JP2002152783A - Subscriber circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a line control function part in a subscriber circuit by using a general logical interface from a host device. SOLUTION: In a subscriber circuit (30), control messages are received and by analyzing these messages (31), the operation of respectively line state function parts (33-38) in the subscriber circuit can be controlled. At the same time, line state monitor information from respective line state monitor parts (39 and 40) in the subscriber circuit is edited to a message form in an editing and transmitting circuit (42) and can be transmitted to the host device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an analog telephone,
Alternatively, the present invention relates to a subscriber circuit for an analog line or a digital line opposite to a digital line termination circuit.

[0002]

2. Description of the Related Art As shown in FIG. 4, a subscriber circuit 1 is generally connected to an analog telephone 2 via a 2W metallic line 3, and transmits a communication signal to a network unit 5 of a host device 4. For controlling the operation of the subscriber's circuit 1 or controlling the status monitoring information detected by the subscriber's circuit 1 with the control unit 7 of the host device 4. It is connected by a control interface 8 for notifying the unit 7.

Conventionally, when the subscriber's circuit 1 is controlled by the control unit 7 of the host device 4, the line control information corresponding to each line control function unit in the subscriber's circuit 1 is stored in the subscriber circuit 1 in a bit map system. Is transmitted to each control function unit. Similarly, the monitoring information detected by each line state monitoring unit of the subscriber circuit 1 is developed into a bit map corresponding to each line state monitoring unit in order to notify this to the control unit 7 of the host device 1. From the control unit 7 of the host device 4.

FIG. 5 is a diagram showing in detail an example of a connection form between a conventional subscriber circuit and a host device. As shown in this figure, a signal highway 10 is generally used for connection between a plurality of subscriber circuits # 1, # 2,. In this case, a communication signal from the network unit 5 of the host device 4 to each of the subscriber circuits # 1, # 2,... #N is transmitted from the control unit 7 of the host device 4 to each of the subscriber circuits # 1, # 2,. The signal is multiplexed with a control signal to be transmitted for controlling the operation of n by the multiplexing circuit 11 and then transmitted to the subscriber circuit via the signal highway 10. The transmission multiplex signal is separated into the original communication signal and control signal by the signal separation circuit 12, and supplied to each subscriber circuit. At this time, the control signal is transmitted via a reception register 13 in a bitmap manner in a bitmap manner, by a test pull-in switch 14, a call signal transmission switch 15, a normal / reverse switch 16, a call current supply circuit, and the like. 17, a 2-wire / 4-wire conversion circuit 18, a digital encoding / decoding circuit 19, and the like, to control the operation of these circuits.

On the other hand, the communication signal supplied from the analog telephone to the subscriber circuit 1 via the two-wire lines L1 and L2 and converted into a digital signal by the digital encoding / decoding circuit 19 is converted into a multiplexing signal by the multiplexing circuit 23. , A ring trip circuit 2 which is a line state monitoring unit in the subscriber's circuit.
0, which is multiplexed with a line state monitoring signal which is developed and supplied to a bit map from the call monitoring circuit 21 and the like via the transmission register 22 and transmitted to the host device 4 via the signal highway 10. This transmission multiplex signal is separated into the original communication signal and the monitor signal by the signal separation circuit 24 in the host device 4. Based on this control signal, the control unit 7 of the host device 4
Can determine the processing to be performed next, and control the line control function units 14 to 19 and the higher-level device 4 of each subscriber circuit.

Since the conventional control interface as described above is controlled by a bit map corresponding to each of the line control function units 14 to 19 of the subscriber circuit, it is necessary to use a special interface depending on the configuration of the subscriber circuit. is there.

The control signal and the monitoring signal of the conventional subscriber circuit are configured as shown in FIG. 6, for example. That is, these signals are added to the frame bit F ₁ to F ₃ a control signal bits C ₁ -C ₂₁ and monitor signal bits S ₁ to S ₂₁ to send and receive at the bit map method, composed of 3 multiframe structure Is done. Here, the control signal bits C _{1 to} C
_21, which corresponds to the line control function unit of each subscriber circuit, the monitoring signal bits S ₁ to S _21, which corresponds to the line state monitor of the subscriber circuit.

The control signal bits C _{1 to} C ₂₁ and the monitoring signal bits S _{1 to} S ₂₁ depend on the hardware configuration of the subscriber circuit, and when the hardware configuration of the subscriber circuit changes,
This is a special interface that depends on the hardware configuration of the subscriber circuit, meaning that the meaning of each bit changes. For this reason, it is necessary for the higher-level device to grasp the type of the hardware configuration of the subscriber circuit, and then perform the line control and the monitoring of the line state under the interface conditions suitable for the hardware configuration.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a subscriber circuit which can be controlled by a general-purpose interface.

[0010]

According to the present invention, there is provided a subscriber circuit which accommodates an analog line or a digital line and has a plurality of line control function units and a line state monitoring unit. Means for receiving the line control information from the control unit of the higher-level device in the form of a logical message, analyzing the contents of the logical message, and controlling each of the line control function units, Means for editing the line status monitoring information from each line status monitoring unit into a logical message format and transmitting the line status monitoring information in the logical message format to the control unit of the higher-level device. .

[0011]

According to the subscriber circuit having the above-described configuration, it is possible to control the subscriber circuit by a control signal in a logical message format, instead of the conventional subscriber circuit control system by the bit map system.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to explain the present invention in more detail, the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a first example of a subscriber circuit 30 according to the present invention.
FIG. 2 is a schematic block diagram illustrating a configuration of an example. A line control signal Sc in the form of a logical message from a control unit (not shown) of a higher-level device is received by a message receiving / analyzing circuit 31 and its contents are analyzed. The line control signal Sc is the next control signal. Held until received. Control signal received
Based on Sc, the order development circuit 32 sends a control signal to each line control function unit, for example, a test pull-in switch 33, a call signal transmission switch 34, a normal / reverse switch 35, a call current supply circuit 36, a 2-wire / 4-wire. Conversion circuit 37,
The operation is expanded to a bit map corresponding to the digital encoding / decoding circuit 38 and the like, and the operation of each of the line control function units 33 to 38 is controlled.

The line state monitoring information detected by the ring trip circuit 39, the call monitoring circuit 40, and the like in the subscriber circuit 30 is collected by a monitoring information collection circuit 41 and constantly monitored, and a notification is sent to a higher-level device. If necessary, the monitoring information editing / transmission circuit 42 edits the signal into a logical message type signal and notifies the host device (not shown) as a monitoring signal _S0 .

With such a configuration, the line state monitoring signals such as the response detection and the end-of-call detection of the subscriber circuit 30 which have been conventionally transmitted / received in a bitmap manner, and the respective line in the subscriber circuit 30 Control information signals for power supply to the control function units 33 to 38, transmission of a call signal, transition to a call state, and transition to a call monitoring state can be transmitted and received in a logical message format as shown in FIG. . In addition,
In FIG. 2, parts that are the same as the components in FIGS. 1 and 4 are given the same reference numerals.

FIG. 3 shows an example of a method for connecting a subscriber circuit and a higher-level device according to the present invention. In this figure,
1 and 5 are denoted by the same reference numerals as those of the components described with reference to FIGS. According to this example, each subscriber's circuit 30 and the higher-level device 4 are connected by the synchronization signal highway 10 based on time division multiplexing as in the related art. However, according to the present invention, a general-purpose interface can be applied to the control interface. Therefore, not only the synchronous highway but also various transmission paths can be used.

[0017]

As described above, according to the present invention,
A general-purpose logic interface can be used as a control interface for the subscriber circuit.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a message control type subscriber circuit according to the present invention.

FIG. 2 is a block diagram showing an outline of a line state monitoring and line state control method for a subscriber circuit according to the present invention.

FIG. 3 is a block diagram showing an example of a connection method between a subscriber circuit and a host device according to the present invention.

FIG. 4 is a schematic block diagram showing a connection method between a subscriber circuit and a host device.

FIG. 5 is a block diagram showing in detail an example of a conventional connection method between a subscriber's circuit and a host device.

FIG. 6 is a diagram showing an example of a control signal and a monitoring signal of a conventional subscriber circuit.

[Explanation of symbols]

 1, 30 subscriber circuit 4 host device 5 network unit 6 main signal highway 7 control unit 8 control interface 10 signal highway 11 multiplex circuit 12 signal separation circuit 13 reception register 14, 33 test pull-in switch 15, 34 paging signal transmission switch 16 , 35 Normal / reverse switch 17, 36 Communication current supply circuit 18, 37 2-wire / 4-wire conversion circuit 19, 38 Digital encoding / decoding circuit 20, 39 Ring trip circuit 21, 40 Communication monitoring circuit 22 Transmission register 23 Multiplexer 24 Signal separation circuit 31 Message reception and analysis circuit 32 Order expansion circuit 41 Monitoring information collection circuit 42 Monitoring information editing and transmission circuit

Claims (1)

[Claims] In a subscriber circuit accommodating an analog line or a digital line and comprising a plurality of line control function units and a line state monitoring unit, the subscriber circuit is controlled by a line control from a control unit of a higher-level device. Means for receiving the information in the form of a logical message, analyzing the contents of the logical message, controlling the line control function units, and converting the line state monitoring information from the line state monitoring units into a logical message format. Means for editing and transmitting the line status monitoring information in the form of the logical message to the control unit of the higher-level device.