JP3669478B2 - Pre-translation method by station number - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pre-translation method by station number, and in particular, in a telephone exchange, it is possible to determine the final incoming call number based on the outgoing telephone number from the subscriber, specify the contents of the telephone connection service, or restrict outgoing calls. It is related with the pretranslation system classified by station number.
[0002]
[Prior art]
In general, telephone communication is initiated when a telephone subscriber dials the telephone number of the other subscriber. Normally, when there is no error in the outgoing telephone number dialed by the subscriber, or when the telephone network is functioning normally, telephone communication can be performed without any limitation. However, when there is an error in the calling telephone number, it may be necessary to notify the calling subscriber that the calling is impossible. In addition, when a telephone call to a certain subscriber or area is inundated and the telephone network is oversaturated, it may be necessary to restrict outgoing calls from the subscriber. As one of methods for specifying the contents of the telephone connection service or restricting outgoing calls in this way, pre-translation in a telephone exchange can be cited.
[0003]
Pre-translation in the exchange sets whether the telephone number sent by the subscriber can be accepted, sets the maximum number of digits of the other party's telephone number, or whether the telephone number is a local area code or an area code Set the contents of the telephone connection service, etc., and when a call is made to the set telephone number, the final incoming call number is determined for the corresponding telephone number, and the telephone connection service is implemented, or This is to limit outgoing calls to the corresponding telephone number, and to determine the connection partner of the telephone number sent by the subscriber.
[0004]
[Problems to be solved by the invention]
The conventional pre-translation method described above determines service contents or restricts outgoing calls based on the telephone number of the other party that the subscriber sends, that is, the telephone number on the called side. Therefore, it has been impossible to change the service contents or restrict outgoing calls depending on the telephone number of the subscriber who transmits the telephone number or the area of the subscriber who transmits the telephone number.
[0005]
An object of the present invention is to provide a pre-translation method by station number that makes it possible to determine the final incoming call number based on the telephone number of the calling subscriber, identify the contents of the telephone connection service, or perform call restriction. There is to do.
[0006]
[Means for Solving the Problems]
The pre-translation method by station number of the present invention is applied to an exchange accommodating a plurality of subscriber telephones. Pre-translation method by station number, The exchange includes a dial receiving device for receiving a dial number from the subscriber telephone, and a subscriber control device for controlling the subscriber telephone, a dial number from the subscriber control device, and the dial number transmitted. Receiving the subscriber line number of the subscriber telephone, obtaining the subscriber telephone number of the subscriber telephone that originated the dialed number from the subscriber line number, identifying the station number of the subscriber telephone number; It acquires which of the category numbers the station number is set in advance, and the first few digits of the dial number match the dialed digits set in advance corresponding to the acquired category number If it does not match, it is determined that the dialed number is missing. If it is not a missing number, it is determined whether the dial number is a long distance call, a local call, a special number, or outgoing restrictions, and depending on the result of the determination, whether to connect to the dial number, The dial number includes a pre-translation unit that processes whether the dialed number is a missing number or is transmitted to the calling party.
[0007]
Also, The pre-translation unit receives a dial number from the subscriber control device and a subscriber line number of a subscriber telephone that has transmitted the dial number, and processes the call; and the subscriber line A subscriber data storage unit for acquiring the subscriber telephone number of the subscriber telephone that has transmitted the dialed number from the number, and station number data for acquiring which type number the station number of the subscriber telephone number corresponds to Whether the dial number is a missing number for each of the storage unit and the type number, or if it is not a missing number, whether the dial number is a long distance call, a local call or a special number, or is restricted from being transmitted, A data storage unit that stores data for determining It is characterized by that.
[0008]
further, The exchange further includes a data input unit that can arbitrarily rewrite the contents of the subscriber data storage unit, the station number data storage unit, and the data storage unit provided in the pretranslation unit. It is characterized by that.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0015]
FIG. 1 is a block diagram showing an embodiment of the pre-translation method by station number of the present invention.
[0016]
The present embodiment shown in FIG. 1 comprises a plurality of subscriber telephones 3, a switch 1 that accommodates the subscriber's telephone, and a plurality of subscriber lines 2 that connect the plurality of subscriber telephones 3 and the switch 1. Has been.
[0017]
The exchange 1 includes a subscriber control device 4 that controls a subscriber telephone, and a pretranslation unit 12 that performs pretranslation using data from the subscriber control device 4. The subscriber control device 4 includes a dial receiving device 5 that receives a call telephone number, that is, a dial number from a subscriber telephone, and the pretranslation unit 12 accepts data from the subscriber control device 4. A call processing unit 6 for processing the corresponding call, a subscriber data storage unit 7 referred to by the call processing unit 6, a station number data storage unit 8, and a pre-translation data storage unit 9. A pretranslation station number storage unit 10 and a pretranslation result storage unit 11 used by the processing unit 6 are provided. The exchange 1 also includes a data input unit 13 that can arbitrarily rewrite data in the subscriber data storage unit 7, the station number data storage unit 8 and the pretranslation data storage unit 9 of the pretranslation unit 12. It consists of
[0018]
Next, the configuration of the subscriber data storage unit 7 will be described with reference to FIG.
[0019]
FIG. 2 is a diagram illustrating a configuration example of the subscriber data storage unit.
[0020]
In FIG. 2, the subscriber data storage unit 7 includes a subscriber line number of a subscriber line connecting the subscriber telephone and the exchange, and a subscriber telephone number of the subscriber telephone connected to the corresponding subscriber line. It is composed of In the example of FIG. 2, the subscriber telephone number of “000001” is “03 (5877) XXX”, and the subscriber telephone number of “000002” is “042 (307) AAAA. ".
[0021]
Next, the configuration of the station number data storage unit 8 will be described with reference to FIG.
[0022]
FIG. 3 is a diagram illustrating a configuration example of the station number data storage unit.
[0023]
In FIG. 3, the station number data storage unit 8 is composed of a station number and a pre-translation type number corresponding to the station number. The station number is a number obtained by adding the area code and the local station number in the subscriber telephone number, and the station numbers of all the subscribers connected to the exchange are registered. In the example of FIG. 3, the subscribers connected to the exchange have the area code “03”, the city numbers “6791” and “5877”, and the area code. Is registered with "042" and a local station number of "307", and an area code of "0426" and a local station number of "97" It will be.
[0024]
Further, the pre-translation type number in FIG. 3 is a number indicating which type number in the pre-translation data storage unit 9 is referred to. In the example of FIG. 3, the station number “03 (6791)” The pre-translation type number is “1”, and the station number “042 (307)” indicates that the pre-translation type number is “2”.
[0025]
In the example of FIG. 3, the station number of a general public telephone network is given as an example. However, in the present invention, it is not necessarily limited to the station number of the public telephone network. For example, in a private branch exchange that exchanges telephones only within one company, a station number specially set only within the company can be freely set and registered in the station number data storage unit 8.
[0026]
Next, the configuration of the pretranslation data storage unit 9 will be described with reference to FIG.
[0027]
FIG. 4 is a diagram illustrating a configuration example of the pre-translation data storage unit.
[0028]
In FIG. 4, a pre-translation data storage unit 9 is a set of pre-translation data set for performing pre-translation. A pre-translation type number indicating a pre-translation type number and a subscriber Dial digits indicating the number of digits from the beginning of the dialed number and indicating the dial number that can be accepted by the exchange, the maximum number of digits of the dial number following the dial digits, and when the dial number is dialed It consists of service contents.
[0029]
In the example of FIG. 4, when pretranslation with the pretranslation type number “1” is performed, first, the dial numbers that can be accepted by the exchange are “03”, “0423”, “ 0426 ”,“ 697 ”,“ 587 ”,“ 11 ”, and“ 17 ”. The maximum number of digits after the dialed number “03” is 8 digits, and the service content when the dialed number “03” is dialed is “normal”, that is, a normal long distance call. Indicates service. In addition, the maximum number of digits of the dial number following the dialed number “697” is 5 digits, and the service content at this time indicates that “local call”, that is, local call is serviced. The maximum number of digits of the dial number following the dialed number “11” is one digit, and the service content at this time is “special number”, that is, an emergency call to the police or fire department. When the dialed number “17” is dialed, the service content indicates “restricted”, that is, the call restriction for the number “17 ·” is restricted.
[0030]
The subscriber data storage unit 7 shown in FIG. 2, the station number data storage unit 8 shown in FIG. 3, and the pre-translation data storage unit 9 shown in FIG. It is possible to rewrite to an arbitrary value from the unit 13.
[0031]
Next, the operation of the embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, 4, 5, and 6.
[0032]
FIG. 5 is a flowchart for explaining the operation of the present embodiment.
[0033]
In FIG. 5, the exchange 1 shown in FIG. 1 stands by in a state waiting for dialing from the subscriber telephone 3 (S1). When a call is made from the subscriber telephone 3, the dial receiving device 5 detects the dialed number sent (S 2), and the dialing number sent to the call processing unit 6 for processing the call and the calling subscriber The subscriber line number of the telephone is notified as data (S3). The call processing unit 6 obtains the subscriber telephone number transmitted with reference to the subscriber data storage unit 7 based on the notified subscriber line number (S4). Next, the station number of the subscriber telephone number transmitted with reference to the station number data storage unit 8 is extracted from the subscriber telephone number (S5), and the extracted station number is set in the pretranslation station number storage unit 10 (S6). Next, pre-translation is executed based on the station number in the pre-translation station number storage unit 10 (S7). The pre-translation operation, that is, the operation in step S7 will be described in detail later with reference to FIG. 6, but the pre-translation result is set in the pre-translation result storage unit 11. Therefore, the next operation is determined with reference to the pretranslation result storage unit 11 (S8).
[0034]
If the result of step S8 is "local call" (branch to "local call" of step S8), the dial number is not attached with the area code, so the subscriber who sent the dial number The area code of the subscriber telephone number is added to the dial number as a new dial number (S9), the station number of the new dial number is newly extracted with reference to the station number data storage unit 8 (S10), That is, the dialed station number of the called side is extracted, the extracted station number is reset in the pretranslation station number storage unit 10 (S11), and the process returns to step S7 to perform pretranslation again. The operations in steps S9 to S11 are performed to confirm that the telephone number (new dial number) obtained by adding the calling area code to the dialed dial number is not an error.
[0035]
If the result of step S8 is “normal” (branch to “normal” in step S8), a telephone is connected to the long-distance telephone number to service a normal long-distance call (S12), and the process is terminated. Return to step S1.
[0036]
If the result of step S8 is “special number” (branch to “special number” in step S8), the telephone is connected to a special number such as the police or fire department (S13), the process is terminated, and the process returns to step S1.
[0037]
If the result of step S8 is “restricted” (branch to “restricted” in step S8), the telephone number has been subjected to call restriction, so that the caller is notified of the call restriction. (S14), the process ends and the process returns to step S1.
[0038]
If the result of step S8 is “missing number” (branch to “missing number” in step S8), the dial number is a missing number, so the subscriber who transmitted the missing number is notified (S15), and the process ends. To return to step S1.
[0039]
Next, details of the pre-translation operation (details of the operation in step S7 in FIG. 5) will be described with reference to FIG.
[0040]
FIG. 6 is a flowchart for explaining the details of the pretranslation operation.
[0041]
In FIG. 6, the pre-translation starts by taking out the station number from the pre-translation station number storage unit 10 (S21). Next, the station number data storage unit 8 is referred to extract the pre-translation type number of the station number extracted in step S21 (S22). Based on the extracted pre-translation type number, pre-translation data is read from the pre-translation data storage unit 9 (S23). Next, the dial number is checked. First, it is checked whether or not the first few digits of the dial number are in the dialed number column of the pre-translation data (S24). If it is not in the dialed number column (not present in step S24), since the dial number is a missing number, "missing number" is set in the pretranslation result storage unit 11 (S25), and the process is terminated. If the first few digits of the dialed number are in the dialed number field (in step S24), then check whether the number of digits following the dialed number in the dialed number is within the maximum number of digits shown in the maximum number of digits field. (S26) If the number of digits is greater than or equal to the maximum number (at step S26 or more), the dial number is over the number of digits, so “missing number” is set in the pretranslation result storage unit 11 (S27), and the process is terminated. . If it is within the maximum number of digits (within step S26), the service content column on the same line as the line indicated by the dialed number of the dial number is checked (S28).
[0042]
If the service content field is “restricted” (branch to “restricted” in step S28), “restricted” is set in the pretranslation result storage unit 11 (S29), and the process is terminated.
[0043]
If the service content column is “special number” (branch to “special number” in step S28), “special number” is set in the pretranslation result storage unit 11 (S30), and the process is terminated.
[0044]
If the service content column is “local call” (branch to “local call” in step S28), “local call” is set in the pre-translation result storage unit 11 (S31), and the process ends. .
[0045]
If the service content column is other than the above (branch to “other than left” in step S28), “normal” is set in the pretranslation result storage unit 11 (S32), and the process is terminated.
[0046]
Next, a specific example of the pre-translation method for each station number according to the present invention will be described with reference to FIG. 7, FIG. 8, FIG. 9, and FIG.
[0047]
FIG. 7 is a diagram for explaining a specific example 1 of the present invention.
[0048]
FIG. 7 shows a specific example of an operation for telephone connection to a telephone having a telephone number of 03 (6791) ZZZ when dialing 6971ZZZ from a telephone having a subscriber telephone number of 03 (5877) XXXX on the calling side.
[0049]
In the processing column (1) in FIG. 7, the dialing number of the calling subscriber is “6791ZZZZ”. At this time, as shown in the processing step column, the exchange performs the operations in steps S1 and S2 in FIG. The reference data column indicates that there is no reference data in the exchange. In the processing step column, it is assumed that the operation of the exchange corresponding to all the processing columns in the following is shown by the steps of the flowchart shown in FIG. 5 or FIG.
[0050]
In (2) and (3) of FIG. 7, the exchange refers to the subscriber data storage unit 7 (FIG. 2) shown in the reference data column, and the calling subscriber's subscriber line number is “000001”. Recognize that the telephone number of the calling subscriber is 03 (5877) XXXX.
[0051]
Subsequently, in (4) and (5) of FIG. 7, the exchange refers to the station number data storage unit 8 (FIG. 3), extracts the station number 03 (5877) of the calling subscriber, and station number 03 (5877). It is recognized that the pre-translation type number is “1”.
[0052]
In the following (6), (7) and (8), the pretranslation data in the column of the pretranslation type number “1” in the pretranslation data storage unit 9 (FIG. 4) is read, and in the dial number column in (6). It is confirmed that the first three digits “697” of the dial number 6971ZZZ are present. In (7), it is confirmed that the number of digits following “697” is within 5 digits. In (8), the dialed number “697” is confirmed. Recognize that the service content column is “local call”.
[0053]
Since the service content is “local call”, the area code “03” of the calling subscriber is added in front of the dial number “6791ZZZZ” in (9), and a new dial number [036771ZZZZ] is added. obtain.
[0054]
(10) In (11), the station number data storage unit 8 (FIG. 3) is referred again to extract the station number “03 (6791)” of the new dial number and the pretranslation type number is “1”. Recognize that.
[0055]
(12) In (13) and (14), the pretranslation data in the field of the pretranslation type number “1” in the pretranslation data storage unit 9 (FIG. 4) is read. "03" is confirmed, the number of digits following "03" is confirmed to be within 8 digits in (13), and the first two digits of the new dialed number "03" in (14) It is recognized that the service content column of “Normal” is “Normal”.
[0056]
Finally, in (15), since it is recognized that the call is a “normal” long distance call, the telephone connection is made to the long distance telephone number “03 (6791) ZZZ”, and the processing is terminated.
[0057]
By performing the above operation, even if the initial dial number is “6791ZZZZ” and a number without an area code, it is possible to make a telephone connection to the number “03 (6791) ZZZ” to which the area code is added. It becomes possible.
[0058]
These operations are realized by providing a station number data storage unit indicating the station number of the subscriber accommodated in the exchange and starting the pretranslation based on the station number on the caller side when executing pretranslation. It becomes possible.
[0059]
FIG. 8 is a diagram for explaining a specific example 2 of the present invention.
[0060]
In FIG. 8, when dialing 697BBBB from the calling party's subscriber telephone number 042 (307) AAAA, the calling party's subscriber area code is placed before the 697BBBB telephone number or the dialed number. A specific example of an operation for determining that the telephone number 042 (697) BBBB attached is a missing number will be described.
[0061]
In the processing column (1) in FIG. 8, the dialing number of the calling subscriber is “697BBBB”. At this time, as shown in the processing step column, the exchange performs the operations of steps S1 and S2 in FIG. The reference data column indicates that there is no reference data in the exchange. In the processing step column, it is assumed that the operation of the exchange corresponding to all the processing columns in the following is shown by the steps of the flowchart shown in FIG. 5 or FIG.
[0062]
In (2) and (3) of FIG. 8, the exchange refers to the subscriber data storage unit 7 (FIG. 2) shown in the reference data column, and the calling subscriber's subscriber line number is “000002”. The telephone number of the calling subscriber is recognized as 042 (307) AAAA.
[0063]
Subsequently, in (4) and (5) of FIG. 8, the exchange refers to the station number data storage unit 8 (FIG. 3), extracts the station number 042 (307) of the calling subscriber, and station number 042 (307). It is recognized that the pre-translation type number is “2”.
[0064]
In the following (6), the pre-translation data in the pre-translation type number “2” column of the pre-translation data storage unit 9 (FIG. 4) is read, and the first digit “ Confirm that there is no "69 ...". That is, the dial number 697BBBB is recognized as a missing number in the pre-translation type number “2”.
[0065]
Since it was recognized that the number is missing, the missing number is processed in (7). Finally, in (8), the dial number “697BBBB” is transmitted to the calling party that the number is missing, and the processing is terminated. .
[0066]
The operation of FIG. 8 is provided with a station number data storage unit indicating a station number of a subscriber accommodated in the exchange when performing pre-translation, and a plurality of pre-translation types for each station number on the caller side. This can be realized by providing a number and setting a dialable dialing number in the pretranslation data storage unit according to the difference in the pretranslation type number.
[0067]
FIG. 9 is a diagram for explaining a specific example 3 of the present invention.
[0068]
FIG. 9 shows a specific example of the operation for telephone connection to the 110 telephone number when dialing 110 from the telephone of the calling party telephone number 03 (5877) XXX.
[0069]
In the processing column (1) in FIG. 9, the dialing number of the calling subscriber is “110”. At this time, as shown in the processing step column, the exchange performs the operations in steps S1 and S2 in FIG. The reference data column indicates that there is no reference data in the exchange. In the processing step column, it is assumed that the operation of the exchange corresponding to all the processing columns in the following is shown by the steps of the flowchart shown in FIG. 5 or FIG.
[0070]
In (2) and (3) of FIG. 9, the exchange refers to the subscriber data storage unit 7 (FIG. 2) shown in the reference data column, and the calling subscriber's subscriber line number is “000001”. Recognize that the telephone number of the calling subscriber is 03 (5877) XXXX.
[0071]
Subsequently, in (4) and (5) of FIG. 9, the exchange refers to the station number data storage unit 8 (FIG. 3), extracts the station number 03 (5877) of the calling subscriber, and station number 03 (5877). It is recognized that the pre-translation type number is “1”.
[0072]
In the following (6), (7) and (8), the pretranslation data in the column of the pretranslation type number “1” in the pretranslation data storage unit 9 (FIG. 4) is read, and in the dial number column in (6). It is confirmed that the first two digits “11” of the dial number 110 are present. In (7), it is confirmed that the number of digits following “11” is within one digit. In (8), the dial number “11” is confirmed. Recognize that the service content field of is “special number”.
[0073]
Since the service content is “special number”, the telephone connection is made to the special number “110” in (9), and the process ends.
[0074]
In the operation of FIG. 9, when performing the pre-translation, a plurality of pre-translation type numbers are provided, dial numbers that can be transmitted depending on the difference of the pre-translation type numbers are set in the pre-translation data storage unit, and This can be realized by setting “special number” in the service content column.
[0075]
In the case of the specific example 3 in FIG. 9, if the pretranslation type number is “2” or “3”, “11 ·” is set in the dialed number field of the pretranslation data storage unit. Therefore, the dial number “110” is determined to be a missing number.
[0076]
FIG. 10 is a diagram for explaining a specific example 4 of the present invention.
[0077]
In FIG. 10, when dialing 177 from the telephone number 03 (5877) XXXX on the calling side, since the telephone number of 177 is restricted, a specific example of an operation in which telephone connection is not made is shown. Show.
[0078]
The processing column (1) in FIG. 10 indicates that the dialing number of the calling subscriber is “177”. Since the subsequent operations from FIG. 10 (2) to FIG. 10 (5) are the same as those in FIG. 9, the description thereof is omitted.
[0079]
Subsequently, in (6), (7), and (8) of FIG. 10, the pretranslation data in the column of the pretranslation type number “1” in the pretranslation data storage unit 9 (FIG. 4) is read, and in (6), the dialing is performed. Confirm that the first two digits “17” of the dial number 177 are in the number field, confirm that the number of digits following “17” is within one digit in (7), and dial digits in (8). It is recognized that the service content column of “17” is “restricted”.
[0080]
Since the service content is “restricted”, the number “177” in (9) is transmitted to the subscriber who has made a call restriction, and the process ends.
[0081]
The operation of FIG. 10 is to perform pre-translation by providing a plurality of pre-translation type numbers, setting dial numbers that can be transmitted according to the difference in pre-translation type numbers in the pre-translation data storage unit, and This can be realized by setting “restriction” in the service content column.
[0082]
In the case of the specific example 4 in FIG. 10, if the pretranslation type number is “2” or “3”, “17 ·” is set in the dialed number field of the pretranslation data storage unit. Therefore, the dial number “177” is determined to be a missing number.
[0083]
【The invention's effect】
As described above, since the pre-translation method by station number according to the present invention can change the setting of the pre-translation type for each station number of the calling party's telephone number, the station number of the calling party's telephone number can be changed. Thus, it is possible to determine the final incoming call number and specify the contents of the telephone connection service, or to restrict outgoing calls by the station number on the outgoing side.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a pre-translation method by station number according to the present invention.
FIG. 2 is a diagram illustrating a configuration example of a subscriber data storage unit.
FIG. 3 is a diagram illustrating a configuration example of a station number data storage unit;
FIG. 4 is a diagram illustrating a configuration example of a pre-translation data storage unit.
FIG. 5 is a flowchart illustrating the operation of the present embodiment.
FIG. 6 is a flowchart illustrating details of a pretranslation operation.
FIG. 7 is a diagram for explaining a specific example 1 of the present invention.
FIG. 8 is a diagram for explaining a specific example 2 of the present invention.
FIG. 9 is a diagram for explaining a specific example 3 of the present invention.
FIG. 10 is a diagram for explaining a specific example 4 of the present invention.
[Explanation of symbols]
1 exchange
2 subscriber lines
3. Subscriber telephone
4. Subscriber control device
5 Dial receiver
6 Call processor
7 subscriber data storage
8 Station number data storage
9 Pre-translation data storage
10 Pre-translation station number storage
11 Pre-translation result storage
12 Pre-translation part
13 Data input section

Claims (3)

A station number by the pre-translation scheme definitive in exchange for accommodating a plurality of subscriber telephone, the exchange controls the subscriber telephone set comprises a dial receiving apparatus for receiving a dial number from the subscriber telephone set A subscriber control device, and a subscriber telephone that has received the dial number from the subscriber control device and the subscriber line number of the subscriber telephone that has transmitted the dial number, and has transmitted the dial number from the subscriber line number The subscriber telephone number is obtained, the station number of the subscriber telephone number is identified, the type number that the station number corresponds to is acquired, and the corresponding type number is obtained. If the first digit of the dialed number matches the dialed number set in advance, if it does not match, it is determined that the dialed number is a missing number. If ie not missing number, either the dialed number is transmitted or restricted is special service number or a local call or a long distance call, a determination is made, it is connected to the dialed number according to the result of determination Or a pre-translation unit for processing whether the dialed number is missing or transmitted to a subscriber who has made a call restriction. The pre-translation unit receives a dial number from the subscriber control device and a subscriber line number of a subscriber telephone that has transmitted the dial number, and processes the call; and the subscriber line A subscriber data storage unit for acquiring the subscriber telephone number of the subscriber telephone that has transmitted the dialed number from the number, and station number data for acquiring which type number the station number of the subscriber telephone number corresponds to Whether the dial number is a missing number for each of the storage unit and the type number, or if it is not a missing number, whether the dial number is a long distance call, a local call or a special number, or is restricted from being transmitted, The station number-specific pretranslation method according to claim 1 , further comprising: a data storage unit that stores data for performing the determination . The exchange further includes a data input unit that allows the subscriber data storage unit, the station number data storage unit, and the data storage unit included in the pretranslation unit to be arbitrarily rewritten. The pre-translation method by station number according to claim 2 .

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