JP2003199132A - Private exchange system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a private exchange system with excellent convenience capable of optionally selecting informed caller number information in the case of making a call to a public network. <P>SOLUTION: This private exchange system is composed of extension telephone information 12 stored in advance in a storage device 8, system setting information 13, information 15 for a plurality of caller numbers, and a condition setting means 14, a selection means 16, and a caller number transmission means 17 which are provided in a central controller 7. The selection means 16 selects information for the number of the caller on the basis of a condition set by the condition setting means 14 and the caller number transmission means 17 transmits the selected caller number information as a caller number. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange system for notifying caller number information when dialing a station line from a plurality of extension telephones connected to a private branch exchange,
Particularly, the present invention relates to a private branch exchange system capable of notifying arbitrary caller number information regardless of the connected office line.

[0002]

2. Description of the Related Art In a conventional private branch exchange system, in a private branch exchange accommodating a plurality of office lines and extension telephones, when the extension telephone connected to the private branch exchange makes a call to a public network, the extension telephone performs a calling operation. It is known that the caller number information of the selected office line is notified to the called party when the call is made.

[0003]

In the conventional private branch exchange system, the caller ID information notified to the called party changes depending on the office line selected when making a call from the extension telephone, and the private branch exchange is used. Has a problem that a certain number of caller ID information is not notified to the subscriber telephone set on the called side.

Also, when the extension telephone makes a call operation to a station line, the caller number information determined by the selected station line is notified, and it is desired to notify the caller number information by a specific dial operation. There is a problem that you can not do it even if you think.

Furthermore, when an extension telephone set belonging to a predetermined group makes a call operation to a station line, the caller number information determined by the selected station line is notified, and the group is given specific caller number information. There is a problem that you cannot do it even if you want to notify it.

[0006] Further, there is a situation in which it is not possible to deal with a request for notifying specific caller number information according to the date and time.

The present invention has been made in order to solve such a problem, and its purpose is to provide a highly convenient private branch exchange system capable of arbitrarily selecting caller number information notified when a call is made to a public network. To provide.

[0008]

To solve the above problems, a private branch exchange system according to the present invention is a private branch exchange system having a plurality of extension telephones and a private branch exchange accommodating at least one or more office lines. Condition setting means for determining a selection condition from extension telephone information and system setting information stored inside the exchange, and selecting means for selecting one caller number information from a plurality of caller number information based on the condition setting means, And a sender number transmitting means for sending the sender number information selected by the selecting means to the office line.

The private branch exchange system according to the present invention comprises a condition setting means for determining a selection condition from extension telephone information and system setting information stored inside the private branch exchange, and a plurality of caller number information based on the condition setting means. Since the selection means for selecting one piece of caller number information and the caller number transmission means for sending the caller number information selected by the selection means to the office line are selected, it is selected when making a call from the extension telephone. The caller ID information notified to the called party does not change depending on the station line, and when the private branch exchange is used, a certain number of calling party information is notified to the called party as in the case of the subscriber telephone set. Therefore, it is possible to improve convenience.

Further, the extension telephone information and the system setting information according to the present invention are information corresponding to when the extension telephone performs a dialing operation to the office line by a specific dial operation.

Further, the extension telephone information and the system setting information according to the present invention are information corresponding to the extension telephones belonging to a predetermined group when making a call operation to a station line.

Further, the extension telephone information and the system setting information according to the present invention are information corresponding to the date and time when the extension telephone makes a call operation to the office line.

As for the extension telephone information and the system setting information according to the present invention, the extension telephone transmits a specific number (special number) to a station line, and the extension telephones belonging to a predetermined group perform a transmission operation to the station line. Or, by performing a dialing operation for the date and time, it is the caller number information corresponding to the special number, the predetermined group, or the date and time.Therefore, certain caller number information corresponding to the special number, the predetermined group, or the date and time is sent to the central line. In addition, regardless of the office line to which the extension telephone is connected, a certain number of caller number information can be notified to the receiving side, and convenience can be improved.

Further, the extension telephone information and the system setting information according to the present invention correspond to the case where an extension telephone housed in another private branch exchange connected to the private branch exchange by a private line network makes a call operation to a central office line. It is the information to be provided.

The extension telephone information and the system setting information according to the present invention correspond to information when an extension telephone housed in another private branch exchange connected to the private branch exchange by a private line network makes a call operation to a station line. Therefore, even when making an outgoing call from an extension telephone that is housed in another private branch exchange connected by a private line network, the call is sent to the receiving side in the same way as when making an outgoing call from the extension telephone of the private branch exchange that houses the central office line. It is possible to notify a certain number of caller number information, and it is possible to improve convenience and expand the system.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that, in the present invention, when the extension telephone housed in the private branch exchange dials to the office line, the caller number is notified to the receiving side regardless of the office line to which the extension telephone is connected. The present invention relates to a private branch exchange system that can select and notify a number.

FIG. 1 is a block diagram of an embodiment of a private branch exchange system according to the present invention. In FIG. 1, a private branch exchange system 1 includes a private branch exchange 2 and an extension telephone 3 accommodated in the private branch exchange 2, and is connected to a subscriber telephone 5 via a public network 4.

The private branch exchange 2 comprises a speech path switch 6, a central control unit 7, a storage unit 8, a control bus 9, a line trunk 10 and an office line trunk 11, and the control bus 9 is a speech path. The switch 6, the central control device 7, and the storage device 8 are connected.

The central control unit 7 is a control unit which is basically composed of a microprocessor and is provided with condition setting means, selecting means and caller number transmitting means, and controls the entire private branch exchange 2 via the control bus 9. Yes, various programs are executed under each condition.

The storage device 8 is composed of a memory such as a RAM and is connected to the central control device 7 via a control bus 9. The central control device 7 is instructed by the central control device 7.
And exchanges data with each other, stores various programs such as an exchange operation control program and various data such as extension data, station data and control data of the private branch exchange 2, that is, system setting information, and is used when executing the exchange operation. Stored information such as extension telephone information.

The speech path switch 6 is connected to the central control unit 7 via the control bus 9, and connects or disconnects the speech path according to an instruction from the central control unit 7.

The line trunk 10 is a connection unit for connecting the extension telephone 3 to the private branch exchange 2. The line trunk 10 has a control device (not shown) built therein. The line trunk 10 notifies the central control unit 7 of various information such as call information, dial information and disconnection information of the extension telephone set 3, and also lamp information and display information for controlling the extension telephone set 3 from the central control unit 7. (LCD
By notifying the control device in the line trunk 10 with various information such as display information), ringing information, and incoming call information,
The control for the extension telephone 3 is executed.

The office line trunk 11 is a connection unit for connecting the public network 4 to the private branch exchange 2, and the inside of the office line trunk 11 contains a control device (not shown).
The office line trunk 11 notifies the central control unit 7 of various information such as incoming call information from the public network 4 and caller number information, and calls information from the central control unit 7 to the public network 4 and dial information. By calling various information to the control device in the office line trunk 11, a call (or call) to the public network 4 is executed.

In the embodiment of the present invention, the office line trunk 11 is connected to the ISDN primary group interface (2B + D).
The public network 4 will be described as an ISDN network, but a private line network (for example, a digital leased line network, a common line network using a common line signaling system, etc.) can be used if caller number notification is possible. May be. Further, in the embodiment of the present invention, the office line trunk 11 is described as a single structure, but the speech path switch 6 of the private branch exchange 2 can accommodate a plurality of office line trunks 11.

The extension telephone 3 is an extension terminal connected to the private branch exchange 2, is connected to the line trunk 10, and performs various communication controls by the control device in the line trunk 10. The extension telephone 3 may be a multifunction telephone or a general telephone. Further, in the embodiment of the present invention, the extension telephone 3 is described as a single configuration, but a plurality of line trunks 10 are connected to the speech path switch 6 of the private branch exchange 2.
It is possible to accommodate a plurality of extension telephones 3 in the line trunk 10.

FIG. 2 is a sequence diagram of an embodiment of a call processing operation in the private branch exchange system according to the present invention. In the present embodiment, the transmission / reception of data to / from the communication path switch 6 and the storage device 8 is not the main part of the operation sequence, and thus the description thereof is omitted.

In step S1 of FIG. 2, when the extension telephone set 3 is off-hooked, the line trunk 10 detects the off-hook information. In step S2, when the line trunk 10 (control device (not shown)) detects the off-hook information, it sends call information to the central control device 7. In the following description, description of the control device not shown is omitted.

In step S3, when the central control unit 7 receives the calling information, it instructs the line trunk 10 which has transmitted the calling information to send out DT (dial tone). In step S4, the line trunk 10 sends the DT to the extension telephone 3 when receiving the DT sending instruction.

At step S5, the extension telephone 3
Has been transmitted, the calling special number is transmitted to the line trunk 10 when the user performs a specific dial operation. In step S6, the line trunk 10 sends the received dial information (transmission special number) to the central controller 7.

In step S7, when the central control device 7 receives the dial information from the line trunk 10 and recognizes that it is a special access code, it makes a call reservation for the station line trunk 11 and can capture the station line. It will be in a state. At this time, the supplement of the local line is not actually performed.

When the call reservation for the office line trunk 11 is completed in step S8, the central control unit 7 instructs the line trunk 10 to carry out a pseudo DT (second dial tone).
To send the. In step S9, when the line trunk 10 receives the pseudo DT transmission instruction from the central control unit 7, the line trunk 10 transmits the pseudo DT to the extension telephone 3 so that the user of the extension telephone 3 can complement the public network. Remind me.

In step S10, when the user of the extension telephone 3 hears the pseudo DT, the user dials the number of the other party. In step S11, when the line trunk 10 receives the partner number dial from the extension telephone 3, the line trunk 10 sends the received partner number dial to the central controller 7 as partner number information.

In step S12, the central controller 7
Based on the extension telephone information and the system setting information stored in the storage device 8, the caller number information satisfying the condition is selected. The caller number information selection process will be described later.

In step S13, the caller number and the other party's number are sent to the office line trunk 11 reserved for call origination in step S7.

In step S14, the office line trunk 11 (control device (not shown)) performs call setting transmission to the public network 4 using the received caller number and partner number as call setting information,
It becomes a call. In step S15, the public network 4 which has received the call setting transmission transmits the incoming call information including the caller number to the subscriber telephone 5 corresponding to the partner number.

FIG. 3 is a block diagram of the essential parts of one embodiment of the sender number information selection processing according to the present invention. In FIG. 3, the extension telephone information 12 is information stored in the storage device 8 in advance, and the calling information received by the central control device 7 in step S2 of FIG. 2 and the central control device 7 in step S6 of FIG. The received dial information (call special number) and the caller number sending condition for each extension telephone 3 are included. The system setting information 13 is information stored in advance in the storage device 8 and includes date and time management information, sender special number information, and sender number information.

The condition setting means 14 is realized by the central control unit 7 executing a corresponding program stored in the storage unit 8 and, based on the contents of the extension telephone information 12 and the system setting information 13, makes a plurality of calls. Person number information 15
Set conditions for selecting one caller ID information from.

The selecting means 16 is realized by the central control unit 7 executing a corresponding program stored in the storage device 8, and based on the conditions set by the condition setting means 14, a plurality of caller number information. Select one caller number information from 15.

The sender number sending means 17 is realized by the central controller 7 executing a corresponding program stored in the storage device 8, and one sender number information selected by the selecting means 16 is In step S13 of FIG. 2, the caller number is transmitted.

As described above, in the private branch exchange system 1 according to the present invention, the condition setting means 14 and the condition setting means 14 that determine the selection conditions from the extension telephone information 12 and the system setting information 13 stored inside the private branch exchange 2. Selection means 16 for selecting one piece of caller number information from a plurality of pieces of caller number information 15 based on the above, and caller number transmission means 17 for sending the caller number information selected by the selection means 16 to a central line. As a result, the caller ID information notified to the called party does not change depending on the office line selected when making a call from the extension telephone 3, and even when the private branch exchange 2 is used, Similar to the case, a certain number of caller number information can be notified to the called side, and the convenience can be improved.

FIG. 4 is a data structure diagram of an embodiment of the storage device according to the present invention. In FIG. 4, the extension telephone set management table 20 corresponds to the extension telephone set 3 and comprises extension number 21, dial information 22, partner number information 23, caller number sending condition 24, and caller number information pointer 25 as one block. However, the required number of this block shall be included. There are other data in one block,
Data not relevant to the present invention are omitted. The extension telephone management table 20 is included in the extension telephone information 12 existing in the storage device 8.

The extension number 21 is number information given to each extension telephone 3, and is used as a keyword when searching this data. The dial information 22 stores the dial information received by the central control unit 7 in step S6, that is, the dial special number dialed by the extension telephone 3. The other party number information 23 stores the other party number received by the central controller 7 in step 11, that is, the other party number dialed by the extension telephone set 3.

As the caller number sending condition 24, the condition for sending the caller number set in advance for each extension telephone 3 is stored, and the caller special number management table 30 is set prior to sending the caller number in step 13. Is referred to, the date / time management table 40, or the extension telephone management table 20 is determined in the caller number information selection processing in step S12. Caller ID information pointer 25
Indicates the caller number information 53 set in advance for each extension telephone 3.

The transmission special number management table 30 comprises a transmission special number 31, a dial type 32, and a caller number information pointer 33 as one block for each transmission special number, and includes a required number of these blocks. Transmission special number management table 30
Is included in the system setting information 13 existing in the storage device 8.

In the transmission special number 31, a preset transmission special number is stored. When the calling number sending condition 24 refers to the calling special number management table 30, it is determined whether or not the dial information 22 and the calling special number 31 match.

The dial type 32 stores information for supplementing the office line trunk 11 when a call is made to the public network 4. Caller ID information pointer 33
Indicates caller number information 51 that is sent when the dial information 22 and the call special number 31 match.

The date and time management table 40 includes date and time information 41,
It is assumed that the sender number information pointer 42 is configured as one block and that this block is included in the required number. The date / time management table 40 is included in the system setting information 13 existing in the storage device 8.

In the date / time information 41, preset date / time information is stored. When the sender number sending condition 24 refers to the date / time management table 40, it is determined whether or not the date / time for which step S12 is processed and the date / time information 41 match or have passed. The date and time here is
Information such as days of the week and holidays may be used. The caller number information pointer 42 points to the caller number information 52 for sending the caller number based on the above-mentioned determination result.

In the above description, the transmission special number management table 3
Although the number 0 and the date / time management table 40 are respectively set, a plurality of sets of the calling special number management table 30 and the date / time management table 40 can be provided by increasing the content of the caller number sending condition 24. Further, it is possible to provide a table having a partner number or a part thereof as a keyword without being limited to the special calling number and the date and time, and select the sender number information based on this keyword. That is, it is possible to provide a management table using information contained in the extension telephone information 12 and the system setting information 13 as keywords.

The sender number information management table 50 is composed of sender number information 51, 52 and 53. Here, the number of caller number information is 3, but it is possible to include one or more caller number information. The sender number information management table 50 is included in the system setting information 13 existing in the storage device 8.

The sender number information 51, 52, 53 is the sender number information to be sent to the public network 4, for example, 03-
It is dial number information such as 1234-5678. The caller number information pointers 33, 42 and 25 are configured to point to caller number notification information 51, 52 and 53, respectively. With this configuration, for example, when a plurality of extension telephones 3 are operated in a group and the extension telephones 3 of the same group make a call and the same caller number information is transmitted, the contents of the caller number information pointer are the same. By doing so, the sender number information is only one, and the memory can be effectively used.

Next, the caller number information selection process of step S12 shown in FIG. 2 will be described with reference to FIG. FIG. 5 is an operation flow chart of an embodiment of the caller number information selection processing according to the present invention. In FIG. 5, step S2
In step 1, the caller number sending condition 24, which is preset for each extension telephone 3, is extracted.

In step S22, it is determined whether the caller number sending condition 24 is a calling special number, is compatible with an extension telephone, or is date and time. If the determination result is the calling special number, the calling special number management table 30 is accessed in step S23.

In step S24, it is determined whether or not the dial information 22 and the calling special number 31 match, and the calling special number 31 is determined.
Is registered, and if it is registered,
Control goes to step S25. On the other hand, if the calling special number 31 is not registered, the process proceeds to step 28. A detailed flow chart of step S24 is shown in FIG. 6, and the description will be given later.

In step S25, the caller number information 51 in the caller number information management table 50 pointed by the caller number information pointer 33 is accessed. In step S26, the content of the sender number information 51 is read.

In step S27, the read caller number information is determined for sending the caller number in step 13.

On the other hand, if the calling special number 31 is not registered in step S24, the calling party number information is set to be absent in step S28.

In step S29, the extension telephone management table 20 is accessed. In step S30, it is determined whether or not the caller number information pointer 25 is set. If it is set, the process proceeds to step S31, and if it is not set, the process proceeds to step S28.

In step S31, the sender number information 53 in the sender number information management table 50 pointed by the sender number information pointer 25 is accessed. In step S32, the content of the sender number information 53 is read out, and in step S32
Move to 27.

In step S33, the date / time management table 40
To access. In step S34, step S12
It is determined whether or not the date and time when processing is performed and the date and time information 41 match, it is determined whether or not the date and time information 41 is registered, and if registered, the process proceeds to step S35 and is not registered. In that case, the process proceeds to step S28. Step S3
A detailed flow chart of No. 4 is shown in FIG. 7, and the description will be given later.

In step S35, the caller number information 52 in the caller number information management table 50 pointed by the caller number information pointer 42 is accessed. In step S36, the contents of the sender number information 52 are read out, and then in step S36.
Move to 27.

Next, a detailed flow chart of step S24 shown in FIG. 5 will be described. FIG. 6 is an operation flow chart of an embodiment of the calling special number process according to the present invention. 6, in step S41, it is determined whether or not the dial information 22 and the calling special number 31 match. If they match, it is determined in step S24 that there is registration.

On the other hand, when the dial information 22 and the outgoing special number 31 do not match, it is determined in step S42 whether or not the block in the outgoing special number management table 30 currently being accessed is the last block. This is recognized, for example, by writing a special code instead of the transmission special number in the last block.

In step S43, the access position of the currently accessed block in the outgoing special number management table 30 is moved to the next block, and step S41 is repeated.

Next, a detailed flow chart of step S34 shown in FIG. 5 will be described. FIG. 7 is an operation flow chart of an embodiment of the date and time processing according to the present invention. In FIG. 7, in step S44, processing date and time and date and time information 4
It is determined whether or not 1 matches. If they match, it is determined in step S34 that there is registration. Here, the case where they match has been described, but in some cases, it is determined whether or not they have passed. Also, although the explanation has been given based on the date and time, information on days of the week and holidays may be used.

On the other hand, when the date and time do not match the date and time information 41, it is determined in step S45 whether or not the block currently accessed in the date and time management table 40 is the last block. This is recognized, for example, by writing a special code instead of the date and time information in the last block.

In step S46, the access position of the block currently accessed in the date / time management table 40 is moved to the next block, and step S44 is repeated.

FIG. 8 is a data structure diagram of a call setting message transmitted to the public network 4 according to the present invention. The call setting message 60 shown in FIG. 8 is “3” described in the technical information “INS Net Service Interface Third Volume (Layer 3 Circuit Switching) Fifth Edition” disclosed by East Japan Telegraph and Telephone Corporation (NTT East). 1.1.1.4 Call setup (S
ETUP) ”message, a detailed description thereof will be omitted. However, the calling number shown as 61 is used as the calling number information. If this calling number is not set, the subscriber number is automatically set on the public network 4 side. And is sent to the other party's subscriber's telephone set 5.

Therefore, the caller number information determined in step S27 of FIG. 5 is set for the calling number 61, and the call setting message 60 is sent in the call setting sending of step S14 shown in FIG.

As described above, in the extension telephone information 12 and the system setting information 13 according to the present invention, the extension telephone 3 makes a transmission operation of a specific number (special number) to a station line, and the extension telephones belonging to a predetermined group are stationed. By performing a call operation on a line or a call operation on a date and time, the caller ID information corresponds to a special number, a predetermined group, or a date and time. The caller number information is transmitted, and a certain number of caller number information can be notified to the receiving side regardless of the office line to which the extension telephone is connected, and the convenience can be improved.

As a result, for example, the work efficiency of the call center and the like can be improved and the convenience can be improved.
Further, even when one private branch exchange system is divided into tenants and used by a plurality of companies, extension telephones of the same tenant can notify the same caller number. further,
It is possible to notify the caller number information according to the date and time, the day of the week, etc., so that it is possible to improve work efficiency and convenience.

FIG. 9 is a block diagram of an embodiment of a private branch exchange system connected by a leased line network according to the present invention. In FIG. 9, the private branch exchange 2a includes a communication path switch 6a,
The central control unit 7a, the storage unit 8a, the control bus 9a, the line trunk 10a, the office line trunk 11a, and the dedicated line trunk 18a are provided.
a, the central controller 7a and the storage device 8a are connected.
The office line trunk 11a is connected to the subscriber telephone set 5 via the public network 4. Further, the line trunk 10a connects the extension telephone 3a.

The private branch exchange 2b includes a communication path switch 6b,
A central control unit 7b, a storage unit 8b, a control bus 9b, a line trunk 10b, and a dedicated line trunk 18a are provided, and the control bus 9b connects the speech path switch 6b, the central control unit 7b, and the storage unit 8b. Also, line trunk 1
0b connects the extension telephone 3b.

The private branch exchange 2a and the private branch exchange 2b are connected by the private line network 19, but the private branch exchange 2b is not connected to the public network 4. In the case of such a configuration, when the extension telephone 3b of the private branch exchange 2b makes a call to the public network 4, the station line trunk 11a of the private branch exchange 2a is supplemented via the private line network 19 and the call is made to the public network 4. It is a so-called private line connection that is a so-called private line network-public network connection.

When a call is made from the extension telephone 3b of the private branch exchange 2b in such a state of private connection, since the extension telephone 3b is not the extension of the private branch exchange 2a, the caller number information is usually notified for each extension number. I can't.

The extension telephone 3b of the private branch exchange 2b complements the private line trunk 18b and then complements the private line trunk 18a of the private branch exchange 2a to establish a private line network connection state.

Next, the extension telephone 3b of the private branch exchange 2b.
Is capable of transmitting the caller number information for each of the above-mentioned special calling numbers by dialing the special number for calling the trunk line of the private branch exchange 2a and dialing the partner telephone number.

Further, the extension numbers of the extension terminals of the private branch exchange 2a and the private branch exchange 2b are all different numbers, and a private line is similarly sent from the extension telephone 3b of the private branch exchange 2b to supplement the private line network of the private branch exchange 2a. Private line trunk 18a
It is also possible to use the information channel between the private line trunk 18b and the private line trunk 18b to transmit the information of the extension telephone 3b of the private branch exchange 2b and notify the caller number information for each extension.

As described above, the extension telephone information 12 and the system setting information 13 according to the present invention are the private branch exchange 2a.
Since the extension telephone 3b housed in the other private branch exchange 2b connected to the private line network 19 makes a call to the central office line, the information corresponds to the other private branch network 19 connected to the private line network 19. Even when making an outgoing call operation from the extension telephone 3b accommodated in the exchange 2b, similar to the operation of making a call from the extension telephone 3a of the private branch exchange 2a in which the central office is accommodated, a certain caller number information is notified to the called side. Therefore, it is possible to improve convenience and expand the system.

[0080]

As described above, the private branch exchange system according to the present invention according to the present invention includes a condition setting means for determining a selection condition from the extension telephone information and the system setting information stored inside the private branch exchange, and the condition. A selecting means for selecting one calling number information from a plurality of calling number information based on the setting means, and a calling number transmitting means for sending the calling number information selected by the selecting means to the central office line. Therefore, the caller ID information notified to the called party does not change depending on the office line selected when making a call from the extension telephone, and when using the private branch exchange, the same as with the subscriber telephone. In addition, it is possible to notify the called party of a certain number of caller number information, and it is possible to improve convenience.

Further, with respect to the extension telephone information and the system setting information according to the present invention, the extension telephone makes a transmission operation of a specific number (special number) to the office line, and the extension telephones belonging to a predetermined group make a transmission to the office line. By performing an operation or making a call operation for the date and time, it is the caller number information corresponding to the special number, the predetermined group, or the date and time. Regardless of the office line to which the extension telephone is connected, a certain number of caller number information can be notified to the receiving side, and convenience can be improved.

Further, the extension telephone information and the system setting information according to the present invention are used when the extension telephones accommodated in the other private branch exchanges connected to the private branch exchange by the private network make a call to the central office line. This is the information to be received, so even when making an outgoing call from an extension telephone that is housed in another private branch exchange connected by a private line network, a call is received in the same manner as when making an outgoing call from an extension telephone of the private branch exchange that houses the central office line. The caller can be notified of certain caller ID information, and convenience can be improved and the system can be expanded.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a private branch exchange system according to the present invention.

FIG. 2 is a sequence diagram of an embodiment of a call processing operation in the private branch exchange system according to the present invention.

FIG. 3 is a block diagram of the essential parts of one embodiment of a sender number information selection process according to the present invention.

FIG. 4 is a data structure diagram of an embodiment of a storage device according to the present invention.

FIG. 5 is an operation flow chart of an embodiment of caller number information selection processing according to the present invention.

FIG. 6 is an operation flow chart of an embodiment of a calling special number process according to the present invention.

FIG. 7 is an operation flowchart of one embodiment of date / time processing according to the present invention.

FIG. 8 is a data structure diagram of a call setup message transmitted to the public network 4 according to the present invention.

FIG. 9 is a configuration diagram of an embodiment of a private branch exchange system connected by a leased line network according to the present invention.

[Explanation of symbols]

1 Private branch exchange system 2,2a, 2b Private branch exchange 3,3a, 3b Extension telephone 4 public network 5 subscriber telephones 6 Call path switch 7 Central control unit 8 storage devices 9 control bus 10 line trunk 11 station trunk 12 Extension phone information 13 System setting information 14 Condition setting means 15 Caller ID information 16 means of selection 17 Caller ID sending means 18a, 18b Private line trunk 19 leased line network 20 Extension telephone management table 30 outgoing special number management table 40 Date and time management table 50 Caller ID information table 60 Call setup message

Continued front page    F term (reference) 5K024 AA71 DD05 GG01 HH03                 5K049 BB02 BB04 CC11 EE11 FF32                       FF46

Claims (5)

[Claims] 1. In a private branch exchange system having a plurality of extension telephones and a private branch exchange accommodating at least one or more office lines, selection conditions are selected from extension telephone information and system setting information stored inside the private branch exchange. Setting means for determining the caller number, selecting means for selecting one caller number information from a plurality of caller number information based on the condition setting means, and the caller number information selected by the selecting means for the central office line. A private branch exchange system, comprising: a caller ID transmitting means for transmitting by sending. 2. The extension telephone information and the system setting information are information corresponding to when the extension telephone performs a dialing operation to the office line by a specific dial operation. Private exchange system as described. 3. The extension telephone information and the system setting information are information corresponding to when the extension telephones belonging to a predetermined group make a call operation to the central office line. Private exchange system as described. 4. The private branch exchange according to claim 1, wherein the extension telephone information and the system setting information are information corresponding to a date and time when the extension telephone makes a call operation to the office line. system. 5. The extension telephone information and the system setting information correspond when an extension telephone housed in another private branch exchange connected to the private branch exchange by a private line network makes a call operation to the central office line. The private branch exchange system according to claim 1, wherein the private exchange system is information to be provided.