JPH03158096A - Telephone exchange - Google Patents

Abstract

PURPOSE:To avoid malfunction in the case of new line wire call while a line wire is busy by deciding it to be a line wire call after a line wire is once disconnected when a succeeding signal is inputted within a 2nd prescribed time after the input of maximum digit number of a dial signal for speech processing and applying line wire call based on a dial signal stored in a storage means. CONSTITUTION:A 1st dial signal is inputted within a 1st prescribed time t1 after hooking and a succeeding dial signal is not inputted till a 2nd prescribed time t12 elapses after the input of a maximum digit number of the dial signal for speech processing, then it is discriminated to be the arrival of a dial signal for speech processing during line wire talking and the stalking processing is executed. Moreover, when the succeeding dial signal is inputted within the 2nd prescribed time t12, it is decided to be line wire dialing after disconnection of the line wire once and line wire dialing is processed based on a dial signal stored in a storage means. Thus, the speech processing during line wire talking and the line wire dialing are surely identified and malfunction for new line wire dialing during line wire talking is prevented.

Description

[Detailed Description of the Invention] [Field of Application of R Tojo] The present invention relates to a telephone exchange device that switches and forms communication paths between external lines and internal lines, or between internal lines, and enables external and internal phone calls using commercially available telephones. It is. [Conventional Technique 1 The system configuration of this type of telephone exchange equipment is shown in Fig. 9.
This telephone exchange equipment includes a telephone exchange A connected to a central telephone office E via a division nG and a security nH at an outside Ist +;
The telephone exchange A is connected to a plurality of telephone sockets) B connected to extension r2 and controls ls and tb, respectively, and to which a commercially available telephone C is detachably connected. Switch and form a communication path between the internal Mtz or extension 12, and connect the telephone outlet BI to the connected telephone C.
You can now make external calls and internal calls. In addition, in this telephone exchange device, the door phone D is connected to the telephone exchange A in call #I14, and the telephone C can also be used to make a door phone call. Each telephone outlet B is provided with a monophonic jack M, through which a general commercially available telephone C can be detachably connected. In addition, this telephone outlet)B is sent via the control #AI13, and is sent via the control #AI3. It is equipped with a light-emitting display section Lm and Lb that distinguishes the display signal, which is a voltage signal, and indicates whether an internal call is in progress or an external call is in progress. The ISP and the light emitting indicators L a and L b are designed to perform notification and display operations. Note that the volume of the speaker SP can be adjusted using a volume control switch vS. As shown in FIG. 10, the telephone exchange A of this telephone exchange apparatus has a relay contact r for each extension 12 to which the telephone MC is connected.
, ~"1.7 dial pulse (DP) detection circuit 2
1-2. and communication current supply circuit 4. - 4, and further includes an incoming call detection circuit 5, a direct current coupling circuit 3, a DP generation circuit 6 for making an outside line call with a dial pulse, and a push button (Pa) guyarer 7 for making an outside line call with a push button F-on.
, an outside line dial tone detection circuit 8 that detects an outside M dial tone, a hold tone exit circuit 9 that sends out a hold tone, a cross-point switch 10 that sets a call route, PB receivers 12 and 13 that receive push button signals, and various other components. A sound generation circuit 17 that generates a notification sound, a display control circuit 18 that displays the call status at a telephone outlet (B), an amplifier AMP, a diode bridge DB (D"") G+ to G5, and each of the above circuits and those described below. A control circuit 11 configured with a CPU that performs control information signal transmission control and signal judgment processing for the circuit
It is equipped with Furthermore, this telephone exchange fiA is equipped with a door phone call detection circuit 14142 for detecting a call from the door phone D and a door phone call circuit 15. Furthermore, although not shown in Fig. 9, this telephone exchange 11 is also connected to a security device and an emergency push button, so that an alarm can be sounded from the telephone socket (B) in the event of an abnormality. . Note that the security signal detection circuit 16 detects the abnormality detection signal from the security device. The operation of this telephone exchange device will be explained. In the telephone exchange 11A, when the power is turned on and the system starts, the control circuit 11 first enters initial settings and then enters a standby state.
It determines whether an off-hook is present, further determines whether an outside line call is received, processes an outside line call, determines whether a doorphone call occurs and processes the doorphone call, determines whether a tip-off call occurs, processes an internal call, and processes an outside line call. Now, when the handset of any telephone C is picked up, the DP41! The control circuit 2 detects the off state and outputs a detection signal to the control circuit 11. At this time, the control circuit 11 connects the relay contacts r1 to r3, which are normally switched to external lines p and *, to the cross point switch 10911.
and send a pseudo-transmission signal consisting of 400 Hz.
Send it to the off-hook telephone IIC through Z1, and at the same time control the display control circuit 18 to light up the light-emitting display section La for indicating that an outside call is in progress at each telephone outlet) B. This 101 transmission signal continues until the dial signal is input, and the first dial signal is sent to the hook/DP detection circuit 2.
When detected, the control circuit 11 stops outputting the pseudo call signal, stores the dial data in a built-in FIFO type buffer memory, and at the same time operates a self-selected 3-second timer. When the second dial signal is detected while this timer is operating, the control circuit 11 determines that it is an outside line call, and
If the second dial signal is not input within 3 seconds after completing the outside line call processing, it is determined that the call is an extension call, and the extension call processing is performed. Now, in the case of making an outside line call, the control circuit 11 sequentially stores the dial signals that are subsequently input to the puff 7 memory, operates the DC closing circuit 3, and the outside line dial tone detection circuit 8 detects the outside line dial tone. When detected, the dial data stored in the bar/77 memory is read out sequentially from the first one,
The dial pulse generating circuit 6 is operated to sequentially send dial signals to the outside line l. Then, when the dial data stored in the buffer 7 memory is exhausted and a certain period of time has passed, the phone 8 goes off-hook! The relay contact r is switched to connect the extension line 12 to which the IC is connected to the outside line 11, thereby making it possible to make an outside line call. Next, in the case of an extension call, when 3 seconds have passed after inputting the first dial signal, the control circuit 11 determines that the call is an extension call, and lights up the lights from the OFF button on telephone *C. The light-emitting display section La of telephone outlet) B indicating that an outside call is in progress is turned off, and at the same time, the light-emitting display section Lb indicating that an extension call is in progress is turned on. At the same time, the control circuit 11 controls the sound generation circuit 17 to send a notification signal for an extension call to the telephone outlet B connected to the called telephone's chat via the control mi3, and from the speaker SP of the telephone outlet B. Make the extension ring sound. Note that this notification signal is sent out superimposed on the display signal. Then, when the handset of the connected telephone C is picked up by this extension ring tone, the hook/DP detection circuit 2 detects this off-hook, and the control circuit 11 detects the off-hook. The ringer is stopped, and the cross-point switch 10 connects the extension 12 to which the calling telephone C is connected to the extension 12 to which the telephone MC of the called party is connected, making it possible to make an extension call. do. Next, the outer #I coral will be explained. When an outside call is received, a built-in bell rings in each telephone C. The incoming call signal at this time is detected by the incoming call detection circuit 5, and the incoming call detection signal is input to the control circuit 11. If the handset of telephone C is picked up in response to the ringing of the built-in bell of telephone C, an outside call can be made. When the telephone WIC is off-hook in this manner, the control circuit 11 lights up the light-emitting display section La of each telephone outlet B in accordance with the output of the hook/DP detection circuit 2 to indicate that an outside line call is in progress. By the way, in this telephone exchange device, it is possible to put an outside line call on hold during an outside line call and make an internal call or a doorphone call. , -, when a dial signal corresponding to hold is input from the telephone C during an outside line call, the control circuit 11 reads this dial data and
122 as an outside line! , and the DC connection circuit 3
is activated to put the outside line 11 on hold. Then, the control circuit 11 operates the hold tone generation circuit 9 to send the hold tone 70 days to the outside fllA e + via the coupling transformer T, notifying the other party of the outside call that the call is on hold, and also to each telephone outlet. A hold tone melody is also sent to B to make the user aware that the call is on hold, and at the same time, the display control circuit 18 is controlled to display a double-light display for when the call is in progress!
Both sLa and Lb are turned on to display that the process is on hold. Now, after entering the above-mentioned hold state, if a dial signal for making an extension call or doorphone call is input from telephone C, the extension call processing described above or the doorphone call processing described later is performed, and the extension call or doorphone call processing is performed. Calls can be made. In order to prevent the dial signal input from the telephone WIC during an outside line call from being output to the outside line 11, the DC connection circuit 3 is temporarily closed at the same time as the dial signal is input. An extension call or the like that is on hold is terminated by turning telephone C on-hook, and returning to the hold state by picking up the handset of telephone C again. If you wish to make another external call, call 11c.
Input the dial signal for canceling the hold from the button to cancel the hold. In this case, the control circuit 11 stops the operation of the hold music exit circuit 9, and controls each part to return to the original outside line call state.
Return to outside A1 call state. After canceling the hold, if you want to end the call, just turn on the telephone IIC (77). The case where there is a doorbell call will be described below. When making a call from the door phone D, press a push button provided on the door phone D. Pressing of this push button is detected by the door phone call detection circuit 14, and the control circuit 11 responds to this detection output.
operates the sound generating circuit 17, and sounds the doorbell ringing tone from each telephone outlet (B). Then, when the handset of any telephone C is picked up in response to the doorbell ringing, the control circuit 11 is activated by the output of the 77/DP detection circuit 2 provided at the extension 12 to which the off-hook telephone C is connected. switches the cross-point switcher 10 to connect the telephone C from which the handset has been picked up to the door intercom call circuit 15 to enable door intercom call. By the way, this doorbell call is from outside Mi! Even when J is on call, the call is made from telephone outlet B, and if a dial signal specifying door phone D is input from telephone @C after the above-mentioned hold in response to this call, the outside line is put on hold and the door phone call can be made. In addition, in the above explanation, a dial-pulse type phone was used as the telephone C, and the external line 1, which is a public telephone line, was a dial-pulse line, but the external line 2. is a push-button line, and when a push-button telephone C is used, the above-mentioned method is used, except that the PB Guyara-7 sends out the dial signal and the PB receiver 12-13 detects the dial signal. Works as described. Problem 1 to be Solved by the Invention However, in order to be able to receive services such as call waiting in this type of conventional telephone exchange device, it is necessary to distinguish between hooking and call termination. Therefore, if a certain period of time (for example, 2 seconds) has elapsed since the call end detection was turned on-hook, it is determined that the call has ended. Therefore, even if the call is on-hook within the predetermined period of time, it is not determined that the call is over, so if a new outside line call is to be turned on after an outside line call, an on-hook period of 2 seconds or more is required. Here, if dialing is started after on-hook within the above-mentioned fixed time, the W1 function that prevents the dialing signal for call processing such as hold operation during an external line call from being output to the external I/lAl1 is activated, and the external line is dialed. This is an inconvenient operation for users who make consecutive calls. However, if the first dial signal of the number of the called party above matches the dial signal for hold,
A hold process is performed, and the user may feel that it is a malfunction. Therefore, if a dial signal is input within a certain period of time after the above-mentioned hooking is input, the control circuit 11 determines that this is an outside line origination operation after the outside line has been temporarily disconnected, and performs an outside line origination process. A telephone exchange apparatus having the above-mentioned structure has been proposed by the present inventors in Japanese Patent Application No. 1-16439'4. In this way, even if the user is on-hook within the predetermined time, it is possible to prefer making an outside line call. However, in this type of telephone exchange equipment, a push-button type phone is sometimes used as telephone C, and in this case, there is a risk that the dialing signal from the other party's telephone will cause the call to be placed on hold or other processing. There is a system in which call processing during a call is performed by inputting a dial signal for call processing after performing 7-/king, and ends by identifying the dial signal from the other party on the outside line. In such a telephone exchange device, even if a dial signal is input after hooking, it does not necessarily mean that it is an outside #I call, and there is a problem in that it is not possible to distinguish between call processing during an outside line call and an outside line call. The present invention has been made in view of the above-mentioned α, and its purpose is to use a push-button type telephone and input a dial signal for call processing after hooking, so that a call can be made with a foreign woman. The purpose of the present invention is to eliminate the inconvenience and malfunction when making a new outside call after making an outside call, even in a telephone switching device that handles call processing. [Means for Solving Problem 1] The present invention achieves the above object. hooking detection means for detecting hooking by a telephone during an outside call;
A clocking means for timing the time opening from hooking, a storage means for storing the input dial signal, and when the dial signal is not input within a fixed time @1 after hooking,
Continuing the outside line call state, the first dial signal is input within the first fixed time after hooking, and the fixed time of tltJ2 reaches yi after the maximum number of digits of the dial signal for call processing is input. If the next dial signal is not input, it is determined that the dial signal is for call processing during an outside line call, and call processing is executed, and if the next dial signal is input within the second fixed time, and a control means that determines that the operation is to make an outside line call after disconnecting the outside line, and performs an outside line call process based on the dial signal stored in the storage means. In addition, in consideration of the case where the user immediately turns on the telephone, assuming that the hold operation has been performed immediately after the user performs the hold operation, the above-mentioned control means may be configured to After that, if a dial signal for hold is input within the first fixed time and the telephone is turned on-hook before the subsequent fixed time of clam 2 elapses, the hold processing may be performed. [Function] As described above, in the present invention, the first dial signal is input within the first fixed time after hooking, and the second fixed time is input after the maximum number of digits of the dial signal for call processing is input. If the next dial signal is not input by the time the next dial signal has elapsed, it is determined that the dial signal is for call processing during an outside line call, the call processing is executed, and the next dial signal is input within the above-mentioned second fixed period of time. If there is an input, it is determined that the outside line is to be made after the outside line has been disconnected, and the outside line is made based on the dial signal stored in the storage means, so that the push-button telephone is used to make an outside line call. Even in telephone exchange equipment, which performs internal call processing by inputting a dial signal for call processing after hooking, it is possible to reliably distinguish between call processing during an outside line call and an outside line call, and to make a new outside line call during an outside #I call. In addition, if the next dial signal is input within a certain period of time after entering the maximum number of digits of the dial signal for call processing, the outside line will be temporarily disconnected. By determining that it is an outside line call operation after the call has been made and performing the outside line call processing, the on-7? This allows you to make an outside call even when the waiting time is short, making it convenient for making consecutive calls. Furthermore, if the control means is 7? during an outside line call? After King, 1st
If a dial signal for hold is input within a certain period of time, and the telephone goes on-hook before a certain period of time elapses after that, the call will be placed on hold, and as soon as the user performs the hold operation, When the telephone is immediately turned on, assuming that the hold processing has been carried out, it is possible to prevent the telephone from being disconnected, thereby improving usability. [Embodiment j Figures 1 to 8 show an embodiment of the present invention. The circuit configuration of this embodiment is exactly the same as that of the conventional example, and the feature of this embodiment lies in the call processing method during an outside line call. In addition, this telephone exchange Wcff! In this case, a push-button type telephone 11c is used to process calls during an outside line call by performing a combination of hooking and inputting a dial signal (hereinafter, this operation is referred to as a command). However, - Simultaneous paging is an operation that calls all telephones C, and doorphone connection is an operation that responds to a call from doorphone D. For reference, the call processing and operations when making an outgoing call are shown below.
In this embodiment, 7? 7 to detect the hour? king detection means, a plurality of types of timers as time measurement means for measuring the time since hooking, a buffer 7 memory as storage means for storing input dial signals, and a first predetermined period of time after hooking (for example, 5
seconds) If no dial signal is input within 1+, the outside call state continues, and the first fixed time t after 75/King,
The first dial signal is input within a second period (for example, 2 seconds) t,! If the second dial signal is not input by the time , the call is processed by determining that the dial signal is for call processing during an outside line call, and the second dial signal is input within the second fixed period of time (,2). If the second dial signal is input, the controller determines that the operation is to make an outside line call after the outside call has been terminated, and performs an outside line call process based on the dial signal stored in the buffer memory; 11. The characteristic operation of this embodiment will be explained below. Fig. 1 shows a state transition diagram of the telephone exchange equipment of this embodiment, and Fig. 12 shows A more detailed state transition diagram when hooking is performed during an outside line call is shown. First, we will explain the case where the user performs 7? king during an outside line call in order to receive a call waiting service, for example. Figure #S3 ( When hooking is performed as shown in a), the control circuit 11 clears the contents of the buffer 1 memory and starts the timer operation for counting the first predetermined time t1, resulting in the state shown in FIG. 2! !!In the transition diagram, when an outside line call is in progress (the turtle state in the diagram), the transition goes to step 1 (bl) (Figure 3 (d)).Here, if you want to receive a call waiting service, the call wait time is within the timer's time limit t1. Since there is no manual dialing signal, after the time limit has elapsed, by returning to the outside line call state (a), the outside line call state continues and the call waiting service can be received as before.Here, The above-mentioned darkness at time t is obtained by disconnecting the four relay points r from the external wire 11 as shown in FIG. 3(c) and operating the DC coupling circuit 3 as shown in FIG. 3(b). (The state is bl3. Figure 3(e) shows the signal transmission state on the outside line 11. However, in the outside line call state (a) in Figure 2, a dial signal is input from dial pulse type telephone C. in case of,
Call route I during an outside line call based on that dial signal! !
(For example, the hold processing explained in the conventional example) is executed (indicated by C in FIG. Control circuit 1 depending on the dial signal
1 does not perform any processing.Furthermore, when an outside line call is terminated by on-hook with a dial pulse type telephone fiC and a new dial is made to make an outside line call, the method described in the conventional example JP-A-1- In substantially the same way as No. 164394, when a dial signal is input within a certain period of time t1, the control circuit 11 determines that an outside line call is being made after the end of an outside line call? 4 Definitely perform the outside line origination process (@ - in the diagram Il'12)
4b, → d1), and step 1 (bl
), the buffer memory clearing process is repeated and the state remains in step 1 (bl). Next, when performing a call processing operation other than a hold operation, for example, when calling all at once after being put on hold, the telephone C
After hooking, the dial signal "9" is input to cause the call to be called all at once after being put on hold within the above-mentioned time and 4. 7 in this case? King') Figure 12 shows an outside line call letter! ! ! (
Step a) moves to step 1 (bl), and by inputting a dial signal, step 1 (bl>) moves to step 2 (
Move on to b2). Note that when the dial signal is input in step 1 (b,), the timer that measures the second predetermined time t1□ starts the time-limiting operation, stores the dial signal in the buffer memory, and stores the dial signal as indicated by the dial signal. The command, which is the content of the call processing, is stored in another buffer 7 memory, and the process moves to step 2 (bi). In this case, only a one-digit dial signal is input, so when the time limit t11 of the timer has elapsed in step 2 (b2), the command during an outside line call is executed (C in FIG. 2). ), a simultaneous call is made as shown in FIG. 4(d). When ending an outside line call and making an outside line call, Figure 5 (a)
After hooking, input a dial signal of 2 or more digits as shown in . Therefore, in this case as well, 7
The process moves to step 1 (b,) by γ-king, and to step 2 (b2) by inputting the first dial signal. Furthermore, in this case, in step 2 (b2), the second dial signal is input within the above-mentioned fixed time t12, so in this case, the timer for time-limiting 2 on the time open side is cleared, and further Fixed time (2 seconds) t2. The dial signal input at that time is sent to buffer 7.
At the same time as writing to the memory, the command is stored in the buffer memory, and the process moves to step 3 (b3). When the third dial signal is input in step 3 (b3), the dial signal and command are written into the buffer memory, and then the outside line 11 is temporarily disconnected in order to terminate the outside call. do. This cutting of the external wire e is carried out by temporarily inactivating the DC connection circuit 3, which is in operation during the signal processing, as shown in FIG. 5(b). FIG. 5(e) shows a state in which the external line is cut off in this case. After disconnecting the outside line, the PB dialer 7 transmits the dial signal to the outside #11, as shown in FIG. 5(e), based on the dial signal stored in the buffer memory. (indicated by d2 in FIG. 2). Note that if the third dial signal is not input within a certain period of time h3 in step 3 (b3) as shown in Figure 6, this dial signal is considered to be an invalid dial and the outside line call is terminated. Status! Return to 1(a). That is, in the case of this embodiment, the command for call processing is one digit, and the command for making an outside line is at least three digits. A hold operation that was not included in the above explanation (in addition, the #11th dial signal after ending the external call is 0)
(including outside line origination processing in the case of When placing the call on hold, input the dial signal "0" after 7 dials. In this case, an outside line call letter will be sent by 7TSUNG! 1
Transition from (a) to step 1 (bl), and step 1 (
When a dial signal "0" is input within a certain time t in bl), this dial signal is written to buffer memo +7, and a timer that expires at the N11th time is operated, and the process moves to step 4 (bl). . Then, in the case of this hold operation, no dial signal is input from then on, so the time limit 112 of the above-mentioned timer has elapsed, and at this elapsed point, the command during the external line call is executed (the second
C) in the figure, that is, a hold process is performed. In addition, in this embodiment, considering that the user may think that the hold processing will be performed immediately after inputting the hold command and turn on the telephone C immediately after inputting the command, step 4 (b) is performed. 7, even before the time limit t12 has elapsed, the book is placed on hold as shown in FIG. ! ! (standby state). However, other steps 1 (b,
) to step 3 (b,) and step 5 (described later)
b,) If you book on-book, it will be off! ! 1 (not on hold). By the way, in this telephone exchange device, when a call is made after being put on hold, the dial signal is sent after 7-/King as shown in the table above.
For example, this can be done by inputting a dial signal ``9'' (for example, ``9''), but after hooking, a hold operation is performed to input the dial signal @O'', and then, for example, a new dial signal ``9'' for simultaneous ringing is input. Therefore, in this embodiment, it is possible to deal with this case.In other words, as shown in No. 81!1(a), after hooking, the dial signal ``0''''''9'' is input. Assuming that a digit has been entered, the process moves to step 4(b,) as described above with the 7-/king and the dial signal "'0", and this step 4
In (b4), when the second dial signal "9" is input within the fixed time tlf, the timer that times out the time fil t l 2 is cleared, the timer that times out the time 123 is activated, and the dial signal is is stored in the buffer memory, and the process moves to step 5 (bs). In this case, since the second and subsequent dial signals are not input, the hold process is executed after the time limit t23 has elapsed, and then
- execute a general call command (indicated by e in Figure 2);
Here, if the third dial signal is input, the outside line originating process shown at d2 in FIG. 2 is executed. In addition to inputting the dial signal "7" after hooking, a doorphone call during an outside line call can also be made by inputting the dial signal "O""7" after hooking. By the way, if hooking is performed in steps 2 to 5 above, the process can be returned to step x(b+), and in this case, the stored contents of the buffer 7 memory are cleared. In addition, in the above explanation, the case where the dial signal for call processing is all one digit except for the hooking for call processing during an external call, but the first dial signal within the first fixed time opening t1 after hooking is If a dial signal is input and the next dial signal is not input until the second fixed time period t12 has elapsed after inputting the maximum number of digits of the dial signal for call processing, the dial signal for call processing during an external call is used. If it is determined that there is a call and the next dial signal is input within the second fixed time opening t12, the outside line is called! If it is determined that the operation is an outside line call operation after disconnecting , and the outside line call process is performed, it is possible to handle cases where the dial signal for call processing is two or more digits. [Effect of the Invention 1] As described above, the present invention provides a control means for controlling the clam 1 after hooking.
If the 18th dial signal is input within a certain period of time, and the next dial signal is not input before the second period of time elapses after inputting the maximum number of digits of the dial signal for call processing, an outside line is It determines that the dial signal is for call processing during a call and executes the call processing, and if the next dial signal is input within the second fixed time period, the outside line dialing operation is performed after the outside line is once disconnected. Since it is determined that there is a call and the outside call processing is performed based on the dial signal stored in the storage means, a push-button type telephone is used, and after 77 calls are processed during the outside call, the dial signal for call processing is input. Even in a telephone exchange device that performs a telephone exchange, it is possible to reliably distinguish between call processing during an outside line call and an outside line call, and to eliminate malfunctions when making a new outside line call during an outside line call. In addition, if the next dial signal is input before the second fixed time period elapses after inputting the maximum number of digits of the dial signal for call processing, it is determined that the operation is an outside line origination operation after the outside line has been temporarily disconnected. Since the outside line call process is executed after the call has been completed, it is possible to make an outside line call even when the on-hook time for ending the call is short, which is convenient when making consecutive calls. Further, the control means, after 77 calls during an outside line call,
If a dial signal for hold is input within a certain period of time, and the telephone goes on-hook before a second certain period of time elapses, the hold processing will be performed. When the telephone is immediately put on the hook, assuming that the hold processing has been carried out immediately, it is possible to prevent the telephone from being disconnected, thereby improving usability.

[Brief explanation of the drawing]

FIG. 1 shows the operation state 1 of the present invention! ! Transition diagram, Figure 2 is a state transition diagram of main operation, Figures 3 to 8 are explanatory diagrams of the same operation as above, Figure 9 is a system configuration diagram of the telephone exchange, and Figure 10 is a circuit diagram of the telephone exchange. It is. A is an exchange, C1, tm packing machine, E is a telephone office, 11 is a control circuit, / is an outside line, and e2 is an extension line.

Claims (2)

[Claims] (1) A telephone exchange connected to a telephone office via an outside line;
It consists of a plurality of commercially available telephones connected to this telephone exchange by extension lines, and the telephone exchange switches and forms communication paths between outside lines and extensions, or between extensions, so that outside calls and extension calls can be made using the telephones. hooking detection means for detecting hooking by the telephone during an outside line call, in a telephone exchange device that performs call processing during an outside line call when a push-button type telephone is used by inputting a dial signal for call processing after hooking; , a clock means for measuring the time since hooking; a storage means for storing the input dial signal; If the first dial signal is input within the first fixed time period and the next dial signal is not input until the second fixed time period elapses after the maximum number of digits of the dial signal for call processing is input, It determines that the dial signal is for call processing during an outside line call and executes the call processing, and if the next dial signal is input within the second fixed time, the outside line is temporarily disconnected and then the outside line is made. and control means for determining that the dial signal is stored in the storage means and performing an outside line originating process. (2) If the control means receives a hold dial signal within a first fixed period of time after being hooked during an outside line call, and the telephone is placed on-hook before a second fixed period of time has elapsed, 2. The telephone exchange apparatus according to claim 1, wherein the telephone exchange apparatus performs a hold process.