the terminal type information. The calling telephone terminal is provided with a judging means for judging whether or not the calling telephone terminal has a display means, and a converting means for converting the message into a voice signal. When the calling telephone terminal has a display means, the calling telephone terminal is provided. The display means displays the message, and when the calling telephone terminal has no display means, the conversion means converts the message into a voice signal. Telephone switching system, characterized by sending the Kihatsuko telephone terminal.