JP4247455B2 - Line avoidance device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a line avoidance device that can effectively avoid a telephone line when a private branch exchange having a CTI (Computer Telephony Integration) function fails.
[0002]
[Prior art]
An automatic switching system that integrates a telephone system such as PBX and an information processing system such as PC LAN or FAX is rapidly spreading as a private branch exchange having a CTI function.
[0003]
Private branch exchanges having a CTI function have improved compatibility with information processing systems such as personal computers that handle the same digital signals as the telephone network has been digitized. Can be integrated to complement each other's functions to improve operational efficiency and sophistication.
[0004]
[Problems to be solved by the invention]
According to such a prior art, the private branch exchange having the CTI function loses all incoming call functions from the outside when the personal computer included in the information processing system runs out of control or the system goes down. There was a problem that the system was often lost to function.
[0005]
Accordingly, in view of the problems of the prior art, an object of the present invention is to provide a line switching matrix and a microcomputer so that a telephone line can be effectively avoided when a private branch exchange having a CTI function fails. It is an object of the present invention to provide a line avoidance device that can maintain the function of the system normally.
[0006]
[Means for Solving the Problems]
The configuration of the invention according to claim 1 to achieve the above object is a line for an external line accommodation type private branch exchange having a CTI function and accommodating an external line accommodation board for a plurality of external line telephone lines having a representative number system. An avoidance device comprising a line switching matrix to be inserted on the office line side of the private branch exchange, and a microcomputer for avoiding a faulty line of the private branch exchange through the line switching matrix, on the office line side of the line switching matrix Each line has a detection unit that outputs the ringing signal from the office line side, the busy state of each line to the microcomputer as an incoming signal, and a busy signal, and the microcomputer sets the incoming signal from the detection unit. When a private branch exchange line failure is detected by exceeding the number of calls, the busy signal is not generated from the detector. As its gist to select lower priority without normal line as the line for avoidance.
[0007]
According to a second aspect of the present invention, there is provided a line avoidance device for a private branch exchange having an external line accommodation board and an external line accommodation board having a CTI function, wherein the extension line accommodating board and the internal line accommodation board are provided. A line switching matrix that is commonly inserted into both terminals and a microcomputer that avoids a troubled line of the private branch exchange via the line switching matrix are provided. Each line is provided with a detector that outputs to the microcomputer as a ringing signal and a busy state of each line as an incoming signal and a busy signal, and the line accommodation matrix side of the line switching matrix indicates the busy state of each line. Each line has a detection unit that outputs a busy signal to the microcomputer. The microcomputer detects the number of calls set by the incoming signal from the detection unit on the local line side. When a line failure of the private branch exchange is detected, the extension terminal line that is not busy is selected as an avoidance line based on the fact that the busy signal from the detection unit on the extension accommodating board side is not generated. This is the gist.
[0008]
In addition, a busy setting unit is provided for each line on the extension accommodation board side of the line switching matrix, and the microcomputer connects the private branch exchange side of the extension terminal line selected as the avoidance line via the busy setting unit. You can be busy continuously.
[0009]
According to a fourth aspect of the present invention, there is provided a line avoidance device for a private branch exchange having a CTI function and accommodating a main line accommodating board and a sub line accommodating board, and accommodating a main line accommodating board and a sub line accommodating board. A line switching matrix to be inserted into the extension terminal side and a microcomputer for avoiding a faulty line of the private branch exchange via the line switching matrix. The station line side and the extension terminal side of the line switching matrix Each line is provided with a detection unit that outputs a ringing signal from the line side, a busy state of each line as an incoming signal, and a busy signal as a busy signal. If a failure of one line in the main line accommodation board of the private branch exchange is detected due to the occurrence of exceeding, the line in the sub line accommodation board is used for avoidance As its gist that collectively selected as a line.
[0010]
A patch panel using a patch cord is interposed between the line on the office line side of the line switching matrix and the line on the extension terminal side. When the system of the private branch exchange is down, the microcomputer The extension terminal line can be selected as an evasion line via.
[0011]
[Action]
According to the configuration of the invention, the microcomputer avoids a faulty line of the private branch exchange having the CTI function through the line switching matrix. In other words, when the microcomputer detects that a specific line of the private branch exchange has failed, it automatically switches the private branch exchange side of the line to another line via the line switching matrix, and receives an incoming call from the outside. The function can be maintained. Note that a failure of a specific line can be easily detected by detecting that the number of calls of an external call signal is excessive. This is because a private branch exchange with a CTI function generally has an automatic incoming call function that automatically answers within a set number of calls.
[0012]
The microcomputer can effectively use a lower line with a low calling frequency by selecting a normal line that is not busy as a lower line as the avoidance line. However, this method is applied to an external line accommodation type private branch exchange that accommodates an external line accommodation board for a plurality of external line telephone lines having a representative number system. Therefore, when the private branch exchange accommodates a plurality of external line accommodating boards, the lower line is generally accommodated in an external line accommodating board physically different from the failed line. Even it can deal effectively.
[0013]
If a failure is detected in the lower line selected as the avoidance line, the microcomputer reselects the next normal line that is not busy. However, the number of such reselections is limited to a preset upper limit number. Also, when another failed line is detected after avoiding the first failed line, the next normal line not busy is selected as the avoiding line. However, the number of lines to be avoided in this way is also limited within the preset maximum number of lines.
[0014]
If the normal line selected as an evasion line is busy, the line is used as an evasion line, and it is easy from the outside that incoming calls cannot be received. Can be confirmed. However, the line selected as a line for avoidance is distinguished from the normal long-duty busy by making the local line side busy for a short time of about 0.5 seconds when a ringing signal for the same line is detected. Shall be allowed to. This is because the local line side of the line is not allowed to keep this busy continuously other than normal busy.
[0015]
By setting up a dedicated terminal line for avoidance, the microcomputer can completely bypass the private branch exchange, and can secure a minimum incoming function of a telephone from the outside by the dedicated terminal. In this case, only one dedicated terminal is generally required, but two or more dedicated terminal lines may be provided to provide two or more dedicated terminals. Further, when a plurality of private branch exchanges are arranged in parallel, only one dedicated terminal may be provided in common to all private branch exchanges.
[0016]
The microcomputer can effectively utilize the extension terminal by selecting an extension terminal line that is not busy as the avoidance line. Note that this method is applied to an external extension type private branch exchange having both an external line accommodation board and an internal line accommodation board. At this time, the line switching matrix is applied to both the local exchange side and the extension terminal side of the private branch exchange. Shall be inserted in common.
[0017]
If the private branch exchange side of the extension terminal line selected as the avoidance line is busy, it can be easily confirmed from other extension terminals that the extension terminal line is being used as the avoidance line. . However, the extension terminal line selected as the avoidance line may be continuously busy on the private branch exchange side.
[0018]
The microcomputer selects the lines in the sub-line accommodation board as the avoidance lines at a time, thereby accommodating the sub-line accommodation for the main line accommodation board and the external line mixed accommodation type private branch exchange that accommodates the sub-line accommodation board. The board can be effectively used as a backup for the main line accommodation board.
[0019]
In addition, by selecting an extension terminal line via a patch cord as a avoidance line, the microcomputer can effectively use the extension terminal for a private branch exchange of a mixed type of external extension and a patch. Since a cord is used, it is possible to easily cope with a case where the numbers of external lines and internal lines are different. Note that the private branch exchange in this case may be a mixed type of internal and external lines that does not accommodate the sub-line accommodation board but accommodates only the main line accommodation board.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0021]
The line avoidance device 10 includes a line switching matrix 11 and a microcomputer 12 (FIGS. 1 and 2). However, the private branch exchange P is an external line accommodation type having a CTI function and accommodating the external line accommodation boards P1, P1 (FIGS. 1 and 3), and the line switching matrix 11 is accommodated in each external line accommodation board P1. A predetermined number of lines are divided and inserted into the private branch exchange P on the office line L side.
[0022]
A plurality of external telephone lines taking the representative number system from the office line L are connected to the external line accommodation boards P 1 and P 1 of the private branch exchange P via line switching matrices 11 and 11. Each line switching matrix 11 is provided with jumper terminals MA and MB. The jumper terminals MA and MB draw out arbitrary lines of the line switching matrices 11 and 11 and connect them in series, and are connected to the dedicated terminal Q1. It is connected.
[0023]
On the line L side of the line switching matrix 11, a detection unit 13 and a busy setting unit 14 are provided for each line (FIGS. 1 and 2). However, in FIG. 2, only one detection unit 13 and line switching matrix 11 are representatively shown for all lines, and the busy setting unit 14 is not shown.
[0024]
The output of each detector 13 is connected to a microcomputer 12, and a setting switch 12a and a line status indicator 12b are attached to the microcomputer 12. The output of the microcomputer 12 is connected to the line switching matrix 11 via the switching control unit 12c. Furthermore, a power supply 15 is provided to supply power to each part of the line avoidance device 10, and a commercial power supply is supplied to the power supply 15 via an outlet CS.
[0025]
Each detecting unit 13 connects the incoming line detecting unit 13a to the signal lines L1 and L2 of each line via a capacitor C (FIG. 4), and the busy detecting unit 13b via the optical coupler elements LD and LD. Connected and configured. The incoming call detector 13a can detect a call signal transmitted from the side of the office line L via the signal lines L1 and L2 via the capacitor C and output it to the microcomputer 12 as an incoming signal S1 on each line. The busy detector 13b inserts an optical coupler element LD, LD, which is a combination of a light emitting diode and a phototransistor, into one of the signal lines L1 and L2 in the reverse direction, and a busy signal on the signal lines L1 and L2. The current is detected, and the busy state (busy state) of each line can be sent to the microcomputer 12 as a busy signal S2.
[0026]
Each busy setting unit 14 inserts a resistor R through the relay contact RYa to the signal lines L1 and L2 of each line (FIG. 5). However, the resistance value of the resistor R is set so that a current corresponding to the busy signal current on the signal lines L1 and L2 is applied, and a coil (not shown) of the relay contact RYa is connected via the switching control unit 12c. It is assumed that it is driven by the output of the microcomputer 12.
[0027]
When each line of the private branch exchange P is normal, the line switching matrices 11 and 11 are respectively connected to the input terminals IAi (i = 1, 2,... N), IBi (i = 1, 2,... N) on the local line L side. The external line accommodation board P1 of the private branch exchange P and the output terminals OAi (i = 1, 2,... N), OBi (i = 1, 2,... N) on the P1 side are connected in correspondence with n: n ( FIG. 6 (A)). That is, the call signals of a plurality of lines from the external office line L are sent to the private branch exchange P via the input terminals IAi and IBi of the line switching matrices 11 and 11 and the corresponding output terminals OAi and OBi, respectively. The external line accommodation boards P1 and P1 are reached, and the private branch exchange P can normally process incoming calls. At this time, the incoming call detection unit 13a included in the detection unit 13 of each line detects the call signal from the office line L and generates the incoming signal S1, but the microcomputer 12 at this time is connected to the private branch exchange P Does not perform any special operation by normally automatically answering within a predetermined set number of calls.
[0028]
When any one line in the private branch exchange P fails, the microcomputer 12 does not normally respond automatically to the line, and the incoming signal S1 from the line detection unit 13 is generated exceeding the set number of calls. Is detected and a failure of the line is detected. Therefore, the microcomputer 12 at this time switches the connection state of the line switching matrices 11 and 11 via the switching control unit 12c, and sets a normal line that is not busy as an avoidance line via the line switching matrices 11 and 11. Select lower priority.
[0029]
For example, when the failure of the highest line corresponding to the output terminal OA1 is detected (FIG. 6B), the microcomputer 12 confirms that the lowest line corresponding to the output terminal OBn is not busy. By connecting the terminal IA1 to the output terminal OBn, the line corresponding to the output terminal OBn is selected as the avoidance line. At this time, the microcomputer 12 generates a busy signal S2 from the busy detection unit 13b in the line detection unit 13 that the line corresponding to the input terminal IBn and the output terminal OBn is not busy. Can be confirmed based on not.
[0030]
Further, the microcomputer 12 operates the busy setting unit 14 of the line for the input terminal IBn of the line selected as the avoidance line. That is, when the calling signal arrives at the input terminal IBn from the local line L side, the microcomputer 12 closes the relay contact RYa of the busy setting unit 14 for a predetermined short time and operates the busy setting unit 14 to The L side is busy. Note that the output terminal OA1 side avoided by the failure may be left open. In addition, when the lowest line to be selected as the avoidance line is busy, the microcomputer 12 selects the next higher order line in order and makes the station line L side of the line busy. To do.
[0031]
Subsequently, when a failure of another line corresponding to the output terminal OAn is detected (FIG. 6C), the microcomputer 12 is an input terminal that is the next higher order line from the lowest order line as an avoidance line. The line corresponding to IBn-1 and output terminal OBn-1 is selected, and the line busy setting unit 14 is activated for the input terminal IBn-1 of the line to speak the local line L side of the line. Make it inside. At this time, however, the microcomputer 12 confirms that the line is not busy before the line corresponding to the input terminal IBn-1 and the output terminal OBn-1 is selected as the line for avoidance. Shall.
[0032]
Similarly, every time a failure of an arbitrary line is detected, the microcomputer 12 can select a normal line that is not busy as a line for avoidance with a lower priority through the line switching matrices 11 and 11. . If a failure is detected in the line selected as the avoidance line, the microcomputer 12 reselects another higher-order line as the avoidance line. However, the number of times of reselection in this way is limited to the upper limit number of times set via the setting switch 12a. In addition, the number of lines to be avoided for failure of two or more lines is limited to the upper limit number of lines set via the setting switch 12a.
[0033]
When the microcomputer 12 detects a failure of an arbitrary line in the private branch exchange P, the microcomputer 12 can be set via the setting switch 12a so as to select the dedicated terminal line for the dedicated terminal Q1 as the avoidance line. For example, when a failure of the line corresponding to the output terminal OA1 is detected, the microcomputer 12 can directly connect the input terminal IA1 to the dedicated terminal Q1 via the jumper terminals MA and MB of the line switching matrices 11 and 11. (FIG. 6 (D)). Examples of the avoidance by the dedicated terminal Q1 include failure of the highest line corresponding to the representative number, failure of all lines due to the system failure of the private branch exchange P, avoidance operation exceeding the preset upper limit number or the upper limit number of lines, etc. It is preferable to set for. In FIG. 6D, only one common terminal Q1 is prepared for the line switching matrices 11 and 11, but instead of this, a dedicated terminal Q1 may be prepared for each line switching matrix 11. Good.
[0034]
Further, the microcomputer 12 can display line states such as a busy state and a ringing state on the line state display 12b in real time in addition to the normal state and failure state of each line.
[0035]
[Other embodiments]
The line switching matrix 11 can be inserted in common to both the local line L side and the extension terminal Q2 side with respect to the private branch exchange P of the external line accommodation type that accommodates the external line accommodation board P1 and the internal line accommodation board P2. 7, FIG. 8).
[0036]
A detection unit 13 and a busy setting unit 14 are provided for each line on the station line L side of the line switching matrix 11, and for each line on the extension accommodating board P 2 side of the private branch exchange P. A middle setting unit 14 and a detection unit 16 are attached. However, only the busy detector 13b using the optical coupler elements LD and LD is incorporated in the detector 16 (FIG. 9).
[0037]
When each line of the private branch exchange P is normal, the line switching matrix 11 associates the input terminal IAi on the local line L side and the output terminal OAi on the external line accommodation board P1 side of the private branch exchange P with n: n, An output terminal OBi on the extension accommodating board P2 side of the private branch exchange P and an input terminal IBi on the extension terminal Q2 side are connected in correspondence with n: n (FIG. 10A). Therefore, the private branch exchange P can normally process incoming calls for external telephones according to a call signal from the office line L, and can perform incoming call processing for internal telephone calls according to a call signal from the extension terminal Q2.
[0038]
When any one line in the private branch exchange P fails, the microcomputer 12 selects an extension terminal line for the extension terminal Q2 that is not busy as a line for avoidance via the line switching matrix 11 (FIG. 10B )).
[0039]
For example, when detecting the failure of the line corresponding to the output terminal OA1, the microcomputer 12 determines that the extension terminal line corresponding to the input terminal IB1 and the output terminal OB1 is on the basis of the absence of the busy signal S2 from the detection unit 16. After confirming that it is not in the middle, the input terminal IA1 is directly connected to the input terminal IB1, and the output terminal OB1 is continuously connected to the extension accommodating board P2 side of the private branch exchange P via the busy setting unit 14 of the line. Be busy. When the extension terminal line of the input terminal IB1 and the output terminal OB1 is busy, the microcomputer 12 selects the next extension terminal line corresponding to the input terminal IB2 and the output terminal OB2 as the avoidance line. That's fine. The microcomputer 12 repeats the same avoidance operation via the line switching matrix 11 every time another line failure occurs in the private branch exchange P.
[0040]
The line switching matrix 11 may be applied to the private branch exchange P of the external line mixed accommodation type that accommodates the main line accommodation board P3a and the sub line accommodation board P3b (FIGS. 11 and 12).
[0041]
A detection unit 13 is provided for each line on the station line L and the extension terminal Q2 side of the line switching matrix 11, and the line on the station line L side of the line switching matrix 11 and the line on the extension terminal Q2 side Between these, a patch panel 17 using a patch cord 17a is interposed.
[0042]
When each line of the private branch exchange P is normal, the line switching matrix 11 connects the input terminal IAi on the side of the office line L and the extension terminal Q2 and the output terminal OAi on the main line accommodation board P3a side of the private branch exchange P to n: n is connected corresponding to n (FIG. 13A). Therefore, the private branch exchange P can use the main line accommodation board P3a to normally process incoming calls from the office line L and to receive incoming calls from the extension terminal Q2.
[0043]
If any one line in the main line accommodation board P3a of the private branch exchange P breaks down, the microcomputer 12 selects the lines in the sub line accommodation board P3b collectively as an avoidance line via the line switching matrix 11 ( FIG. 13B). That is, the microcomputer 12 can collectively switch all of the input terminals IAi to the output terminal OBi on the sub-line accommodation board P3b side via the line switching matrix 11.
[0044]
Further, the microcomputer 12 uses an extension line via the patch cord 17a as an avoidance line when a failure occurs in the sub line accommodation board P3b or when all lines fail due to a system failure of the private branch exchange P. The extension terminal line for terminal Q2 is selected ((C) in the figure). For example, when the line L on the office line L is connected to the input terminal IA1, the extension terminal Q2 is connected to the input terminal IAn, and the relay input terminals IB1 and IBn are connected via the patch cord 17a, The microcomputer 12 opens the output terminal OA1 and connects the input terminals IA1 and IB1 through the line switching matrix 11, and connects the input terminals IAn and IBn to connect the input terminal IA1 through the patch cord 17a. It can be directly connected to the extension terminal Q2 corresponding to the input terminal IAn.
[0045]
【The invention's effect】
As described above, according to the present invention, the microcomputer is provided to a specific line of the private branch exchange by including the line switching matrix and the microcomputer that avoids a faulty line of the private branch exchange via the line switching matrix. When it is detected that a failure has occurred, the private branch exchange side of the line can be automatically switched to another line, and the incoming call function from the outside can be maintained. Even if it partially or wholly goes down due to runaway, etc., it effectively prevents the fatal situation that the telephone system will lose its function as a whole, and maintains the function of the telephone system normally. There is an excellent effect of being able to.
[Brief description of the drawings]
[FIG. 1] Overall configuration block system diagram (1)
[Figure 2] Overall configuration block system diagram (2)
[Fig. 3] Explanatory diagram of usage state [Fig. 4] Block diagram of main part (1)
[Figure 5] Main part block system diagram (2)
FIG. 6 is a diagram for explaining the operation. FIG. 7 is a view corresponding to FIG. 1 showing another embodiment (1).
FIG. 8 is a view corresponding to FIG. 3 showing another embodiment (1).
[Fig. 9] Main block system diagram (3)
FIG. 10 is an operation explanatory view of FIGS. 7 and 8. FIG. 11 is a view corresponding to FIG. 1 showing another embodiment (2).
FIG. 12 is a view corresponding to FIG. 3 showing another embodiment (2).
FIG. 13 is an operation explanatory diagram of FIG. 11 and FIG.
L ... Office line P ... Private branch exchange Q1 ... Dedicated terminal Q2 ... Extension terminal P3b ... Sub-line accommodation board 11 ... Line switching matrix 12 ... Microcomputer 17a ... Patch cord

Claims (5)

  A line avoidance device for an external line accommodation type private branch exchange which accommodates an external line accommodation board for a plurality of external line telephone lines having a CTI function and adopting a representative number system, and is a line switching inserted into the local line side of the private branch exchange A matrix and a microcomputer for avoiding a faulty line of the private branch exchange via the line switching matrix, and the line switching matrix has a call signal from the station line side and a busy line on each line Each line is provided with a detection unit that outputs the status to the microcomputer as an incoming signal and a busy signal, respectively, and the microcomputer generates an incoming signal from the detection unit exceeding the set number of calls. When a line failure is detected, a normal line that is not busy is determined as an avoidance line based on the absence of a busy signal from the detection unit. Line avoidance apparatus characterized by selecting a lower priority.   A line avoidance device for a private branch exchange having an external line accommodation board and an internal line accommodation board having a CTI function, which is inserted into both the local line side and the extension terminal side of the private branch exchange A switching matrix, and a microcomputer for avoiding a faulty line of the private branch exchange via the line switching matrix. The station line side of the line switching matrix has a call signal from the station line side and a talk of each line. Each line is provided with a detection unit for outputting to the microcomputer as an incoming signal and a busy signal as an incoming signal and a busy signal, respectively, and an extension accommodating board side of the line switching matrix provides the busy state of each line as a busy signal. A detection unit for outputting to a computer is provided for each line, and the microcomputer has an incoming signal from the detection unit on the local line side exceeding the set number of calls. When a line failure of the private branch exchange is detected, the extension terminal line that is not busy is selected as an avoidance line based on the fact that no busy signal is generated from the detection unit on the extension accommodating board side. A circuit avoidance device characterized by: On the extension accommodation board side of the line switching matrix, a busy setting unit is provided for each line, and the microcomputer selects the extension terminal line selected as an avoidance line via the busy setting unit on the private branch exchange side. 3. The line avoidance device according to claim 2 , wherein the line is continuously busy.   A line avoidance device for a private branch exchange having a CTI function and accommodating a main line accommodation board and a sub line accommodation board, and switching between lines to be inserted into the office line side and the extension terminal side of the private branch exchange A matrix, and a microcomputer for avoiding a faulty line of the private branch exchange via the line switching matrix. The station line side and the extension terminal side of the line switching matrix include a call signal from the station line side, Each line is provided with a detection unit that outputs the busy state of the line as an incoming signal and a busy signal to the microcomputer, and the microcomputer generates an incoming signal from the detection unit exceeding the set number of calls. When a failure of one line in the main line accommodation board of the private branch exchange is detected, the line in the sub line accommodation board is used as an avoidance line. Line avoidance apparatus characterized by Batch select. A patch panel using a patch cord is interposed between the line on the office line side and the line on the extension terminal side of the line switching matrix. When the system of the private branch exchange is down, the microcomputer 5. The line avoidance apparatus according to claim 4 , wherein an extension terminal line is selected as an avoidance line via a code.

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