KR910002768B1 - Interface circuit in telephone system - Google Patents

Abstract

The system, when a telephone or a keyphone is connected to any port of the modular jack discriminates the connected phone so that the user can use the phone or keyphone arbitrary without discriminating the exclusive port of the system. The system includes a trunk interface (10) for transmitting the voice and tone signal through stationary lines (CD1-CDM), a network unit (40) comprised by rows and columns so that the pathes formed with an expanded port driver (30) connected to expanded ports (OP Port1-OP PortN) and the network unit (40) to drive the signal transmitted through a door phone a terminal, a MOH, and a multiplexer unit (50) is formed.

Description

Automatic hybrid system for both general phone and key phone and control method

1 is a module connection system diagram.

2 is a circuit diagram according to the present invention.

3 is a detailed circuit diagram of the multiplexer portion 50 and the station modular jack portion 90 of FIG. 2 according to the present invention.

4 is a detailed circuit diagram of the first and second subscriber line interface cards 70 and 81 and the multiplexer section 50 of FIG.

5 is an interrupt flowchart according to the present invention.

6 is a flowchart of a general telephone service according to the present invention.

7 is a flowchart of a key-phone telephone service according to the present invention.

* Explanation of symbols for main parts of the drawings

10: trunk interface 20: central processing unit

30: expansion port driver 40: network

50: multiplexer unit 60: central processing unit control circuit

70, 80: first and second subscriber line interface card

The present invention relates to an automatic hybrid (Auto Hybird) system for both a general telephone and a key telephone telephone and a control method thereof.

Stations using conventional telephones and key phones connected to a key telephone system are used in combination with specific ports by modular jacks. The general phone and the remaining ports are fixedly divided into key phone phones, or can be used for both general phone and key phone phones. However, even if the port has a port that can be used as a general telephone and a key phone, there was an inconvenience in that the switch operation must be performed externally.

Accordingly, an object of the present invention is to provide convenience for use by automatically checking whether it is a general phone or a key phone when any port of the system is connected to a general phone or a key phone, and whether the user uses a cheap general phone or not It is to provide a circuit that can be simply connected to the modular jack when you want to selectively use a key-phone telephone providing a service.

Another object of the present invention is to provide a method that can be used without any external operation by connecting a general telephone or a key phone telephone to any port of the hybrid system without a switch operation.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a module connection system diagram in which M trunk lines (CD1-COM), N ports (Port1-PortN), and N optional expansion ports (OP Port1-OP PortN) are connected to an automatic hybrid system (AHS). do. Expansion port (OP Port1-OP PortN) is door-phone. MOH, terminal, etc. can be connected.

2 is a circuit diagram according to the present invention, which is connected to a trunk line (CD1-COM), the trunk interface 10 for interfacing so that voice and tone signals can be transmitted by a control signal of the control terminal 21, and a program. The central processing unit 20 for processing the data input according to the control unit and generating control signals for each part, the central processing unit control circuit 60 for controlling the central processing unit 20, and the control signal from the central processing unit 20. Network unit 40, which is composed of rows and columns, and an expansion port (OP Port1-OP PortN) to receive the data and to form paths necessary for operation of a trunk line, a station, an expansion port path, and a system; 40 is connected to the expansion port driver 30 to drive the signal through the door phone, terminal, MOH under the control of the central processing unit 20, and through the station modular jack 90 as shown in Figure 4a telephone It has a terminal to connect, and transmits ring signal through transformer TR1 according to the state of switch SW1-SW2, detects loop on / off and dial pulse from loop detection circuit 702, and supplies power and current. A first subscriber line interface card 70 for general telephone interface, which limits -48V and maximum current flow in the circuit 70, and a terminal for connecting a key telephone telephone through the station modular jack 90 as shown in FIG. 4B. Line power is supplied from the first and second power supply circuits 800 and 802 through the transformers TR11 and TR12, and transmits the signaling data to the central processing unit 20 through the transformer TR11 and the transformer TR12. Second subscriber line interface card 80 for a key phone telephone interface for transmitting voice through the phone, and the first and second subscriber line interface cards (70, 80) are connected to a general telephone and key phone telephone Is connected to the network module 40 and connected to the first and second subscriber line interface cards 79 and 80 as shown in FIG. The multiplexer unit 50 selectively switches the analog switches AS1 and AS2 by the output of the inverter N1 according to the generated control signal so that n general telephone passes and n keyphone telephone call passes are selectively connected. It is composed of

3 is a detailed circuit diagram of the multiplexer unit 50 and the station modular jack unit 90 of FIG. 2 according to the present invention. The station voice paths STN1-STNn and the multiplexer MUX1 of the network unit 40 are shown in FIG. MUXP), and the multiplexer (MUX1-MUXP) has an output terminal connected to a general telephone voice path (NP1-NPn) and a key phone telephone voice path (KS1-KSn) so that the general telephone pass (NP1) and a key phone telephone voice are connected. Connected to the first and second subscriber line interface cards 70 and 80 on the path KS1 and connected to the station module jack 90, and to the control terminals CON1 and CON2 of the multiplexers MUX1 and MUXP. The control signal of the central processing unit 20 is configured to be applied. That is, the two lines of the first subscriber line interface card 70 are connected to pins 5 and 2 of the modular jack 90 as shown in FIG. 4A. The second subscriber line interface card 80 is an interface circuit for controlling a key-phone telephone and includes a signaling circuit 801 as shown in FIG. 4B. Four lines of the second subscriber line interface card 80 are connected to the station modular jacks 90, 1, 3, 4, and 6 pins, and the power supply of the key-phone telephone is the first and second power supply circuits of FIG. 800 and 802 are supplied to the center-tapped transformers TR11 and TR12. The separation of the general telephone and the key phone telephone connection pins from the station modular jack unit 90 is to prevent the power supply, regardless of the general telephone or the key phone telephone, thereby eliminating the need for a relay switch for power control.

5A is an interrupt flowchart according to the present invention, and FIG. 5B is a mode register example.

6a is a flowchart of a general telephone service according to the present invention, and FIG. 6b is a jitter table diagram.

7 is a flowchart of a key-phone telephone service according to the present invention.

Hereinafter, a specific embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6, and FIG. 5A is a flowchart processed by an interrupt, and thus the routine of the signal of the interrupted module is processed every predetermined time. Clear the register or buffer used as the counter in step (4a). Normally it takes a lot of time to signal the whole port, so the process (4a) is processed when the initial and counter value are n. That is, it takes nT time to signal each port once signal module is processed and signal is processed after the next T time after count increase. In Fig. 5a, these are shown in one module. In step 4b, the corresponding port is signaled to determine whether the received data is null in step 4c. Here, Null is either øøH or øFFH depending on the signaling interface configuration. If the received data is null, it is determined in the process (4e) that it was previously serviced by a general telephone. Otherwise, it is cleared by the previous jitter table, and the status of the multiplexer unit 50 is connected to the general telephone pass and serviced by the general telephone. Reset the corresponding bit in. If at step (4e) it is found to have previously been serviced by a regular telephone, jump to step (4i).

If the received data is not null in step (4c), it is checked whether the service was previously performed with the key phone in step 4d. Otherwise, the previous jitter table is cleared and the path of the multiplexer unit 50 is connected to the key phone phone path. The status is set to the corresponding bit in the buffer so that it can be a key-phone phone service in the future. If the service was previously serviced by the key-phone telephone in step (4d), go to step (4e) to process the data and go to step (4i). In step (4i), the counter value is increased by one to determine whether all the n ports have been serviced in step (4j). Then, after the next T time, service is started again from the pod (port ø). Will be served. The status buffer indicated by (5b) is set or reset to ø if each bit is set for each port and is set to ø if it turns out to be a normal phone in signaling. The bit specified value of the status buffer is important to determine whether to serve as a regular phone or key phone in the basic program.

Looking at the general telephone service by the base program of FIG. 6, the "port SRVI" is treated as a subroutine or module of the base program. In step (5a), the counter is cleared, and the counter must be set separately from the counter of FIG. 5 because the interrupt and the base program are processed separately. In step (5b), shift the starter table starting address JUNCTB øø of the general telephone into the index register. The index registers are IX and IY registers in the central processing unit 20. In step (5c), check the corresponding bit to determine whether it is a general telephone. Otherwise, go to the procedure (5b) corresponding to the general telephone service, and then go to the procedure (5e) corresponding to the general telephone service in the setter table. Increment the value and add the value m to the index register. In this case, m is the number of bytes allocated to each jitter table, and the jitter table is as shown in FIG. 6B. At this point, it is important to think of software and hardware jitter separately. Hardware jitter can be controlled at the time of port service. The jitter table needs to store dialed numbers and many other things. This is abbreviated because it is specified in detail in other keyphone programs and is not particularly relevant to the present invention. The separate phone and phone phone jitter is separated from the jitter table to have a separate database for convenience in programming and debugging. It can be used together if there is not enough RAM. In step (5f), check whether all port station ports are serviced, or finish (p. 5c) to service the next port.

FIG. 7 is a flow chart for the key phone telephone and is similar to FIG. However, if the flowchart of FIG. 7 is to be processed after FIG. 6, or if the telephone is a telephone telephone in FIG. 7 (6c), the process of FIG. 7 (6e) can be combined into one module.

As described above, the present invention has the following effects. First, the user operates automatically just by connecting a key phone or a general telephone without any manipulation. Second, no switch is needed to read the status. Third, there is no need for a separate switch or relay for power control of the station.

Claims (3)

In the system that can be used by connecting a general telephone and a key-phone telephone having a trunk interface 10, the central processing unit 20, the central processing unit control circuit 60, the network unit 40, the expansion port driver 30, The terminal has a terminal for connecting the general telephone, and transmits a ring signal through the transformer TR1 according to the state of the switch SW1-SW2, and detects the loop on / off and dial pulses from the loop detection circuit 702 and supplies power. And a first subscriber line interface card 70 for limiting -48V and a maximum current flow in the current limiting circuit 70, and a terminal for connecting the key-phone telephone, and through the transformers TR11 and TR12. Line power is supplied from the power supply circuits 800 and 802 and transmits signaling data to the central processing unit 20 through the transformer TR11 and transmits voice through the transformer TR12. A station modular jack unit 90 connected to a dual subscriber line interface card 80, the first and second subscriber line interface cards 70 and 80, and to which the general telephone and a key phone telephone are connected as a module jack, and the network unit 40 is connected to the first and second subscriber line interface card (70, 80), and selectively by the output of the inverter (N1) according to the control signal generated in the central processing unit (20) Automated hybrid system for both general phone and key phone, characterized in that it consists of a multiplexer unit (50) for switching the number of n general phone pass and the n key phone phone call path by switching AS1, AS2). A method for controlling the port connection use of a general telephone or a key telephone telephone, comprising: a first telephone for clearing a corresponding count value from a module of the telephone or a telephone telephone and checking whether the telephone is a telephone or a telephone telephone by moving the start address of the jitter table to an index register In steps 5a-5c and 6a-6c and in the first steps 5a-5c and 6a-6c, when the general telephone or the keyphone is not the counter, the count value is counted as the number of the module connection ports, and the corresponding general telephone or the keyphone is used. In the second step (5d-5e, 6d-6e) and the second process (5d-5e, 6d-6e) to service a general telephone or key phone telephone in the corresponding jitter table, the general telephone is counted B. The hybrid hybrid control method for general telephone and key phone telephones, comprising a third process (5f, 6f) which checks whether each service is completed on all ports of the key telephone telephone. A method for handling interrupts using a port connection of a general telephone or a key telephone telephone, the first step (4a-4c) of relaying a corresponding register and signaling a corresponding port to check whether reception data is invalid, and the first step ( The second step (4d, 4e) and the second step (4d, 4e) of checking whether the corresponding bit of status is the first state when it is invalid in 4c), and whether it is the second state when it is not invalid. A third step (4f, 4g) of clearing the table of the corresponding jitter, resetting the bit and forming the path according to a general telephone or a key-phone telephone when the status is not 1 or 2; In the state or the fourth step (4h, 4i, 4j) to check the total number of ports by increasing the count value from the processing of the third step (4f, 4g) of the general telephone and key phone telephone Automatic hybrid control method.

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