GB2303276A - Office line incomming call service method - Google Patents
Office line incomming call service method Download PDFInfo
- Publication number
- GB2303276A GB2303276A GB9614308A GB9614308A GB2303276A GB 2303276 A GB2303276 A GB 2303276A GB 9614308 A GB9614308 A GB 9614308A GB 9614308 A GB9614308 A GB 9614308A GB 2303276 A GB2303276 A GB 2303276A
- Authority
- GB
- United Kingdom
- Prior art keywords
- extension
- office line
- function
- key data
- received
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/663—Preventing unauthorised calls to a telephone set
- H04M1/665—Preventing unauthorised calls to a telephone set by checking the validity of a code
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/50—Centralised arrangements for answering calls; Centralised arrangements for recording messages for absent or busy subscribers ; Centralised arrangements for recording messages
- H04M3/53—Centralised arrangements for recording incoming messages, i.e. mailbox systems
- H04M3/533—Voice mail systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/54—Arrangements for diverting calls for one subscriber to another predetermined subscriber
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
In an operational method of an exchange when an incoming office line call is received, an extension number, password and key data are received via the office line. The extension number and password are checked and, only if they are identical to previously stored information, are the following steps performed. If the key data represents character information, the key data are converted into character data using a character conversion table and transmitted to the extension corresponding to the received extension number. In a further aspect, if the key data represents function information, a corresponding function of the extension corresponding to the said extension number is set. Examples of this are external call forwarding code, remote paging code, and information message transmitting code during user's absence.
Description
OFFICE LINE INCOMING CALL SERVICE METHOD
The present invention relates to an operational method of an exchange, and more particularly to a method of executing an office line incoming call service.
Background to the Invention
Alongside the development of a variety of functions in communication equipment, exchanges capable of performing a variety of additional functions have been required.
Specifically, the exchange receives and stores a dual tone multi-frequency ("DTMF") signal from an office line subscriber in a remote location, during communication. One reference to this technique is to be found in Korean patent publication no. 94-8337. In this example, during a conversation with another subscriber, a subscriber may request the input of the telephone number of the other subscriber, and when the other subscriber generates the requisite DTMF signal, a DTMF decoder within in the subscriber's telephone converts the DTMF signal into digital data. Then, a central processing unit stores the digitally-converted information in a memory. It will therefore be appreciated that the telephone is capable of automatically storing the telephone number entered by another subscriber, during communication with that other subscriber.
Another reference to such a technique is to be found in
Korean patent publication no. 94-8339. In this example, an automatic telephone answering system stores a telephone number of a calling party during a user's absence. The automatic telephone answering system informs the calling party that the called party is out and outputs a guide message requesting the input of the telephone number of the calling party. Thus, the telephone number is stored and displayed. When the user returns home and picks up the message, the telephone numbers stored during his absence can be checked.
However, the above only store and display telephone numbers received from external telephones, but cannot inform the called party as to the message which the calling party desires to give him and further cannot redirect to the called party's current location the incoming calls to his or her telephone.
In the above functions, when the user is outside and generates an office line call, an incoming call side receives the call and processes a corresponding function.
For the incoming call service, there have been developed office line incoming call service functions for specific subscribers. This is known as a DISA (direct inward system access) function. In the DISA function, an exchange automatically answers an office line incoming call to a predetermined telephone number and adopts a procedure of checking an identification code, thus determining whether the exchange may be used. When the DISA office line incoming call is generated, an exchange recognizes the DISA function and analyses received data. Then, the exchange provides a call to a corresponding extension subscriber or dials the received telephone number to provide a call to another office line subscriber.
Other additional functions of the exchange can be embodied using the DISA function. In other words, a remotely located user can input his or her own information or establish a specific function.
It is an object of the present invention to provide an improved specific office line incoming call service method.
Summary of the Invention
To accomplish this object of the present invention, there is provided an operational method of an exchange comprising:
a. when an incoming office line call is received, receiving an extension number and key data via the office line;
b. if the key data represents character information, converting the key data into character data using a character conversion table and transmitting the character data to the extension corresponding to the said extension number.
The method may further comprise:
displaying the character data on a display of the corresponding extension telephone.
The present invention also provides an operational method of an exchange comprising:
a. when an incoming office line call is received, receiving an extension number and key data via the office line;
b. if the key data represents function information, setting a corresponding function of the extension corresponding to the said extension number.
The two methods may be combined to provide an operational method of an exchange comprising:
a. when an incoming office line call is received, receiving an extension number and key data via the office line;
b. if the key data represents character information, converting the key data into character data using a character conversion table and transmitting the character data to the extension corresponding to the said extension number; and
c. if the key data represents function information, setting a corresponding function of the extension corresponding to the said extension number.
The said corresponding function may be accessed from a function table.
For example, if the received key data represents an external call forwarding code, the method may include:
receiving a telephone number via the office line and setting an external call forwarding function of the extension corresponding to the said extension number; and
automatically sending incoming calls to the said extension to the received telephone number.
Preferably, the received telephone number is stored in a table in a position corresponding to the said extension number.
The method may comprise:
receiving and checking the said extension number and a password; and
only if the said extension number and the password are identical to previously stored information, proceeding to step b. and/or c.
The office line incoming call may be an incoming call with a direct inward system access (DISA) function. Thus, the method may comprise:
upon request of direct inward system access (DISA) communication, providing a call to the subscriber corresponding to the said received extension number to form a speech path.
Brief Description of the Drawings
The present invention will now be described by way of example with reference to the accompanying drawings in which:
FIG. 1 is a block diagram of an exchange adapted to the present invention; and
FIG. 2 is a flow chart illustrating the procedures of registering and processing remote information in an exchange in accordance with the present invention.
Detailed Description of the Invention
In the following description, the exchange of the present invention may be a private exchange or a key telephone system, and the subscriber's telephone may be a telephone having a display. It is assumed that the exchange of the present invention is a key telephone system, and the subscriber's telephone is a key telephone.
Referring to FIG. 1, a key telephone system of the present invention includes a central processor 111, a ROM (read only memory) 112, a RAM (random access memory) 113, a switching circuit 114, a subscriber circuit 115, an office line circuit 116, a tone generator 117, a DTMF receiver 118, and a DTMF transmitter 119. The central processor 111 controls communication switching and overall operation of the key telephone system to provide a variety of services to the users. The memory 112 stores call, program and initial service data and includes a number of tables for processing program and key data received as shown in FIG.
2. One of them is for converting received key data into character data (hereinafter, referred to as a "character conversion table"), and the other is a function table storing specific function codes. The RAM 113 temporarily stores the data generated during the running of the program by the central processor 111.
The switching circuit 114 switches various tones and voice signals under control of the central processor 111. The subscriber circuit 115 interfaces signals between a subscriber telephone (not shown) and the exchange under control of the central processor 111. In a key telephone system, the subscriber circuit 115 is a key telephone subscriber circuit, and the subscriber telephone is a key telephone. Moreover, in a private exchange, the subscriber telephone is a multi-function telephone having a display and the subscriber circuit 115 has to execute data communication with the multi-function telephone.
The office line circuit 116 seizes an office line, forms an office line speech loop and interfaces the signals between the office line and the exchange, under the control of central processor 111. Here, the office line connects the office line circuit 116 and an office exchange (not shown).
The tone generator 117 generates various tone signals to output the tone signals to the switching circuit 114 under the control of central processor 111. The DTMF receiver 118 analyzes a DTMF signal received from the switching circuit 114 and converts the signal into digital data to output the digital data to the central processor 111. Here, the DTMF signal is the telephone number which the office line subscriber or the extension subscriber inputs. The DTMF transmitter 119 converts the digital data output from the central processor 111 into a DTMF signal and outputs the
DTMF signal to the switching circuit 114. Here, the DTMF signal output from the DTMF transmitter 119 is the telephone number of the office line subscriber generated when the extension side calls the office line side.
In a preferred embodiment of the present invention, when a specific office line call is generated, an identification code of a calling subscriber is checked and, if the identification code is identical to information previously stored by the calling subscriber, received data is analyzed and stored or a corresponding function is set. It is assumed that the specific office line call is an office line with the DISA function. The DISA function allows the key telephone to answer automatically a call input from a specific telephone number, and when an identification code of a calling subscriber is identical to the information previously stored in the telephone, allows the use of the telephone.Therefore, in the preferred embodiment of the present invention, a remotely located user can register information on his or her current place, with a telephone number or character information, register his/her desired function or try to communicate with the called party using the DISA function. In this case, the key telephone system controls the key telephone and displays corresponding information on the display thereof.
The present invention will be described in more detail with reference to FIG. 2. Referring to FIG. 2, a subscriber sets a function using an external office line, when an office line incoming call is first generated, and the central processor 111 controls the switching circuit 114 to connect the office line circuit 116 with the DTMF receiver 118, and in step 211 analyzes a telephone number received through the DTMF receiver 118. At this time, when the received telephone number corresponds to a specific telephone number designated in the system, the central processor 111 recognizes the specific office line call and in step 213 controls the tone generator 117 and the switching circuit 114 to transmit a confirmation tone to a corresponding office line side. Here, the specific office line call may be an office line incoming call of the DISA function.
When the DISA office line incoming call is received, the central processor 111 performs an identification code checking procedure of the calling subscriber. The identification code, which is identification information of the corresponding subscriber, comprises an extension number and a password. Then, after the confirmation tone is generated, the calling subscriber inputs his or her extension number and password. The extension number and password are received through the office line circuit 116, the switching circuit 114 and the DTMF receiver 118. In step 217, the central processor 111 checks a table where extension numbers of subscribers are stored and a table where passwords of subscribers are stored to detect the received extension number and password.In the preferred embodiment of the present invention, the extension number and password are simultaneously input, but may be separately input. If the received extension number and password are not present in the corresponding tables, the central processor 111 in step 245 transmits an error tone through the tone generator 117 and terminates the communication procedure.
If, however, the received extension number and password are identical to those previously stored in the system, the central processor 111 in step 219 transmits a confirmation tone through the tone generator 117 and waits for reception of data. The data to be received is data input by an outside-located calling subscriber. The types of such data are as follows: function data requesting the setting of a specific function, character data for registering a current position or information of the subscriber, data requesting the DISA function by the subscriber, and so on. The central processor 111 analyzes the received key data to detect whether the data is numeric data or character data.
Input of the character data is executed using specific keys, such as, for example, an asterisk (*) key and a pound (#) key, on the key pad. It is assumed in the present invention that character data are generated using the asterisk (*) key and numeric keys, as indicated by the following table < 1 > .
Key Input Character Data space *2 A I **2 B ***2 C *3 D I **3 E | ***3 F I l Table < 1 >
Accordingly, the character conversion table as shown in
Table < 1 > is stored in the ROM 112 and the CPU converts the received data to character data, when the asterisk (*) key data is first input.
Secondly, if the key data is numeric data, the central processor 111 determines whether the key data is data for performing a specific function or the DISA communication function. In the preferred embodiment of the present invention, it is assumed that the key data for the specific functions represents numeric data comprised of two-digit and the following function table < 2 > is provided.
Key Data Function 61 external call forwarding code 62 62 remote paging code 63 information message transmitting code during a user's absence I Table < 2 >
Further, in the preferred embodiment of the present invention, it is assumed that the key data for performing the DISA communication function represents an extension subscriber number of three digits.In this case, the key telephone system has an extension subscriber table as shown in the following table < 3 > .
Key Data Function 201 first extension subscriber 202 second extension subscriber 203 third extension subscriber
Table < 3 >
If the numeric data is input, therefore, the central processor 111 detects whether the numeric data is present in the function table < 2 > and the extension subscriber table < 3 > to execute a corresponding service.
When the character and function service operations are complete, the subscriber generates completion key data. In the preferred embodiment of the present invention, the completion key data is the pound (#) key.
Referring to FIG. 2, if the data reception is made in step 221, the central processor 111 determines whether the input data is character data in step 223. In the event that the asterisk (*) key is input, the central processor 111 recognizes the input data as character data and stores the data in the RAM 113 in step 225. Next, the central processor 111 converts the corresponding character information into character code data, based upon the character conversion table < 1 > . Here, the character code data may be ASCII code. Then, the central processor 111 in step 227 transmits the converted character code data to the corresponding extension subscriber. The character data input is continued until the pound (#) key is input as the input completion key.The central processor 111 continuously converts the character data into character code data and then transmits the converted character code data to the key telephone of the corresponding extension subscriber through a data communication system (not shown).
The key telephone converts the received character code data into a character font and displays the character font in the display. The character data may represent information on the place where the subscriber stays or the current state of the subscriber. Therefore, since the subscriber's position or state information is displayed on the extension telephone, any other person can easily know current subscriber's information.
If the received data is numeric key data in step 221, the central processor 111 detects whether the key data is for setting a key telephone function in step 229. When the key data is input to set a specific function, the central processor 111 checks in step 231 whether the function code corresponds to the input key data in the function Table < 2 > . Then, in step 233, the central processor 111 registers the received data in the table of the corresponding subscriber to perform a corresponding function service and displays the corresponding function set on the corresponding key telephone. Such a function set operation is continued until the pound (#) key is input. The central processor 111 in step the 233 transmits the set function information to the key telephone of the corresponding subscriber through the data communication system.Then, the key telephone displays the received function key information, and when the function key set is completed, the central processor 111 sets and performs the corresponding function.
If, for example, the received numeric key data "61" is input in the step 221, the central processor 111 through the steps 229 and 231 recognizes the key data as an external call forwarding code that is performed when a subscriber forwards an incoming call to an external subscriber. The subscriber inputs a function key code and a telephone number to be sent. The central processor 111 stores the received telephone number within a table at a position assigned to a corresponding extension subscriber in a prescribed area of the RAM 113 and allows the external call forwarding function to be executed. The incoming call to the corresponding extension subscriber is automatically sent to the telephone number stored in the memory 112.
If numeric key data is input in the step 221, the central processor 111 checks whether key data requesting the DISA communication function is input in step 235. When the input key data is DISA communication function requesting data, the central processor 111 performs the DISA function service in step 237. When the received key data is the telephone number of an extension subscriber, the central processor 111 controls the subscriber circuit 115 in step 237 and informs the corresponding extension subscriber of the incoming call. When the corresponding extension subscriber telephone is in an off-hook state, a speech path is formed and the DISA communication function is performed.
On the other hand, when the received key data is the telephone number of an office line subscriber, the central processor 111 controls the switching circuit 114 in step 237 and connects the DTMF transmitter 119 and the office line circuit 116. The central processor 111 transmits the received telephone number data, and when the office line subscriber responds to the transmitted data, the central processor 111 forms a speech path between the outside calling subscriber and the office line called subscriber, thereby performing the DISA communication function service.
Claims (11)
1. An operational method of an exchange comprising:
a. when an incoming office line call is received, receiving an extension number and key data via the office line;
b. if the key data represents character information, converting the key data into character data using a character conversion table and transmitting the character data to the extension corresponding to the said extension number.
2. A method according to claim 1 further comprising:
displaying the character data on a display of the corresponding extension telephone.
3. An operational method of an exchange comprising:
a. when an incoming office line call is received, receiving an extension number and key data via the office line;
b. if the key data represents function information, setting a corresponding function of the extension corresponding to the said extension number.
4. An operational method of an exchange comprising:
a. when an incoming office line call is received, receiving an extension number and key data via the office line;
b. if the key data represents character information, converting the key data into character data using a character conversion table and transmitting the character data to the extension corresponding to the said extension number; and
c. if the key data represents function information, setting a corresponding function of the extension corresponding to the said extension number.
5. A method according to any one of claims 2-4 in which the said corresponding function is accessed from a function table.
6. A method according to claim 4 or claim 5 comprising, if the received key data represents an external call forwarding code:
receiving a telephone number via the office line and setting an external call forwarding function of the extension corresponding to the said extension number; and
automatically sending incoming calls to the said extension to the received telephone number.
7. A method according to claim 6 in which the received telephone number is stored in a table in a position corresponding to the said extension number.
8. A method according to any preceding claim comprising:
receiving and checking the said extension number and a password; and
only if the said extension number and the password are identical to previously stored information, proceeding to step b. and/or c.
9. A method according to any preceding claim in which the office line incoming call is an incoming call with a direct inward system access (DISA) function.
10. A method according to any preceding claim comprising:
upon request of direct inward system access (DISA) communication, providing a call to the subscriber corresponding to the said received extension number to form a speech path.
11. An operational method of an exchange substantially as described herein with reference to the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR19950019794 | 1995-07-06 | ||
| KR1019960021583A KR100193824B1 (en) | 1995-07-06 | 1996-06-14 | Incoming service method of exchange |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9614308D0 GB9614308D0 (en) | 1996-09-04 |
| GB2303276A true GB2303276A (en) | 1997-02-12 |
| GB2303276B GB2303276B (en) | 1997-09-03 |
Family
ID=26631135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9614308A Expired - Fee Related GB2303276B (en) | 1995-07-06 | 1996-07-08 | Office line incoming call service method |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2303276B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9401870A (en) * | 1993-11-09 | 1995-06-01 | Icl Data Oy | Information system for a automatic switch. |
| CN1097969C (en) * | 1996-12-31 | 2003-01-01 | 三星电子株式会社 | Method of controlling call for identical incoming office number in exchange system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2122843A (en) * | 1982-03-30 | 1984-01-18 | Guestel Limited | Telephone interface unit |
| GB2136246A (en) * | 1983-02-03 | 1984-09-12 | Sharp Kk | Combined telephone and modem |
| GB2147769A (en) * | 1983-10-08 | 1985-05-15 | Hashimoto Corp | Information transmission/reception system using pushphone and information reception apparatus |
| GB2178927A (en) * | 1985-07-09 | 1987-02-18 | Canon Kk | Alphanumeric character transmission |
| EP0279884A1 (en) * | 1985-09-03 | 1988-08-31 | John Paisley Dargan | Telephonic data access and transmission system |
| GB2236232A (en) * | 1989-08-11 | 1991-03-27 | Korea Telecommunication | Voice information service system |
| GB2286092A (en) * | 1994-01-31 | 1995-08-02 | Sdx Business Systems Limited | Telephone communications switch system and apparatus |
-
1996
- 1996-07-08 GB GB9614308A patent/GB2303276B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2122843A (en) * | 1982-03-30 | 1984-01-18 | Guestel Limited | Telephone interface unit |
| GB2136246A (en) * | 1983-02-03 | 1984-09-12 | Sharp Kk | Combined telephone and modem |
| GB2147769A (en) * | 1983-10-08 | 1985-05-15 | Hashimoto Corp | Information transmission/reception system using pushphone and information reception apparatus |
| GB2178927A (en) * | 1985-07-09 | 1987-02-18 | Canon Kk | Alphanumeric character transmission |
| EP0279884A1 (en) * | 1985-09-03 | 1988-08-31 | John Paisley Dargan | Telephonic data access and transmission system |
| GB2236232A (en) * | 1989-08-11 | 1991-03-27 | Korea Telecommunication | Voice information service system |
| GB2286092A (en) * | 1994-01-31 | 1995-08-02 | Sdx Business Systems Limited | Telephone communications switch system and apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9401870A (en) * | 1993-11-09 | 1995-06-01 | Icl Data Oy | Information system for a automatic switch. |
| CN1097969C (en) * | 1996-12-31 | 2003-01-01 | 三星电子株式会社 | Method of controlling call for identical incoming office number in exchange system |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2303276B (en) | 1997-09-03 |
| GB9614308D0 (en) | 1996-09-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20090708 |