JP2559865B2 - Communications system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a telephone exchange device that accommodates a plurality of lines and terminals.

[Prior Art] Conventionally, a telephone exchange apparatus accommodating a plurality of lines and terminals displays the incoming call on the terminal when an incoming call is received from the line.

Further, conventionally, there has been a telephone exchange device that accommodates an ISDN (Integrated Services Digital Network) line as an external line. in this case,
Incoming calls from ISDN have various communication attributes.

Here, the communication attributes are, for example, communication speed, stop bit, data bit length, bit format such as parity bit type, distinction between synchronous / asynchronous, character type, flow control information, voice / G3 FAX / G4 FAX / document information. It refers to information such as media type, etc., and these pieces of information serve as a communication format agreement with a communication partner and, in some cases, a network carrying the information.

A data adapter is an adapter for a communication system such as a switching system that accommodates a data terminal device and transmits / receives data, and supports an automatic transmission / reception procedure such as V.25bis, X.21. There are some that do not support the communication procedure itself at all, just to match the data terminal device to the modem pool in the system which is connected to the data terminal device through the interface port. Further, a part that supports data communication as a part of the functions of a simple stand-alone terminal device may be referred to as a data adapter.

[Problems to be Solved by the Invention] In the above-described conventional example, the user of the communication system cannot judge the communication capability or communication attribute of the terminal from the display of the incoming call on the terminal, and the incoming call or the outgoing call is made. There is a drawback that a terminal that cannot support the communication attribute requested by the side answers the incoming call.

In addition, after answering an incoming call at a terminal that does not support the requested communication attributes, a wasteful operation is performed by searching for a terminal in the same communication system that has a communication attribute that can answer the incoming call, and transferring. However, there is a drawback that the call is disconnected because the call cannot be made.

Furthermore, from the integration of communication services such as ISDN and the compounding of terminals, it is necessary to handle calls with various communication attributes on the same line or channel, and to accommodate incoming calls with a wide variety of communication attributes. However, there is a drawback that the communication system becomes inconvenient and inconvenient for users.

[Means for Solving the Problems] The present invention has been made for the purpose of solving the above problems, and includes the following configuration as one means for solving the above problems.

That is, in a telephone exchange device accommodating a plurality of outside lines and extension terminals, receiving means for receiving communication attribute information of incoming calls from the plurality of outside lines, storage means for storing communication attribute information of the plurality of extension terminals, The extension terminal which confirms the matching between the communication attribute information received by the receiving means and the communication attribute information stored in the storage means, and the matching extension terminal displays an indication that the incoming external line is receiving a call The terminal includes control means for controlling the display of the plurality of extension terminals so as to display the incoming external line indicating that other terminals are communicating.

[Operation] In the above configuration, the function of notifying the user of the extension terminal whose communication attribute information does not match that of the incoming call that the incoming external line cannot be used by a simple display.

[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a communication system which is one of preferred embodiments according to the present invention.

In FIG. 1, 1 is a central processing unit (CPU) that controls each interface, terminal device and the entire system, 2 is a memory for storing control data and setting data, 3 is a call processing program and other various controls ROM (Read Only Memory) that stores programs. Also, 4
Is a switching unit constituted by a time division switch or the like, and 5 accommodates an ISDN line from an integrated digital service network (ISDN) 14 via a line terminating device (DSU) 15 and ISDN layers 1, 2, 3
ISDN that has a protocol processing unit and V.110 speed matching unit
Interfaces 6 to 8 are extension interfaces for accommodating a dedicated telephone set of the communication system.

Reference numeral 9 is a button telephone dedicated to a communication system which is connected to an extension interface and is constituted by a key pad, a speaker, a handset, a display section, etc. and handles only voice, 10 is a built-in telephone function in addition to the dedicated button telephone 9 of
A data adapter telephone that can be connected to a data terminal device (DTE2 12) such as a personal computer through the RS-232C interface, and the communication speed with the DTE2 and the communication format such as bit format can be changed by a command from the CPU1. is there. However, as will be described later with reference to FIG. 5, the communication speed is asynchronous from 300 bps to 9600 bps, the stop bit length is either 1,1.5 or 2 bits, and the data length is 5 to 8 bits.
The bit type and the parity type can be changed within the range of a combination of odd number, even number, or none. Further, 11 has a built-in RS-422 interface, and is a data terminal device (DTE1 13) such as a personal computer.
It is a data adapter telephone for synchronous communication with (communication speed 64Kbps).

FIG. 2 is a schematic view of a data adapter telephone used by connecting to the communication system of the present embodiment. FIG. 2 (a) shows the surface of the data adapter telephone, and FIG. 2 (b) shows an interface with the outside. Parts are shown respectively.

In FIG. 2 (a), 21 is the main body of the data adapter telephone, 22 is an LCD (liquid crystal element), etc., and is a display section for displaying character information and communication information, 23 is a handset for voice communication, And 24 is an LE for displaying the call status of the outside line
An outside line key having a D (light emitting diode) 24a. In addition, 25 is a data key for starting and ending communication, 26
Is a switching key for switching communication, 27 is a dial key pad, and 28 is a hold key.

The LED 24a corresponding to the outside line key 24 has the following lighting patterns depending on the call state.

Extinguishing light: Indicates that the corresponding outside line is empty (unused).

Fast blinking green: Indicates that the relevant outside line is receiving a call and is ready to answer.

Illuminated in green: Indicates that its own terminal device is in communication with the corresponding outside line.

Illuminated in red: Indicates that another terminal device is in communication with the corresponding outside line and its own terminal device cannot communicate with the call.

Slow blinking green: Indicates that the local terminal device holds the applicable outside line.

Slow flashing red: Indicates that the other terminal device holds the corresponding outside line and its own terminal device is ready for a hold response.

In FIG. 2 (b), 29 is a modular jack connected to the extension interfaces 6 to 8 through a modular code, and 30 is an RS-232C or RS-422 interface connected to a data terminal device through a dedicated cable. It is a data terminal port that has.

Note that the appearance of the button telephone 9 that handles voice exclusively is as follows:
The data terminal port 30 is deleted from the data adapter telephone shown in FIG.

FIG. 3 shows the configuration and setting example of the extension setting memory in the communication system of this embodiment.

FIG. 3 (a) shows the memory configuration of the extension setting memory,
The extension ID, extension number, terminal class, and additional information for the extension are, for example, in the case of a data adapter telephone, the communication format information such as the set communication speed.

3 (b) to (d) are setting examples of the extension setting memory, and FIG. 3 (b) shows the case of the key telephone 9 as an extension.
The ID is a, the extension number is 1234, and the voice-only class 1 is set as the terminal class. Further, FIG. 3 (c) is an example of the data adapter telephone 10, the extension ID is b, the extension number is 1235, the terminal class is class 2 capable of handling a data terminal device having voice and RS-232C interface, The communication format (attribute) is set such that the communication speed is asynchronous at 1200 bps, the stop bit is 1 bit, the data bit length is 7 bits, and even parity. FIG. 3 (d) shows an example of setting of the data adapter telephone 11, the extension ID is c, the extension number is 1236, and the terminal class is class 3 which enables connection with voice and a data terminal device having an RS-422 interface. , And the communication format (attribute) is a synchronous circuit switching terminal, which is set to communicate at a speed of 64 Kbps.

These setting data can be freely set by the user according to each terminal, or can be automatically set by the CPU 1 of the communication system. The extension number also corresponds to the ISDN subaddress.

FIG. 4 shows the configuration of the information holding memory and an example of the holding information in the communication system of this embodiment.

FIG. 4 (a) shows a memory configuration of the call information holding memory, which shows the state of the call, the extension ID of the own terminal, the extension type and its number,
Then, additional information (eg, communication format) for the call is held. Further, FIG. 4 (b) is an example of a hold call, in which the other party communicating through the ISDN line 1 is on hold by the extension whose extension terminal ID is b, and the line switching is asynchronous as a communication attribute. The call information shows that the communication speed is 9600 bps, the stop bit is 1 bit, the data bit length is 8 bits, and there is no parity.

FIG. 4 (c) is an example of a call during communication. The extension terminal ID is b, and communication is being performed with the other party through the ISDN line No. 2. Its communication attributes are asynchronous circuit switching, communication speed is 1200 bps,
It indicates that the stop bit is 1 bit, the data bit length is 7 bits, and the parity is an even number.

FIG. 5 shows through-communication attributes that can be accepted by the terminals (dedicated key telephone and data adapter telephone) of the communication system in this embodiment and the corresponding classes. Class 1 for dedicated button telephone 9, class 2 for data adapter telephone 10, and class 3 for data adapter telephone
Equivalent to 11 each.

FIG. 6 is a display example on the display unit of the dedicated button telephone and the data adapter telephone.

In Fig. 6 (a), the calling party number is 123-4567, 9600bps,
Data bit length 8 bits, no parity, stop bit 1 bit is an example of an incoming call display requesting asynchronous / circuit-switched data communication. FIG. 6 (b) shows 1200 bps, data bit length 7 bits, parity even, stop bit 1 bit. 2 is an example of display during communication by asynchronous / circuit switching. Also,
FIG. 6 (c) shows a case where the same telephone is handling two types of calls, and is an example of a display when one call is in communication and the other is held, and switching is in progress.

FIG. 6 (d) is a display example when the call in communication displayed in FIG. 6 (b) is put on hold, and FIG. 6 (e) automatically changes the communication attribute setting of the terminal. It is a display example at the time.

Next, the call processing procedure of the CPU 1 of the communication system in the present embodiment will be described with reference to the flow charts shown in FIGS. 7A, 7B, 7C and 7D. In the following description, the term "terminal" means both a dedicated button telephone and a data adapter telephone unless otherwise specified.

In step S1 of FIG. 7A, the ISDN interface 5 is IS
Based on the call setup message received from the DN network 14 via the DSU 15, it is determined whether there is an incoming call to the communication system of this embodiment. When an incoming call is detected, in step S2 the CPU 1 sets the incoming call information in the incoming call information holding memory, and the possibility of communication depending on whether the communication attribute of the incoming call is acceptable terminal Confirm. Specifically, it is confirmed whether the incoming call can match the terminal attribute classes 1 to 3 shown in FIG. For example, as the transfer capability information element (which may be a lower layer compatibility information element), the transfer capability is unrestricted digital, asynchronous 9600 bps, stop bit 1 bit, data bit length 8 bit, no parity, speed matching V.110 is called. Although it is allowed when the data communication is requested through the data adapter telephone 10 with the receiving sub-address of 1235 specified by the side, the communication of G4FAX is performed even though the data adapter telephone 10 is specified with the sub-address of 1235. If specified, the call will not be accepted.

If it is determined that communication is not possible because there is no terminal that can match the communication attributes with the incoming call as a result of confirmation of the communication possibility, the release completion message accompanied by the reason display and terminal attribute mismatch is displayed in step S3 in Fig. 7B. Thus, the incoming call is rejected, the call information holding memory is released, and the processing is terminated.

However, if it is determined in step S2 in FIG. 7A that there is a terminal that can accept the communication attribute of the incoming call, the process proceeds to step S4,
For acceptable terminals, set the LED of the incoming line to a lighting pattern (fast blinking green) that indicates that a call is being received.
For other unacceptable terminals, the lighting pattern (lighting in red) during communication with other terminals is set. Then, in step S5, the states of all the permissible terminals are searched, and the process branches according to the states.

For the processing for an empty terminal, see Fig. 7B step S6.
The ring tone is sounded with, and the response of the receiving terminal and the termination of the call due to the abandonment of the calling side are monitored in steps S7 and S8. And
If the receiving terminal (called terminal) responds before the incoming call stops, the process proceeds to step S9, a response message is sent to the ISDN network, and the communication path is connected in response to the incoming call to proceed to the next step. Stop the ring tone with S10a.

Next, in step S10b, the outside line LED of the responding terminal is set to green lighting indicating that the own terminal is communicating, and the outside line LED of the other terminal is set to red lighting indicating that the other terminal is communicating. Set. However, if the incoming call is stopped before answering, the ring tone is stopped in step S11, and the LED that was blinking or lit corresponding to the incoming call is turned off in the subsequent step S12, and the terminal, interface and call information are turned off. Release the holding memory and make it free, then exit.

On the other hand, if it is confirmed in step S5 in Fig. 7A that the terminal is communicating, a ringing tone is transmitted to the receiving terminal in step S13, and the information of the calling side (caller number, communication speed) is transmitted. , Bit format, etc.) are displayed (display example of FIG. 6 (a)). Then, switch key 26 with step S14
As a result of observing the pressing of the incoming call outside line key 24 while the LED is blinking and the key is not pressed, if the incoming call stop is recognized by observing the stop of the incoming call due to the abandonment of the calling side in step S15, In the next step S16, stop the ringing tone during communication of the terminal,
Clear the display. Then, in step S17, the outside line LED that has been lit in response to the incoming call is turned off, the call information holding memory is released, and the process ends.

In step S14, if the pressing of the incoming outside line key 24 while the LED is flashing is detected following the switching key 26, the process proceeds to step S18,
The call currently being communicated is put on hold, the call information is set in the call information holding memory, and the corresponding outside line LED is made to blink green in step S19 to show that its own terminal is on hold. Then, in step S20, the communication attributes (communication speed, stop bit number, data bit length, communication information such as parity information, etc.) requested by the calling side included in the incoming call setting message are set in the receiving terminal. Whether the communication attributes are matched is determined by comparing the call information holding memory and the extension setting memory.

If the results of the above comparison show that they match, step S21
Stop the ring tone during communication with and clear the display in step S22. Then, in a next step S23, a response message to the incoming call is sent to the ISDN network to complete the response to the incoming call, the communication path of the communication system is connected, and the call information holding memory is set to the communicating state.

However, if it is determined in step S20 that they do not match (for example, the setting of the data adapter telephone 10 is currently 1200 bps, 1 stop bit, 7 bit length, even parity as shown in FIG. 3 (c). When it is set, the incoming call is 9600bps, the stop bit is 1 bit, the data bit length is 8 bits, and no parity is specified.
The terminal is limited to the data adapter telephone) settings are automatically reconfigured according to the incoming call, and the extension setting memory is also automatically rewritten. Further, in step S25, the terminal sounds a tone to notify the user that the communication format has changed, and the changed communication format is displayed on the display section (see FIG. 6 (e)). And step S26
Sends a response message for an incoming call to the ISDN network, completes the response for the incoming call, and connects the communication path of the communication system. In step S27, the tone sounded in step S25 is stopped, the display is cleared, and the call information holding memory is set to the communicating state.

In FIG. 7C, in step S28, the external line LED corresponding to the communication of the terminal in communication is lit in green indicating that the terminal is in communication, and the corresponding LED of the other terminal is changed to the other LED. Set to light in red when the terminal is communicating. Then, in step S29, information (communication format) regarding the call in progress and the call on hold is displayed on the data adapter telephone in communication (see FIG. 6 (c)).

In steps S30 to S33, the switching key 26, disconnection of the held call, disconnection by the other party of the communicating call, and disconnection of the call at the own terminal side (on-hook for voice communication, data key for data communication, respectively) (The call is disconnected by pressing.)
To monitor. If the input of the switching key 26 is detected in step S30, the process proceeds to step S34 in Fig. 7D to hold the call during communication, set the information in the call information holding memory, and execute the step.
In S35, the LED of the corresponding outside line key is set to a state indicating that it is on hold, that is, a slow flashing of green.

In step S36 (see FIG. 7D), the communication attribute of the call information holding memory of the call for which a switching request is made, that is, the call that was held in step S30 (FIG. 7C) and the switching operation is performed. Check whether the communication attributes in the extension setting memory of the Natsuta data adapter telephone match. If the match is confirmed, in step S37, the hold call for which the switching request has been made is connected, the contents of the call information holding memory of the connected hold call are set to the communicating state, and the process returns to step S28 of FIG. 7C again. .

However, if it is determined in step S36 that they do not match, in step S38 the communication attributes of the terminal (data adapter telephone) that has performed the switching operation are matched with the communication attributes set in the call information holding memory. , The contents of the extension setting memory are rewritten, and at step S39, a tone for notifying that the communication attribute has changed is sounded, and a display showing the communication attribute is displayed (see FIG. 6 (e)). Then, in step S40, the held call for which the switching request is made is connected, the contents of the call information holding memory of the connected held call are set to the communicating state, and in step S41, the tone notifying that the communication attribute has changed is stopped. , The display is cleared and the process returns to S28.

When the disconnection by the other party of the hold call is detected in step S31 of FIG. 7C, the process proceeds to step S42 of FIG. 7D, the call information holding memory of the disconnected hold call is released, and the LED blinking as the hold call Turn off. And step S
At 43, the tone indicating that the held call is disconnected is sounded, at step S44 the display of the held call is cleared, and at the next step S45, the tone indicating that the held call is disconnected is stopped. The process ends.

Further, in FIG. 7C, if a disconnection by the communicating party is detected in step S32, the process proceeds to step S62, and a tone for notifying that the other party has disconnected is sounded, and step S6
At 3, the terminal is monitored for release due to disconnection (on-hook for voice communication, pressing data key 25 for data communication) on the terminal side. If the disconnection of its own terminal is detected in the step S63, the step S62 is executed in the step S64.
Stop the tone that was sounded at and clear the display of the call during communication. Then, in step S47, processing for releasing the call information holding memory for the disconnected call is performed. In step S33, when disconnection by the own terminal (on-hook in the case of voice communication, by inputting the data key 25 in the case of data communication) is detected, in step S46 the call information holding memory of the call being communicated is released or The disconnection release process for the outside line is performed, and the LED corresponding to the outside line of the disconnected call is turned off in step S47. Also, in step S48, the LED of the external key corresponding to the call that was on hold is left in the on-hold state (slow blinking green) of the held terminal, and other held calls can be accepted. At the same time, the other terminal is put on hold (slow blinking red) for an empty terminal, and at the same time, another terminal is in communication (red light) for an unacceptable terminal.

In step S49, a display indicating that there is a held call and information of the held call such as communication attributes are displayed, and in step S50, a tone is sounded to notify that there is a held call.
Then, in steps S51 and S52, a hold response (in the case of voice communication, pressing the outside line key of the hold call after off hook, in the case of data communication, pressing the data key 25 and the outside line key of the hold call).
And the disconnection of the hold call is monitored, and if the disconnection of the call held by the other party is detected in step S52, the tone is stopped and the display is cleared in step S60. Also, the following step S6
At 1, the LED for the disconnected call is turned off, the call information holding memory for the held call is released, and the process is terminated.

If a hold response is detected in step S51, step S53
Then, with the communication attribute of the call information holding memory of the call that was put on hold,
Check whether the communication attributes in the extension setting memory of the data adapter telephone that has performed the hold response operation match. If the match is confirmed in step S53, the held call for which a hold response is made is connected in step S54, and the LED of the corresponding external key is connected in step S59 to indicate that the data adapter telephone in communication is in the communicating state ( (Lit green), the other terminals are set to the state in which the other terminal is communicating (lit in red), and the call information holding memory of the connected hold call is set to the communicating state, and the process ends.

However, if it is determined in step S53 that they do not match, in step S55 the communication attribute of the data adapter telephone is set to match the communication attribute set in the call information holding memory, and the extension setting memory is also rewritten. In step S56, a tone is sounded to notify that the communication attribute has changed, and a display is made (see FIG. 6 (e)). Further, in step S57, the call information holding memory of the hold call is set to the communicating state, and the hold call for which the hold response request is made is connected, and in step S58, in order to notify that the communication attribute has changed in step S56. Stops the tone sounded at and clears the display.

As described above, according to the present embodiment, the LED display for the incoming call or the held call on the terminal connected to the communication system determines whether the incoming call answer or the held answer is possible or not at the terminal. As a result, the user is not confused about the response, and there is an effect that it is possible to avoid useless call transfer operation, erroneous response and erroneous disconnection of the call.

In addition, the call information stored in the communication system, the communication attributes of the terminal, and the like are displayed on the display unit of the terminal having the call that is in communication or on hold, so that the terminal simply matches the requested communication attribute. In addition to that, there is an effect that specific communication attributes can be visually confirmed.

The above-mentioned embodiment is not limited to the display pattern of the LED display corresponding to the outside line key as an indication of whether the terminal matches the communication attribute of the incoming call or not. You may make it distinguishable by the some sound corresponding to an attribute.

In addition, information elements (transmission capability, low-layer compatibility, high-layer compatibility, etc.) included in the ISDN message were used to recognize the communication attributes of the incoming call, but the communication attributes were uniquely registered for each outside line trunk. The method of doing may be adopted.

Further, in the above embodiment, the communication attribute of the data adapter telephone is set to match the incoming call only when the incoming call and the setting communication attribute do not match. If it is determined that the communication attributes of the incoming call are within the change allowable range of the incoming data adapter telephone without making a judgment as to whether or not the setting is made, unconditionally set to match the communication attributes of the incoming call. Good.

[Effects of the Invention] As described above, according to the present invention, an extension terminal that does not match the communication attribute information of an incoming call is displayed on the extension terminal so as to display that the incoming external line is communicating with another terminal. By controlling the display, there is an effect that the user of the extension terminal can be notified by simple display that the incoming external line cannot be used.

[Brief description of drawings]

FIG. 1 is a block diagram of a communication system according to an embodiment of the present invention, FIG. 2 (a) is a schematic plan view of a data adapter telephone housed in the communication system according to the embodiment, and FIG. 2 (b) is FIG. 3 (a) is a diagram showing the memory configuration of the extension setting memory of the communication system according to the embodiment, and FIG. 3 (b) is a diagram showing the extension setting memory for the key telephone 6. FIG. 3 (c) is a diagram showing an example of setting the extension setting memory for the data adapter telephone 10, and FIG. 3 (d) is a diagram showing an example of setting the extension setting memory for the data adapter telephone 11. FIG. 4 (a) is a diagram showing a memory configuration of a call information holding memory of the communication system according to the embodiment, FIG. 4 (b) is a diagram showing an example of a held call in the call information holding memory, and FIG. ) Is the communication of the call information holding memory FIG. 5 is a diagram showing an example of an incoming call, FIG. 5 is a diagram showing correspondence between communication attributes and classes of terminals accommodated in the communication system according to the embodiment, and FIG. 6 (a) is a communication system according to the embodiment. The figure which shows the example of the incoming call display on the display part of the accommodated terminal, FIG.6 (b) is the figure which shows the example of display during communication, FIG.6 (c) is the figure which shows the example of display during switching communication, FIG. 6 (d) is a diagram showing an example of the pending display, FIG. 6 (e) is a diagram showing an example of the communication attribute setting change display, and FIGS. 7A to 7D are CPUs of the communication system according to the embodiment. 3 is a flow chart showing the call processing procedure of FIG. In the figure, 1 ... CPU, 2 ... memory, 3 ... ROM, 4 ... exchange section, 5 ... ISDN interface, 6-8 ... extension interface, 9 ... button telephone, 10,11 ... … Data adapter telephone, 12,13 …… Data terminal device, 14 …… ISDN
Net, 15 …… DSU, 21 …… Data adapter Telephone body, 22
...... Display, 23 ...... Handset, 24 ...... Outline key, 24
a …… Call status display LED, 25 …… Data key, 26 …… Switch key, 27 …… Dial key pad, 28 …… Hold key, 29
…… Mojiyurayatsuk, 30 …… It is a data terminal port.

Claims (1)

(57) [Claims] 1. A telephone exchange apparatus accommodating a plurality of extension lines and extension terminals, receiving means for receiving communication attribute information of an incoming call from the plurality of extension lines, and storage for storing communication attribute information of the plurality of extension terminals. Means, confirming the matching of the communication attribute information received by the receiving means and the communication attribute information stored in the storage means, the matching extension terminal performs a display indicating that the incoming external line is receiving a call, The telephone exchange device, wherein the extension terminal that does not match is provided with control means for controlling the display of the plurality of extension terminals so as to display that the incoming call is being communicated with another terminal.