KR900006776B1 - Processing method limiting some of called subscribers in pabx - Google Patents

Abstract

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Description

Restrictive call handling method of incoming subscriber line when accepting private exchange in electronic exchange

1 is a block diagram of a portion of an electronic exchange for explaining the present invention.

2 is a limited call flow diagram of a private subscriber terminator circuit in an electronic exchange according to the present invention.

3 is a memory table map of a private switch subscriber line in an electronic switch according to the present invention.

* Explanation of symbols for main parts of the drawings

1: line matching device 2, 4: analog line control processor

3 private exchange matching device 5 subscriber line processor

6: digital line concentrator 7: tone generator

8 multi-frequency matching device 9 subscriber signal processor

10: station translation processor 11: switching processor

12: switching composite device 50,41: first-second analog line matching device

52: signal processing device

The present invention relates to a method for handling outflow of an incoming receiver line when accepting a private exchange in an exchange in an electronic exchange, and more particularly, to a method of handling call processing of a receiving party's circuit in a private exchange.

A typical electronic switchboard has a board that can accommodate and handle subscriber telephone lines, private branch auto switch subscriber lines, public telephone subscriber lines, and two-line co-subscriber lines.

In the general-scale electronic switching system having the above function, it is possible to allocate a large amount of circuits to private subscriber subscriber lines in the total accepting trunk line.

In an electronic exchange, when a private exchange is accepted in an exchange, a representative number representing the private exchange and an individual number assigned to the remaining lines are assigned. When a general subscriber requests a call to a private exchange, the conventional incoming call processing method is as follows. Same as First, if there is a call request on the line of the individual number, the state of the individual number is examined and the incoming call is processed according to this state. In other words, if the individual number is busy, a busy tone is sent to the general subscriber. If the idle state is idle, a ring signal is supplied to the individual line to which the individual number is assigned and a ring back tone is given to the general subscriber. To establish a channel between the general subscriber and the private number of the private exchange and initiate the call.

If the general subscriber accommodated in the exchange dials the representative number of the private exchange housed in the exchange, checks whether the line of the representative number is busy and establishes a channel with the representative number line and the general subscriber even when idle. If the line of the number is busy, the telephone line of the individual number that can be called is searched out of the total number of receiving lines in the private exchange without immediately busying, and the free line determines the existence of the existence signal.

For example, if the representative number accommodated in the private exchange is 999-0000, and the individual number is accommodated from 999-0001 to 0015, the status of the line from 999-0001 to 0015 is searched and Establish a line of call and line for general subscribers.

However, in the conventional private exchange incoming caller calling method operating as described above, when the representative telephone line is non-instructed in a state where the call volume is very small, such as at night or on a public holiday, the telephone line is searched for the premise line and the communication path is established. This causes a problem of increasing the load of the software.

In addition, when it is necessary to receive only part of the receiving line, for example, at night or on holidays, such as a telephone in the vicinity of a job or a worker in the vicinity of the outside was not possible to receive the call from the conventional method.

Accordingly, it is an object of the present invention to provide a limited call processing method for searching only a part of a receiving line capable of receiving a private exchange at the request of a private exchange housed in an electronic exchange to form a call path when a representative number is called. It will be described below in detail by creating the accompanying drawings of the present invention.

FIG. 1 is a block diagram of a portion of an electronic switch, and includes a line interface device 1 for performing hardware registration with the general subscriber telephone 100 and the control and subscriber 100 of the line matching device 1. And a first analog line matching device 50 configured to process an input / output signal and a call of the subscriber 100, comprising an analog line circuit processor 2 for analyzing and controlling the state, dialing information, and the like. PBX Subscriber Line Board (BSB) (3), which performs hardware matching with subscribers of Private Automatic Branch Exchange (PABX), control of BSLB (3) and subscriber trunk line of private exchange 101 A second analog line matching device (51) configured to perform analog line control processor (4) for analyzing and controlling line state, dialing, and the like, and to control input / output signals and calls of a subscription line of private switch 101; Analog Line Control A subscriber line processor (5) for executing the control of the subscriber's call by receiving the output of the parser (2) and the subscriber's line state and dialing information, and the subscriber line processor (5). Digital Line Concentrator 6, which forms a path for supplying the subscriber's condensation and a beeping sound under the control of a subscriber, and a tone generator 7 for supplying various tones of the exchanger. And monitoring and controlling the states of the Multi-Frequancy Interface Device 8 and the Multi-Frequency Interface Device 8 for dialing digit reception of a push button telephone. A signal processing device 52 configured to process a subscriber's dialing call, comprising a subscriber signal processor 9 for reporting to the line processor 5, and the subscriber line processor; A number translation processor 10 for translating the number translation request from the station number and a switching processor for outputting a switching control signal by a program embedded in the switching control request signal of the subscriber line processor 5; Switching processor 11,

It is composed of a Switching Complex Device (hereinafter referred to as SWCD) 12 which is switched under the control of the switching processor 11 and forms a mutual communication path between the subscriber and the subscriber.

2 is a flow chart according to the present invention, when the general subscriber dials the representative telephone number of the private exchange, if the electronic exchange housed with the private exchange retrieves the state of the representative telephone line of the private exchange, the normal call processing is performed. And if it is busy, searching whether the restricted search bit (b) is set, and in the searching process, reading the data of the registered set "1" restricted search line area and searching whether the line is busy to process normal call processing when the line is idle. In case of non-specification, the process of searching for the free line by 1 increment and searching whether the search of the process exceeds a callable line and busy processing the call when exceeded, and the entire line when the restriction bit is not set in the search process If a free line exists by hunting for incoming lines, and a line is established, the free line does not exist. It is a process of busy processing the incoming signal.

3 is a memory table map of a private switch subscriber line in the subscriber line processor 5 of FIG. In the table area, A is a 2 byte area of the call state of the receiving line, and is set so as to indicate a line call state of 1 subscription line per bit, and area d is the area of each 1 bit. When all 16 bits of A are set to "1", it is set to indicate that the whole table is busy. When one of the 16 subscribers of the receiving table is not used, it is reset to "0" and the table is busy. Table c is a free / table (table busy / free map), and area c is a bit indicating the presence or absence of an extension table. When expanded, area c is set to "1", and area u is "1" even if only one line of 16 subscriber lines is called. Table usage bit to be set, area n is a 1 byte area for storing the number of lines in the private exchange, area s is 1 byte, and a table numbering area (Start table No) to start, area 1 is an extended cell Number Cell (Extension Cell No) Reverse g counter area to start hunting (Hunting Counter Start) area b is when set to "1" as the limited search register bit (Limit Searching Registeration bit) are registered. k is a limit searching line resistance area where the number of lines for limit search is stored.

Area B is a 16-bit (2 byte) area, which is an acquisition bit set by indicating the reception status of 16 trunk lines connected to a private exchange, and is set to "1" if it is "0". When is not acceptance. The area GLN is a 2-byte area representing a representative line number, and LN1-LN15 are 2-byte areas each being an individual line number. At this time, b and k in the above areas can be canceled by the user of the private exchange by using a special service registration and cancellation code.

An embodiment of FIG. 2 according to the present invention will now be described with reference to FIGS. 1 and 3. Now, when the general subscriber 100 "hooks off" to talk to the subscriber of the private exchange 101, the "hook-off" state is sensed in the line matching device 1. At this time, the analog line control processor 2 detects the state of the line matching device 1 and outputs the state of the subscriber 100 to the subscriber control processor 5.

The subscriber control processor 5, which has entered the " hook-off " state of the subscriber 100, controls the line matching device 6 to set a dial tone generated by the generator 7 to the line matching device 1; The subscriber line processor 5 controls the digital line concentrator 6 by the output of the analog line control processor 2 when the subscriber SB1 dials in this situation. Blocks dial tone transmission.

The MFC dial signal is inputted to the multi-frequency matching device 8 through a DTMF Receiver Tine Slot assigned by the control of the subscriber line processor 5.

Accordingly, the MFC digit dialing of the subscriber 100 is decoded in the DTMF in the multi-frequency matching device 8, and the subscriber signal processor 9 controlling the multi-frequency matching device 8 receives the decoded dialing digit data from the subscriber line processor. Output as (5).

At this time, the subscriber line processor 5 transmits the received digits to the station number translation processor 10 to request the station number translation, and the station number translation processor 10 completes the station number translation to determine which subscriber in the system is to receive a call request. The subscriber line processor 5, which is in charge of the corresponding subscriber, makes an incoming request as shown in FIG.

When the subscriber line processor 5, which has received a call request in FIG. 2 (2a), is determined to be a normal subscriber that searches for the state of the subscriber line in FIG. The call of is handled in (2c).

In the case of (2b), if it is determined that the line of the private exchange is a subscriber line processor 5, the subscriber line processor 5 accesses the memory table of FIG. 3, and then the line with the incoming request of FIG. (GLN) outputs a switching connection signal to the switching processor 11 to secure the call of the line of the corresponding number even when not the representative phone, and receives a switch connection notification from the switching processor 11 to the corresponding subscriber. The analog subscriber line control processor 4 outputs a command path to the analog subscriber line control processor 4, and at the same time, the analog subscriber line control processor 2 sends a control signal capable of transmitting an incoming call, that is, a ringback tone signal. In the course of 2 degrees (ZE), the call of the relevant line is handled.

If it is determined in the (2d) retrieval process that the called line number is GLN as the representative number, it is searched in the process of FIG. 2 (2f) to see if the corresponding GLN is one set in the subscriber table of the accessed third-party private exchange. If the result judges that the GLN is not set to "1", it is determined that it is in an idle state, and a command signal is sent to the analog subscriber line control processor 4 and the representative line of the PABX 101 connected to the BSLB 3 is determined. The ring signal is sent to the GLN, and the switching processor 11 is requested to be connected by telephone, and normal call processing is performed as shown in FIG. At this time, the switching processor 11 assigns a corresponding time slot between the subscriber line 100 and the representative line of the private exchange 101, and the subscriber line processor 5 determines that the analog subscriber line control processor 4 has a private exchange ( A hang off signal from the analog subscriber line control processor 4 is received.

If the GLN of FIG. 3 is set in the searching process of (2f) and it is determined that the representative telephone line is busy, the subscriber line processor 5 sets the restriction search registration bit b to " 1 " In step 2h, it is searched. At this time, if the restriction search registration bit (b) in the table area of FIG. 3 is not set to 1, the process of (2i), which is the same route as the conventional method, is executed. That is, 2 bytes of data of the area A indicating the call state of the accommodation line of FIG. 3 are read out, and a line which is set at a level of "0" of all the reception lines and which can be called is hunted.

The subscriber line processor 5, which executes the process of 2i, searches for the presence of the free line in step 2j, processes the normal call in step 2k if it exists, and processes the incoming signal in step 21 when it does not exist. If the search for 2h determines that the limit search light bit in the table area of FIG. 3 is set to "1", the data of the limit search line storage area k is read in the table area of FIG. 3 in step (2m). Lead the number of incoming lines.

If the number of incoming lines that are read in step (2m) is " 3 ", for example, " 3 ", the subscriber line processor 5 checks in step (2n) whether the state of the individual subscriber LN1 in FIG. If it is not busy, as described above, the normal incoming signal processing is processed in step 2o, and when the LN1 state is busy, the incoming call designation line is incremented by one in the process of FIG. Access the increased LN2 in LN1.

The subscriber line processor 5 accessing the increased line as described above compares the line limit data of the limited search resistance area k of the memory B of FIG. If it is determined that the limit has been exceeded, and if it is determined that the limit is not exceeded, the above-described steps 2n and 2o are executed. If the process search of (2q) exceeds the callable line, the current incoming request signal is busyed in step 2r to transmit the subscriber 100 busy tone.

Therefore, the restriction search registration bit (b) and the incoming call number designation data of the restricted search line area (k) are saved in the private exchange subscriber table in the processor board that manages and controls the subscriber line and by a predetermined control program. It can be seen that the call to the private subscriber line can be restricted.

As described above, the present invention sets unnecessary search by setting a search restriction data area and an area indicating whether or not to limit search in the private exchange subscriber table, and limiting and calling private exchange recipients accommodated in the electronic exchange by a predetermined program. It is possible to facilitate the use of the exchange user, and at the same time, it is possible to reduce the load of the software when accommodating unnecessary private exchanges, thereby improving the efficiency of the system.

Claims (1)

A method of restricting call processing of an incoming subscriber line of a private exchange housed in an electronic exchange having a subscriber memory table of a private exchange, wherein the incoming call signal is searched for the incoming line type when the incoming call arrives, and the corresponding incoming line is received. In the case of normal processing and the private exchange subscriber receiving line, the first and second lines (2a to 2d) of searching whether the incoming line is the representative number line, and the first and second lines (2a to 2d) determine that the incoming line is not the representative number line. The second step (2e-2f) searching for whether the representative number line is busy when processing the call of the corresponding line and determining that the representative number line is busy, and the representative number line is busy in the second step (2e-2f). If it is determined that the restriction search registration bit is set in the private exchange receiving subscriber memory table, the third step (2h) and the third step (2h) Fourth, which hunts incoming lines among all the receiving lines when the limit search light bit is not set in the color, processes normal incoming signals when there is a free line, and busys incoming signals when there is no free line. If it is determined that the restricted search registration bit is set in the steps 2j to 2k and the search in the third step (2h), the number of incoming lines of the restricted search line area in the private exchange subscriber memory table is read and the leaded call is received. And a fifth step (2m to 2r) of searching only the number of possible lines and sending an incoming signal to a line in a free state.

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