JPS63156467A - Private branch exchange - Google Patents

Abstract

PURPOSE:To immediately send an urgent message to an extension which is registered as an incoming rejecting telephone set by storing specific extension discrimination data, incoming control data, and data indicating a call to an incoming control extension among specific extensions in a main storage device, and connecting a sound source trunk for the call to the incoming control extension among the specific extensions. CONSTITUTION:When an extension telephone set 1a originates and the extension telephone number of a telephone set 1b under incoming control is dialed, the dial number is counted by a central controller 4 to decide the extension call. When knowing that the extension 1b is under the incoming control, the side of the originating extension 1i dials an incoming control calling special number so as to reset the incoming control. When this data is 1, data in an incoming control calling data area is set to 0 and the originating extension 1i and extension 1b are connected through a channel switch 3 under the control of the central controller 4. Consequently, the urgent message is sent immediately from a specific extension installed in the office of a hotel to the extension under the incoming control.

Description

DETAILED DESCRIPTION OF THE INVENTION (→ Industrial Application Field) The present invention relates to a private branch exchange that can provide incoming call restriction services.

(b) Conventional technical incoming call restriction service is a service that, when a specific extension is registered for incoming call rejection, prevents all calls to this specific extension from being connected until the cancellation is performed. This is a particularly effective service for private branch exchanges in hotels, etc. In other words, when you are in a place where a large number of unspecified people gather, such as a hotel, and a celebrity is staying there, you will refuse calls from fans who call you from other extensions or external phones. This is a very effective method.

In the conventional private branch exchange call restriction service, all calls to a specific extension telephone that is registered for call rejection are not connected, and methods such as making the calling extension telephone listen to a busy tone or a special tone are taken. Therefore, it could not be called in case of an emergency or if the user had forgotten the entire release operation.

As a countermeasure to this problem, Japanese Patent Application Laid-Open No. 61-25497 (HO4
As shown in Q3158), if there are consecutive call requests from other extension phones to a specific extension phone that is registered to reject calls, the number of call requests is counted up, and when the number of call requests exceeds a certain value, the two are connected. is also known. However, if you wish to contact a specific telephone extension for urgent matters from another telephone (for example, one installed in a hotel office), the I'1 There is a problem of not being able to make a call in time because you have to call again and again, and there is also the problem of large time loss caused by having to call back many times.

(/→ Problems to be Solved by the Invention The present invention solves the above problems, namely, the inability to communicate urgent matters when dialing an extension that is registered to reject calls, and the problem of having to call again and again. This solves the problem of time loss.

B.) Means for Solving the Problems The present invention provides a plurality of extension telephones, a call path switch connected to the extension telephones via an extension circuit, a central control device connected to the switches, and a central control device connected to the telephone extensions. A main storage device having an area for storing specified extension identification data, an area for storing incoming call restriction data, and an area for storing data indicating a call to the incoming call restricted extension; This is a private branch exchange equipped with a transceiver and a transceiver.

(e) Operation Since the main memory stores specific extension identification data, incoming call restriction data, and data indicating calls to incoming call restricted extensions for all extension telephones, After connecting the sound source trunk for a call to, the specific extension can be controlled to be connected to the incoming call-restricted extension based on the special number dialed from the specific extension using data indicating a call to the incoming call-restricted extension of the specific extension.

(f) Examples The present invention will be explained below with reference to FIGS. 1 to 3. FIG. 1 is a block diagram of a hotel private branch exchange according to an embodiment of the present invention.
FIG. 2 is a layout diagram showing the storage state of data in the main memory, and FIG. 3 is a flowchart showing the main part of a program for performing extension connection processing.

In FIG. 1, (1) is an extension telephone constituted by extension telephones (1a) to (1)) in each room of a hotel, and (1)) is installed in an office of the hotel. (2)
is an extension circuit configured by each extension circuit (2a) to (21) connected to each room's extension (Ia) to (1)),
(31 is an extension circuit (connected to 21 and has a nine-way switch,
(4) is a central control unit.

(51 is a main storage device having a data storage area shown in Fig. 2, which includes a specific extension identification data area (ID) that stores data for identifying specific extensions and general extensions, and data indicating incoming call restrictions. Incoming call restriction data area to store (
FIJ) and an incoming call restriction call data area (RJO) that stores data indicating calls to incoming call restriction extensions. (6) is the central office line trunk, (71 is the PB signal receiving trunk, (8) is the signal tone trunk C first sound source trunk that outputs the normal busy tone), and +9j is the message announcing that incoming calls are restricted. For example, "We are currently blocking incoming calls.

'' is connected to the communication path switch (31) through a talkie trunk (second sound source trunk) that repeatedly outputs ``.''.

Next, the operation of one embodiment of the present invention will be explained.

First, when you register incoming call rejection for extension (Ib), the incoming call restriction data area (FI) in the main memory (5) shown in Fig.
Data "1" indicating that incoming calls are restricted is set in the area corresponding to extension (1b) of J). Also, extension phone il+
Data "1" for identifying a specific extension (1) installed in the office of the hotel is set in the specific extension identification data area rID). In other words, "0" is set in the areas corresponding to the extension lines (1a), (1b), (1c)... installed in the hotel guest rooms, and the area corresponding to the circle line (1) installed in the hotel office. "1" is set in the area where the two are identified.

Next, as an example in which a call occurs to an extension telephone (1b) that is registered to reject calls, the extension telephone (1a) is
) will be described with reference to FIGS. 1 to 3. When extension telephone @ (1a) makes a call and dials the extension number of extension telephone (1b), which is blocked from receiving calls,
The dial numbers are counted by the central braking device (4), and the numbers are analyzed as shown in the flowchart in Figure 3.
A determination is made as to whether it is an extension call.

Next, the incoming Q system call data area (
Store data "0" in FJO) (initial clear). Next, check whether the incoming extension (1b) is free or not, and if it is busy, send the calling extension (1a) to the signal tone trunk (
8) and transmits the busy tone (busy tone connection processing).

In addition, if the incoming extension (1b) is free, the incoming call restriction data area of the main memory (5)
The determination is made based on the data of RJ). Therefore, since data "1" is included in the area corresponding to extension (1b), it is determined that incoming calls are restricted for extension (1b). Next, the data ``1'' is set in the incoming call barring area (BIC) of the calling extension (1 change), and the calling extension r1a) is connected to the signal tone trunk C 1st sound source trunk) (81) and the busy tone is 1-talk tone connection processing in which is sent).

On the other hand, a plug-shaped telephone with an extension line C1))
makes a call and dials extension number #i of the common telephone (1b) which is under 4-call restriction, the dialed digits are counted by central axis i (4+), and the numerical analysis shown in the low chart in Figure A3 is The extension call is not determined. Please check whether the main memory (1st word code in 51; store data "0" in the call data area (FIJC) and initial clear) and the monk's circle (1b) are worn, and then make a call. If the calling extension C1)) is connected to the signal tone trunk (81 fj2) and a busy tone is sent (busy tone connection processing). Main memory acquisition 1m f5+ (
Judgment is made based on the data in the fiduciary regulation data area (FIJ). Therefore, the area corresponding to extension C1b) has data “1
” is included, it is determined that extension r1b) is currently receiving calls.

Next, the incoming call restriction calling area [PJO] of the calling extension (1))
is set to data "1", and the calling extension (1)) is the data (rIJ) of the specific extension identification data area (ID).
It is identified as a specific extension and connected to the talkie trunk (second sound source trunk) (9), which says, ``Incoming calls are currently being restricted.''

A message J is sent. After hearing this message, the calling extension (1) knows that extension (1b) is barring incoming calls, so in order to cancel the barring,
Dial the incoming call restriction call special number C (eg r99J).

Extension C1)) dialed by this special number
Whether or not is a specific extension is determined based on the data in the specific extension identification data area (ID) in the main storage device (5) [Since the data of extension (1)) is "1", it is determined that it is a specific extension. ).

Next, the main memory (incoming call restriction call data area in 51)
FIJO) data is used to determine whether or not to cancel the incoming call restriction. If this data is "0" from a union//i specific extension C1)), the special number C, for example r? 9J)t? In this case, the data in the incoming call restriction call data area is set to "0" (initial clear), and the calling circle @1 (1)) is sent to the call 49f trunk (
81 (busy tone kkN processing). If this data is "1", set the data in the N standard call data area to "0". And inside &! (1b) via the communication path switch (3) (internal connection process). Therefore, it is a good idea to communicate urgent matters immediately and without any time constraints from a specific friend set up in the fourth office of a hotel while incoming calls are restricted.

Oh, the talk trunk (9;) includes an FkM (random access memory) that stores messages in the form of digital signals and a D/A i converter, but instead of messages, it outputs a busy tone and a signal. You may also use an oscillator that oscillates. However, only a talkie trunk (91 (second tone - trunk) (normal signal tone trunk (8) C first sound source trunk without using 1")) However, if it is recognized in advance that incoming calls are restricted on the specific extension side, the extension connection process can be performed by dialing the special number after hearing the busy tone, and there is no practical problem.

(g) As described in detail, according to the present invention, urgent matters can be immediately sent from a specific extension telephone to an extension telephone whose incoming calls are restricted.
Moreover, the call can be transmitted without any time loss, and the normal incoming call restriction can be maintained for calls from other extension telephones.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a hotel private branch exchange according to an embodiment of the present invention, FIG. 2 is a layout diagram showing the storage state of data in the main memory, and FIG. It is a flowchart showing the main part of the program. (1), (1a) to (1i)...extension telephone,
(21, (2a) to (21)...extension circuit, (3)
...Call path switch, (4)...Central control unit,
(5)...Main storage device, (81...Signal tone trunk (first sound source trunk), (9)...Talking trunk C second sound source trunk).

Claims (1)

[Claims] (1) A plurality of extension telephones, a call path switch connected to the extension telephones via an extension circuit, a central control device connected to the switch, and a specific extension identification data connected to the central control device. a main storage device having an area for storing incoming calls, an area for storing incoming call restriction data, and an area for storing data indicating calls to incoming call restricted extensions, and a sound source trunk connected to the call route switch, and for all extension telephones. Storing specific extension identification data, incoming call restriction data, and data indicating a call to the incoming restricted extension of the specific extension in a main storage device, and using the sound source trunk for a call of the specific extension to the incoming restricted extension. After connecting,
A private branch exchange characterized in that, based on a special number dialed from the specified extension, incoming call restriction is canceled under the control of the central control unit, and the specified extension is connected to the incoming call restricted extension via the call path switch.