JPS59176960A - Method for monitoring talk - Google Patents

Abstract

PURPOSE:To prevent an unnecessary voice of the 3rd party from being interferred with a talk during monitor by performing extension talk connection to the 1st or the 2nd extension via a mixing device when the 3rd extension is monitored while the 1st and the 2nd extension are communicated. CONSTITUTION:When a telephone set A requests a monitor of a telephone set B during the call between a telephone set X and the telephone set A, the telephone set A perform hooking operation. When this is received by a network NW, a central controller CC writes an address of a hold sound source and a dial tone sound source to an address of a control memory CM, a hold tone is transmitted to the telephone set X from a channel memory SPM and a dial tone is transmitted to the telephone set A and the telephone set A transmits the dial of the telephone set B. When the telephone set B responds to it and is in the communication with the telephone set A and then the telephone set A performs hooking operation, the controller CC supplies voice data of the telephone sets A and X to the mixing device. As a result, both voice data of the telephone sets A and X are reached to the telephone set B and the voice data of the telephone set B is not reached to any telephone set.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a private branch exchange (PBX) capable of one-way call connection.
) and other call monitoring methods.

Conventional technology and problems Conventionally, when monitoring the content of calls on a private branch exchange, multiparty call connections such as at-on, group, and private calls have been used.
In both cases, while the call is being monitored, unnecessary audio from the third party will interfere with the call because a two-way call connection is being made to the third party, and the call will be interrupted when the third party's monitor is selected. This poses a problem in that the person on the other end of the call becomes aware of the monitor.

OBJECTS OF THE INVENTION It is an object of the present invention to alleviate the problems of the above-mentioned conventional methods and to allow unnecessary voices of third parties to intervene in the telephone conversation being monitored.

Another object of the present invention is to prevent the person on the other end of the call from knowing the monitor selection.

Structure of the Invention According to the present invention, in an exchange that allows one-way call connection, when a call is monitored by the sixth extension during a call between the first extension or another station and the second extension, the first extension A one-way call connection from the extension or other station to the second extension and a one-way call connection in the opposite direction are performed via a mixing device, and the first extension or other station and the second extension are mixed in the mixing device. A call monitoring method is provided, characterized in that a call with an extension is connected on one side to the sixth extension.

Examples of the invention Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 1 is an overall block diagram of a private branch exchange to which a call monitoring method according to the present invention is applied. In FIG. 1, telephones A and B are connected to receiving terminals of a time division network NW via line circuits LOa and LOl, and line circuits Laa and LOb are connected to corresponding transmitting terminals of the network NW. is connected. The network is
It is configured to include multiplex bags P, MPX, channel memory SPM, separation device DMPX, time slot counter ONT, control memory CM, central control unit 00, etc.

Here, the internal switches of the multiplexer MPX and the demultiplexer DMPX are controlled according to the digital output value of the time slot counter ONT. Also, the voice data of the multiplexer MPX is written to the communication path memo IJSPM,
On the other hand, the voice data of the communication path memo IJ S P M is read out and sent to the separating device DMPX, but in this case, the write address WA of the communication path memory SPM is the output value of the time slot counter ONT; The read address RA of the path memory SPM is the output value of the control memory OM. In other words, the speech path memory SPM is performing sequential writing and random reading.

For example, if a telephone call is in progress between telephone A and telephone B, the central control unit OC writes address #b in the address field α of the control memo IJOM, and writes the address field α in the address field as shown in the figure. is written. Therefore, when writing the communication path memo IJ S P M, the time slots Ta and Tb corresponding to the values α and I of the time slot counter ONT are for the telephone A.

B's data Da and Db are carried respectively, and the communication path memory S
They are stored in the PM address wells a and +b, respectively. On the other hand, when reading the communication path memo IJ S P M, when the value of the time slot counter ONT is α, the value #b of the control memory OM is given as an address to the communication path memory SPM; When the value of ONT is I, the value α of control memory OM is given as an address to channel memory SPM, so
Time slot T. , Tb carry data Db and Da, respectively. In this way, the exchange operation is performed.

In other words, the exchange operation is automatically controlled by the central controller oO rewriting the stored contents of the control memo IJOM.

Note that the network NW includes trunk devices connected to other stations, dial tone (DT), and ringing tone (
RT), ringing back tone (RBT), hold music (
T), a sound source device that generates a monitor request sound (P), a mixing device (M), etc. are also connected, but they are not shown.

FIG. 2 is a flowchart for explaining a call monitoring method according to the present invention using the private branch exchange shown in FIG.
A case is shown in which a call between extension telephone X and extension telephone A is monitored by extension telephone B. In addition, in the figure, S is a general term for the receiving terminal of the network NW, and R is a generic term for the transmitting terminal of the network NW.

Step 201 shows an initial state.

In step 202, when a calling signal is sent from the telephone set X, the central processing unit CC writes the address #dt of the dial tone sound source device DT in the address field X of the control memory OM. As a result, dial tone data Ddt is sent to telephone set X from speech path memory SPM. Next, when the first dial digit signal is generated from the telephone set X, the address field dt is deleted from the area of address #X in the control memory OM, and as a result, the transmission of the dial tone data Dcut is stopped.

Next, when the transmission of the dialed digits from the telephone set X is completed, as shown in step 203, the central control unit f((Cj
O is the address # rbt of the ringing back tone sound source device RBT in the address field X of the control memo IJOM.
Write. As a result, ringing backtone data D
rbt is sent to telephone set X from speech path memory SPM. Note that in this case, the ringing tone RG of the telephone A is being sent out, and therefore the telephone (fiA) is being called.

When the telephone person answers, the central control unit y (aa writes address #a and address #a to the areas of address #x and number α of the control memory CM. As a result, as shown in step 204,
Telephone X and telephone A enter into a conversation state.

In the above-mentioned state, if the user of telephone A requests the telephone (IkuB) to monitor, the user of telephone A performs a 7-tuk operation. When this is received, as shown in step 205, the central control unit 00 writes the address t1 of the on-hold tone sound source device T and the address 41dt of the dial tone sound source device WDT in each area of address #X and #-α of the control memory OM.As a result, the on-hold tone data Dt is stored in the telephone set X. The dial tone data Ddt is sent from the call path memory SPM, and the dial tone data Ddt is sent from the call path memo IJ S P M to telephone A. Of course, before performing such a hooking operation, the user of telephone A You should say something to the users, such as ``Please wait a moment.''
This can prevent the user of telephone X from being aware of the monitor.

Step 206 shows a state in which the user of telephone A has completed transmitting the dialed digit signal of telephone B. In other words, the central processing bag Baa is the address field α of the control memory OM.
The address field rbt of the ringing backtone sound source device RET is written in place of the address field dt in the area of . As a result, ringing backtone data Drbt is sent to telephone set A from speech path memory SPM. In this case, the ringing tone RG of the telephone 'tME is being sent out, and therefore the telephone B is ringing.

When telephone B responds, the central control unit 00 writes addresses in the address fields α and #b of the control memory CO. As a result, as shown in step 207, telephone A and telephone B enter a conversation state. In addition,
The hold tone of telephone X is sustained.

Next, when the hooking operation of telephone A is executed, central control unit CO rewrites control memo IJOM as shown in step 208. That is, in each area of address wells X and well α, there is a first address well m of mixing device M.
1. The second address +m2 is written, and as a result, the audio data D□, Da of telephones X and A are temporarily supplied to the mixing device M. On the other hand, address well m1
．． Addresses #X and #α are written in each area of memory m2, and mixing device 'flt,' is written in address #-b.
The sixth address well m3 of M is written. Here, it is assumed that the output of the mixing device M is expressed as (output of Ml) = (+input of vu) - (input of Ml). Therefore, telephone X receives voice data D from telephone A. Only the voice data D of the phone X reaches the telephone A, and the voice data D of both the phones X and A arrive at the telephone B. In other words, the voice data D of the monitor telephone B
b does not reach any phone.

FIG. 3 is also a flowchart for explaining the call monitoring method according to the present invention using the private branch exchange shown in FIG.
A case is shown in which a call between one telephone X and A is monitored by extension telephone B. In FIG. 3, a monitor request is made from the telephone fJB. Therefore, steps 301 to 304 and 307 in FIG. 3 are equivalent to step 20 in FIG.
1 to 204° 208, and steps 305 and 3
Only 06 is different.

That is, if the user of telephone B requests monitoring in the state of step 3o4, a calling signal is sent from telephone B, and as a result, step 30
As shown in 5, the central processing unit CO writes the address dt of the dial tone sound source device DT in the area of the address #b of the control memory OM. As a result, dial tone data De1. t is sent to telephone B from the communication route memo IJ S P M.

Next, when the first dial digit signal is generated from the telephone set B, the address field dt is erased from the address field area of the control memory OM, and as a result, the transmission of the dial tone data D (1t) is stopped.

Next, when the transmission of the dialed digits from telephone B is completed, the central controller and tOC
writes the address #p of the monitor request sound device P in place of the address field X of the telephone set X in the address field a of the control memory CM only for a predetermined period of time. As a result, the transition to monitor operation is transmitted only to the telephone A side. Note that the above-mentioned monitor request sound is connected for such a short time that it does not affect the actual telephone conversation.

The central controller CO then performs step 607, which is similar to step 208 in FIG.

In this manner, in the operation shown in FIG. 6, monitoring can be performed without being recognized by the other party at all.

Note that the operations shown in the flowcharts of FIGS. 2 and 6 both require the condition that telephones A and B are installed within visual range, but the operations shown in the flowchart of FIG. X) is never put on hold, so there is no call interruption.

In addition, in the above-mentioned embodiment, telephones X and A.

Although both telephones B are extensions, only telephone X may be a telephone of another station.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention has the advantage that unnecessary voices of third parties do not interfere with monitored telephone calls.

[Brief explanation of the drawing]

FIG. 1 is an overall block diagram of a private branch exchange to which the call monitoring method according to the present invention is applied, and FIGS. 2 and 3 are for explaining the call monitoring method according to the present invention using the local exchange shown in FIG. This is a flowchart. A, B, +=”J Patent Applicant Applicant Co., Ltd. Patent Application Agent Patent Attorney Akira Aoki Patent Attorney Kazuyuki Nishidate Patent Attorney Yukio Uchida Patent Attorney Akiyuki Yamaguchi

Claims (1)

[Claims] 1. In an exchange that enables one-way call connection,
When a third extension monitors a call during a call between the first extension or another station and a second extension, one-way call connection from the first extension or other station to the second extension, and one-way connection in the opposite direction. A call characterized in that a directional call connection is made via a mixing device, and a call between the first extension or another station and the second extension mixed in the mixing device is one-sidedly connected to the sixth extension. Monitoring method. 2. A call monitoring request for the sixth extension is made on the second extension, and during the call monitoring request, 1) a hold tone is connected to the first extension or another station mentioned in II. The call monitoring method described in . 3. A call monitoring request from the third extension is made on the sixth extension, and during the call monitoring request, one-sided call connection from the first extension or another station to the second extension is interrupted and the monitor request is made. (a) Talk monitoring method according to claim 1, in which a stand is included.