JPH05276129A - Each calling start line multiplex transmitter - Google Patents

Abstract

PURPOSE:To provide an each start line multiplex transmitter by which the reduction of power consumption can be realized. CONSTITUTION:Only when a calling is generated from any line of plural multiplexed lines, a multiplex circuit 11, transmission path terminating circuit 12, and separator circuit 13 in a station side device 10, and a transmission path terminating circuit 31, separator circuit 32, and multiplex circuit 34 in a subscriber's side device 30, are started. When no calling is generated from any entire line, the multiplex circuit 11, transmission path terminating circuit 12, and separator circuit 13 in the station side device 10, and the transmission path terminating circuit 31, separator circuit 32, and multiplex circuit 34 in the subscriber's side device 30 are stopped, so that each calling start stoppage of a line multiplex transmitter can be realized. And also, a subscriber's signal multiplex separator circuit and a transmission path signal multiplex separator and logical conversion circuit corresponding to each subscriber's side device 30 are provided in the station side device 10, so that it is possible to flexibly cope with the increase of subscribers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber line transmission system for multiplexing a plurality of telephone lines or ISDN basic interface lines between a station side device and a subscriber side device for transmission. It is a call-initiated line multiplex transmission device that realizes activation and deactivation for each call of a subscriber side device.

[0002]

2. Description of the Related Art FIG. 7 is a block diagram showing an example of a conventional line multiplexing transmission device. The figure shows a case where n lines are multiplexed and transmitted. In FIG. 7, the transmission signal S _i , the incoming call activation control signal A _i , and the stop control signal D _i (i = 1, 1) of each line transmitted from the station side device 10 to the subscriber side device 30.
2, ..., N) are multiplexed by the multiplexing circuit 11 and input to the transmission line terminating circuit 12. The transmission line terminating circuit 12 converts the multiplexed signal into a transmission line signal and sends it to the subscriber transmission line 20.

In the subscriber side device 30, the subscriber transmission line 20
The transmission line signal received via the line is taken into the transmission line termination circuit 31, the separation circuit 32 separates the signal for each line, and the signal is sent to the interface circuits 331, 332, ..., 33n. Each interface circuit 33i (i = 1, 2, ...,
In n), when the incoming call activation control signal A _i is received, the interface circuit 33 i is activated, the transmission signal S _i transmitted from the station side device 10 is transmitted to the home device side, and the stop control signal D _i is transmitted. If received, the interface circuit 33i
Is stopped, that is, the transmission signal S _i to the home device side is stopped.
Here, starting and stopping of the interface circuit 33i
For example, it is realized by supplying or disconnecting power to the interface circuit 33i. It can also be realized by supplying or disconnecting the operation clock of the interface circuit 33i.

On the other hand, each interface circuit 33i (i =
1, 2, ..., N) receives the calling signal a _i from the home device side, activates the interface circuit 33 _i and sends the transmission signal R _i to the multiplexing circuit 34. Here, the detection of the calling signal a _i in the interface circuit 33 _i can be realized by a simple circuit such as a power detection circuit, and most of the circuits in the interface circuit 33 _i are stopped and the calling signal a _i is detected.
Can be detected. The multiplexing circuit 34 multiplexes the transmission signal R _i from each interface circuit 33 _i and sends it to the transmission line terminating circuit 31. The transmission line terminating circuit 31 converts the multiplexed signal into a transmission line signal and sends it to the subscriber transmission line 20. In the station side device 10, the transmission line signal received through the subscriber transmission line 20 is taken into the transmission line terminating circuit 12, the separation circuit 13 separates the signal for each line, and the signal from the subscriber side device 30 is taken. Take out R _i (i = 1, 2, ..., N). Here, the multiplexing circuit 11, the transmission line terminating circuit 12 and the separation circuit 13 in the station side device 10, the subscriber side device 3
The transmission line terminating circuit 31, the demultiplexing circuit 32, and the multiplexing circuit 34 in 0 are always operating regardless of whether each line is communicating or not communicating, and the interface circuit 33i (i , 1, 2, ..., N) are activated during communication and stopped during non-communication.

FIG. 8 shows an example of a start and stop sequence in a conventional line multiplex transmission device. Figure 8
8A shows an incoming call activation sequence, FIG. 8B shows an outgoing call activation sequence, and FIG. 8C shows a stop sequence. In these figures, the case where the number of multiplexed lines is 2 is shown. In FIG. 8A, an incoming call activation control signal A ₁ and a transmission signal S ₁ from the network side to the interface circuit 1-331 are sent to the subscriber via the multiplexing circuit 11 and the transmission line terminating circuit 12 in the station side device 10. It is sent to the transmission line 20. In the subscriber side device 30, the incoming call activation control signal A ₁ and the transmission signal S ₁ received via the subscriber transmission line 20 are taken in by the transmission line terminating circuit 31 and then from the separation circuit 32 to the interface circuit 1-. 331 is input. The interface circuit 1-331 in the stopped state is activated when receiving the incoming call activation control signal A ₁ , and is transmitted to the home device side with the transmission signal S ₁
To send. The home device recognizes that there is an incoming call by receiving S ₁ , and the interface circuit 1-331
The transmission signal R ₁ is transmitted to. The transmission signal R ₁ is transmitted to the subscriber transmission line 2 via the multiplexing circuit 34 and the transmission line terminating circuit 31.
0 is transmitted to the network side via the transmission line terminating circuit 12 and the separating circuit 13 in the opposite station side device 10, and the line 1 is brought into the communication state. Then, from the network side to the station side device 10
In the case of an incoming call activation control signal A ₂ and the transmission signal S ₂ is transmitted to an interface circuit 2-332, as in the case of activation of the interface circuit 1, a stopped state by the incoming call activation control signal A ₂ After the interface circuit 2-332 is activated, the transmission signal S ₂ from the network side and the transmission signal R ₂ from the home equipment side are transmitted, and the line 2 becomes in the communication state.

FIG. 8B shows a call initiation sequence, that is, a sequence when there is a request for activation from the home equipment side. The call signal a ₁ and the transmission signal R ₁ from the home equipment side are the interface circuits 1-331. To the call signal a, the interface circuit 1-331 in the stopped state transmits the call signal a.
_{When 1} is detected and activated, the transmission signal R ₁ is sent to the subscriber transmission line 20 via the multiplexing circuit 34 and the transmission line terminating circuit 31, and the transmission line terminating circuit 1
2, transmitted to the network side via the separation circuit 13. The network recognizes that a call is made by receiving the transmission signal R ₁ , and transmits the transmission signal S ₁ to the interface circuit 1-331 to the station side device 10. The transmission signal S ₁ is sent to the subscriber transmission line 20 via the multiplex circuit 11 and the transmission line terminating circuit 12, and the transmission line terminating circuit 31, the separating circuit 32, and the interface circuit 1-3 in the opposite subscriber side device 30.
It is transmitted to the home device side via 31 and the line 1 becomes in communication. After that, from the home equipment side, the interface circuit 2
When the calling signal a ₂ and the transmission signal R ₂ for the call are transmitted, the interface circuit 2-332 which has been in the stopped state is started by the calling signal a ₂ as in the case of starting the interface circuit 1. After that, the transmission signal R ₂ from the home equipment side and the transmission signal S ₂ from the network side are transmitted, and the line 2 is brought into a communication state.

FIG. 8C shows a stop sequence. It is assumed that the interface circuits 1-331 and the interface circuits 2-332 are activated and the transmission signals S ₁ and R ₁ and the transmission signals S ₂ and R ₂ are transmitted. When the stop control signal D ₁ for an interface circuit 1-331 is transmitted from the network side, the stop control signal D ₁ is the optical line terminal 1
0, which is sent to the subscriber transmission line 20 via the multiplex circuit 11 and the transmission line terminating circuit 12 to oppose the subscriber side device 3
At 0, it is transmitted to the interface circuit 1-331 via the transmission line terminating circuit 31 and the separating circuit 32. The interface circuit 1-331 stops when it receives the stop control signal D ₁ , and stops the transmission signal S ₁ that was being transmitted to the home device side. The home device recognizes the end of the communication when S ₁ stops, stops the transmission of the transmission signal R ₁ to the interface circuits 1-331, and the communication on the line 1 ends. After that, when the stop control signal D ₂ for the interface circuit 2-332 is transmitted from the network side, the interface circuit that was in the communication state by the stop control signal D ₂ is the same as the case of stopping the interface circuit 1-331. 2-3
32 is stopped, and the communication on the line 2 ends.

[0008]

In the conventional line multiplex transmission apparatus, a multiplexing circuit, a transmission line terminating circuit and a separating circuit in a station side device, a transmission line terminating circuit in a subscriber side device,
The demultiplexing circuit and the multiplexing circuit are always operating regardless of whether each line is communicating or not communicating, and only the interface circuit in the subscriber side device is activated during communication and stopped during non-communication. Specifically, the interface circuit receives and activates an incoming call activation control signal transmitted from the network side or an outgoing call signal transmitted from the home device, and receives the termination control signal transmitted from the network side to stop. .. As described above, in the conventional line multiplex transmission device, even when there is no call on all lines and non-communication is performed, the station side device and the subscriber side device other than the interface circuit are activated, and power equivalent to that during communication is provided. It had the drawback of consuming it. Further, in general, the subscriber side device is equipped with a battery as a power supply source at the time of a power failure, but it is necessary to supply the same electric power as the battery capacity during communication, and it is necessary to provide a large capacity battery. was there.

The present invention solves the above problems and provides a multiplexing circuit, a transmission line terminating circuit and a demultiplexing circuit in a station side device only when a call is present on any one of a plurality of multiplexed lines. , The subscriber side device activates the transmission line termination circuit, the separation circuit and the multiplexing circuit, and if there is no call on all lines, the station side device multiplex circuit, the transmission line termination circuit and the separation circuit, the subscriber side An object of the present invention is to provide a call initiation line multiplex transmission device capable of reducing power consumption by stopping a transmission line terminating circuit, a separation circuit and a multiplexing circuit in the device. Another object of the present invention is to provide a subscriber side device demultiplexing circuit corresponding to each subscriber side device and a transmission line signal demultiplexing / logic conversion circuit so that the station side device can flexibly cope with the increase in subscribers. ..

[0010]

In order to achieve these objects, the invention according to claim 1 provides a multiplexing circuit for multiplexing transmission signals of various lines and various control signals transmitted from the network side. A transmission line terminating circuit for converting the multiplexed transmission signal and various control signals into a transmission line signal and transmitting the transmission line signal and receiving a transmission line signal from an opposite subscriber side device; In a station side device provided with a separation circuit for separating a transmission line signal from a subscriber side device, a signal detection circuit for detecting a transmission line signal from an opposite subscriber side device, and a signal detection output of the signal detection circuit or When a control signal from a plurality of lines is received, a circuit in the station side device is activated, and when only one of the plurality of lines is communicating, when a stop control signal is received for the line. In the station side device A configuration in which a control circuit for controlling to stop the road.

Next, the invention according to claim 2 includes a plurality of interface circuits which oppose the station side device via a transmission path and which receives a control signal transmitted from the network side or the home equipment to start or stop the interface circuit. A multiplexing circuit for multiplexing transmission signals from the plurality of interface circuits, and transmission for converting the multiplexed transmission signals into transmission path signals and transmitting the signals and receiving transmission path signals from the station side device In the subscriber side device provided with a line terminating circuit and a separation circuit for separating the multiplexed transmission signal and various control signals from the station side device, the transmission line signal from the opposite station side device is detected. When the signal detection circuit and the detection signal of the signal detection circuit or the calling signal detection output of at least one circuit of the plurality of interface circuits is received, the call in the subscriber side device is detected. Activation and contrast signals from the station-side apparatus is a configuration in which a control circuit for controlling to stop the circuit of the subscriber unit if not detected by the signal detection circuit.

According to a third aspect of the present invention, in the call activation line multiplex transmission apparatus according to the first aspect, the demultiplexing circuit branches a signal addressed to itself from a multiplexed signal from the station side apparatus. The signal detection circuit is configured to include a means for outputting a signal detection output on the condition that the received transmission path signal includes a signal addressed to the own device.

According to a fourth aspect of the present invention, in the call activation line multiplex transmission apparatus according to the second aspect, the station side apparatus demultiplexes transmission signals and various control signals for the subscriber side apparatus. A subscriber signal demultiplexing circuit and demultiplexing transmission signals for a plurality of subscriber side devices at least 1.
When an incoming call activation control signal is received on one line, an activation request signal is sent to the control circuit, and when only one of all multiplexed lines is communicating, a stop control signal from that line A transmission line signal demultiplexing / logic conversion circuit for transmitting a stop request signal to the control circuit, and a start request signal from the transmission line signal demultiplexing / logic conversion circuit,
This is a configuration including a control circuit that controls to start or stop the transmission line termination circuit when the stop request signal and the detection signal of the signal detection circuit are received.

[0014]

According to the present invention, the multiplexing circuit, the transmission line terminating circuit and the separating circuit in the station side device, the transmission line terminating circuit in the subscriber side device, only when there is a call on any one of a plurality of multiplexed lines, When the separation circuit and the multiplexing circuit are activated and there is no call on all lines, the multiplexing circuit in the station side device, the transmission line termination circuit and separation circuit, the transmission line termination circuit in the subscriber side device, the separation circuit, the multiplexing circuit By stopping the call, the start / stop of each call of the line multiplex transmission device is realized. As a result, the power consumption of the line multiplex transmission device and the battery capacity of the subscriber side device can be significantly reduced. Further, the station side device is provided with a subscriber signal demultiplexing circuit corresponding to each subscriber side device and a transmission line signal demultiplexing / logic conversion circuit, so that it is possible to flexibly cope with an increase in the number of subscribers.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of claims 1 and 2 of the present invention. In the figure, in the station-side device 10 and the subscriber-side device 30, components of the conventional device shown in FIG.

In the present configuration, the station side device is multiplexed via a transmission line 20 with a multiplexing circuit 11 for multiplexing transmission signals of a plurality of lines, an incoming call activation control signal and a termination control signal transmitted from the network side. A transmission line terminating circuit 12 for converting the transmission signal, the incoming call start control signal and the stop control signal into a transmission line signal and transmitting the transmission line signal, and receiving the transmission line signal from the opposite subscriber side device 30; Circuit 13 for separating the multiplexed transmission signals from the subscriber and the opposing subscriber side device 3
0, a signal detection circuit 14 for detecting a transmission line signal, a signal detection output S _det of the signal detection circuit, and an incoming call start control signal A _i and a stop control signal D for a plurality of lines.
_{When i} (i = 1, 2, ..., N) is input and the signal detection output S _det is received or the incoming call activation control signal A _i is received in at least one of a plurality of lines, the multiplexing is performed. The circuit, the demultiplexing circuit and the transmission line terminating circuit are activated, and when only one of the plurality of lines receives the stop control signal D _i for the line during communication, the multiplexing circuit, the demultiplexing circuit, and A control circuit 15 for controlling to stop the transmission line terminating circuit is provided, and the subscriber side device is activated by receiving an incoming call activation control signal transmitted from the network side or a calling signal transmitted from the home device. An interface circuit 33i (i = 1, 2, ..., N) that receives and stops the stop control signal transmitted from the network side, a multiplexing circuit 34 that multiplexes a transmission signal from the interface circuit, and a transmission path Many from multiple circuits A transmission line terminating circuit 31 for converting a duplicated transmission signal into a transmission line signal and transmitting the transmission line signal, and receiving a transmission line signal from a station side device, a multiplexed transmission signal from the transmission line terminating circuit 31, and start control Separation circuit 32 for separating the signal and stop control signal, signal detection circuit 35 for detecting the transmission path signal from the opposite station side device, detection signal S _det of said signal detection circuit and calling from a plurality of interface circuits Signal detection output a _idet (i = 1, 2, ..., N)
When the detection signal S _det of the signal detection circuit is received or the calling signal detection output is received for at least one of the plurality of interface circuits, the multiplexer circuit, the separation circuit, and the transmission line termination circuit are A control circuit 36 is provided which is activated and controls so as to stop the multiplexing circuit, the separation circuit and the transmission line terminating circuit when the signal from the one-station device is not detected by the signal detection circuit.

Here, the multiplexing circuit 1 in the station side device 10
1, a transmission line termination circuit 12 and a separation circuit 13, a transmission line termination circuit 31, a separation circuit 32 in the subscriber side device 30,
The multiplexing circuit 34 and the interface circuit 33i (i =
1, 2, ..., N) is activated during communication of any of the multiplexed lines and stopped during non-communication. In addition, the signal detection circuit 14 and the control circuit 15 in the station side device 10,
The signal detection circuit 35 and the control circuit 36 in the subscriber side device 30 always operate regardless of whether they are in communication or not.

FIG. 3 shows an example of the starting and stopping sequence in such a configuration. Figure 3 (a)
Shows an incoming call activation sequence, FIG. 3 (b) shows an outgoing call activation sequence, and FIG. 3 (c) shows a stop sequence. In these figures, the interface circuit 1 and the interface circuit 2 are shown to be started and stopped, respectively.

In FIG. 3 (a), when the incoming call to the interface circuit 1-331 is activated, the incoming call activation control signal A ₁ and the transmission signal S ₁ to the interface circuit 1-331 are transmitted from the network side to the station side device 10. .. Here, the logical condition L _{1 for} the control circuit 15 in the station side device 10 to activate the multiplexing circuit 11, the demultiplexing circuit 13, and the transmission line terminating circuit 12.
Is as follows. L ₁ = S _det + A ₁ + A ₂ + ... + A _n (1) where +: logical sum

In this case, A ₁ = 1, S _det = 0, A ₁ =
Since A ₂ = ... = A _n = 0, the stopped multiplex circuit 11, separation circuit 13 and transmission line termination circuit 12 are activated, and the incoming call activation control signal A ₁ and transmission signal S ₁ are multiplexed circuit 11 , Subscriber transmission line 20 via transmission line termination circuit 12
Sent to. In the subscriber side device 30, the subscriber transmission line 20
The incoming call activation control signal A ₁ and the transmission signal S ₁ received via the are input to the transmission line termination circuit 31 and the signal detection circuit 35. The signal detection circuit 3 in the subscriber side device 30
When a signal is input to 5, the detection signal S _det is _sent to the control circuit 36.
Output to. The signal detection circuit 35 can be realized by a simple circuit such as a power detection circuit. Subscriber side device 3
The control circuit 36 in 0 is the transmission line terminating circuit 31, the separation circuit 3
2 and the logical condition L ₂ for activating the multiplexing circuit 34 is as follows. _{L 2 = S det + a 1det} + a 2det + ... + a ndet (2) However, +: logical sum

In this case, S _det = 1 and a _1det = a _2det =
... = a _ndet = 0, the transmission line termination circuit 31, the separation circuit 32, and the multiplexing circuit 34, which have been stopped, are activated,
The incoming call activation control signal A ₁ and the transmission signal S ₁ are transmitted to the interface circuit 1 via the transmission line terminating circuit 31 and the separation circuit 32.
-331 is input. The interface circuit 1-331 in the stopped state is activated when receiving the incoming call activation control signal A ₁ , and transmits the transmission signal S ₁ to the home device side. The home device recognizes that there is an incoming call by receiving S _1, and transmits the transmission signal R to the interface circuit 1-331.
Send ₁ The transmission signal R ₁ is sent to the subscriber transmission line 20 via the multiplexing circuit 34 and the transmission line terminating circuit 31, and is transmitted to the network side via the transmission line terminating circuit 12 and the demultiplexing circuit 13 in the opposite station side device 10. Communication is set. After that, the interface circuit 2-3 is sent from the network side to the station side device 10.
Incoming call activation control signal A ₂ and transmission signal S ₂ for 32
Is transmitted, the multiplexing circuit 11, the separation circuit 13, the transmission line termination circuit 12 in the station side device 10, and the transmission line termination circuit 31, the separation circuit 3 in the subscriber side device 30 have already been transmitted.
2. Since the multiplex circuit 34 is activated by the incoming call activation to the interface circuits 1-331, the incoming call activation control signal A ₂ and the transmission signal S ₂ are similar to the sequence of the prior art shown in FIG. Is the multiplex circuit 1 in the station side device 10.
1, sent to the subscriber's transmission line 20 via the transmission line terminating circuit 12, and via the transmission line terminating circuit 31 and the separating circuit 32 in the opposite subscriber side device 30, the interface circuit 1-3
Is input to 31, after the interface circuit 2-332 which was stopped by the incoming call activation control signal A ₂ is started, the transmission signal R ₂ from the transmission signal S ₂ and the home equipment side from the network side is transmitted Communication is set.

FIG. 3B shows a call initiation sequence, that is, a sequence when there is a request for activation from the home equipment side. The call signal a ₁ and the transmission signal R ₁ from the home equipment side are interface circuits 1-331. Is transmitted to the control circuit 36, the interface circuit 1-331 in the stopped state is activated and the calling signal detection output a _1det is output to the control circuit 36. At this time, the subscriber-side device 30 expressed by the equation (2)
The internal control circuit 36 is a transmission line terminating circuit 31, a separation circuit 32.
Since the logical condition L ₂ for activating the multiplex circuit 34 is satisfied, the transmission line terminating circuit 31 and the separation circuit 32 which have been stopped.
And the multiplexing circuit 34 is activated, and the transmission signal R ₁ is transmitted to the subscriber transmission line 20 via the multiplexing circuit 34 and the transmission line terminating circuit 31.
Sent to. In the opposite station side device 10, the transmission signal R ₁ received via the subscriber transmission line 20 is input to the transmission line termination circuit 12 and the signal detection circuit 14. When a signal is input to the signal detection circuit 14 in the subscriber side device 10, the detection signal S _det is output to the control circuit 15. Here, the signal detection circuit 14 can be realized by a simple circuit such as a power detection circuit. At this time, since the control circuit 15 in the subscriber side device 10 shown in the equation (1) activates the logical condition L ₁ for activating the transmission line terminating circuit 12, the demultiplexing circuit 13, and the multiplexing circuit 11, the transmission which has been stopped The line termination circuit 12, the separation circuit 13 and the multiplexing circuit 11 are activated, and the transmission signal R ₁ is transmitted to the network side via the transmission line termination circuit 12 and the separation circuit 13. The network recognizes that a call is made by receiving the transmission signal R ₁ , and transmits the transmission signal S ₁ to the interface circuit 1-331 to the station side device 10. The transmission signal S ₁ is sent out to the subscriber transmission line 20 via the multiplexing circuit 11 and the transmission line terminating circuit 12, and the transmission line terminating circuit 31, the separating circuit 32, and the interface circuits 1-331 in the opposite subscriber side device 30. The data is transmitted to the home device side via the communication device and enters the communication state. After that, when the calling signal a ₂ and the transmission signal R ₂ are transmitted from the home device side to the interface circuit 2, the transmission line terminating circuit 3 in the subscriber side device 30 has already been transmitted.
1, separation circuit 32, multiplexing circuit 34, and station side device 10
Inside, multiplex circuit 11, separation circuit 13, transmission line termination circuit 12
Has been activated by calling activation of the interface circuit 1-331, the interface circuit 2-332 which has been in a stopped state by the calling signal a ₂ is activated as in the sequence of the conventional technique shown in FIG. 8B. Transmission signal R
₂ is sent to the subscriber transmission line 20 via the multiplexing circuit 34 and the transmission line terminating circuit 31 in the subscriber side device 30, and the transmission line terminating circuit 12 and the demultiplexing circuit 1 are provided in the opposite station side device 10.
3 is transmitted to the network side, and the network receives the transmission signal R ₂ and then transmits the transmission signal S ₂ to the interface circuit 2-332 to enter the communication state.

FIG. 3C shows the stop sequence. The interface circuits 1-331 and the interface circuits 2-332 are activated, and the transmission signals S ₁ , R ₁ ,
And the transmission signals S ₂ and R ₂ are transmitted. When the stop control signal D ₁ for the interface circuits 1-331 is transmitted from the network side, the stop control signal D ₁ is input to the multiplexing circuit 11 and the control circuit 15 in the station side device 10. Here, the condition that the control circuit 15 in the station side device 10 stops the multiplexing circuit 11, the demultiplexing circuit 13, and the transmission line terminating circuit 12 is that only one of the multiple lines is multiplexed during communication. To receive the stop control signal D ₁ . In this case, the interface circuit 1-331
Since the two lines of the interface circuit 2-332 and the interface circuit 2-332 are communicating, the control circuit 15 includes the multiplex circuit 11 and the separation circuit 1.
3 and the transmission line termination circuit 12 are not stopped. Whether or not each line is in communication can be easily detected by monitoring the transmission signals S ₁ and R ₁ of each line in the control circuit 15. As a result, the stop control signal D ₁ is transmitted to the subscriber transmission line 20 via the multiplexing circuit 11 and the transmission line terminating circuit 12.
And is transmitted to the interface circuit 1-331 via the transmission line terminating circuit 31 and the separating circuit 32 in the opposing subscriber side device 30. Interface circuit 1-3
31 receives the stop control signal D ₁ and stops, and stops the transmission signal S ₁ that was being transmitted to the home device side. The home device recognizes the end of communication when S ₁ stops, and stops transmitting the transmission signal R ₁ to the interface circuits 1-331. Then, from the network side, the interface circuit 2-3
When the stop control signal D ₂ for 32 is transmitted,
As in the case of stopping the interface circuit 1, the stop control signal D ₂ is input to the multiplexing circuit 11 and the control circuit 15 in the station side device 10. In this case, since the interface circuits 1-331 have already stopped and only the interface circuits 2-332 are in communication, the control circuit 15 stops the multiplex circuit 11, the separation circuit 13, and the transmission line termination circuit 12. As a result, the output from the transmission line terminating circuit 12 to the subscriber transmission line 20 is stopped. Opposite subscriber side device 3
When the signal from the station side device 10 is stopped at 0, the signal detection circuit output S _{det of the} signal detection circuit 35 is not input to the control circuit 36. The control circuit 36 outputs the signal detection circuit output S
_{When det} is no longer input, the multiplexing circuit 34 and the separation circuit 3
2. Stop the transmission line termination circuit 31. As a result, the transmission signal S ₂ from the separation circuit 32 to the interface circuit 2-332 is cut off, and the interface circuit 2-started up
332 stops, and the output S ₂ from the interface circuit 2-332 to the home device side stops. The home device recognizes the end of communication due to the stop of S ₁ , and stops the transmission of the transmission signal R ₂ to the interface circuit 2-332.
Communication ends.

FIG. 2 is a block diagram showing a third embodiment of the present invention. The figure shows a case where two subscriber side devices are connected to a station side device via a branch type transmission line.
In this configuration, unlike the block configuration diagram of the first embodiment of the present invention shown in FIG. 1, the branch type transmission line 2 facing the station side device 10 is provided.
Two subscriber-side devices 30 and 40 having the same configuration as in the first embodiment are connected via 1. In such a configuration, since one transmission line is shared by a plurality of subscriber side devices, the station side device time-division-multiplexes and transmits the transmission signals addressed to each subscriber side device. The side device is configured to separate the transmission signal addressed to itself from the transmission signal distributed in a broadcast manner. Further, the transmission signal transmitted from each subscriber side device is multiplexed by sending out to the transmission path at a predetermined timing under the control of the station side device, and the transmission signal from each subscriber side device is transmitted at the station side device. Is configured to be separated. As a multiplexing method,
Besides, wavelength division multiplexing or the like is used.

In the station side device 10, the multiplexing circuit 11 transmits the transmission signals S ₁₁ , S ₁₂ , ..., S _1n , S ₂₁ , S for the subscriber side device 30 and the subscriber side device 40 transmitted from the network side.
₂₂ ..., S _2n , incoming call activation control signals A ₁₁ , A ₁₂ ,.
A _1n , A ₂₁ , A ₂₂ , ... A _2n and stop control signals D ₁₁ , D
_{12, ..., D 1n, D} 21, D 22, ..., comprising means for multiplexing the D _2n, the transmission signal R _11, which are multiplexed from the subscriber unit 30 and a subscriber unit 40 is separated circuits R ₁₂ ,…,
Means for separating R _1n , R ₂₁ , R ₂₂ , ..., R _2n are provided.

In the subscriber unit 30, the separation circuit 32
Is the multiplexed subscriber side device 30 from the station side device 10 and
And the transmission signal S to the subscriber side device 40₁₁, S₁₂，
…, S_1n, S_{twenty one}, S_{twenty two},…, S_2n, Incoming call activation control signal A
₁₁, A₁₂,…, A_1n, A_{twenty one}, A_{twenty two},…, A_2nAnd stop
Control signal D₁₁, D₁₂, ..., D_1n, D_{twenty one}, D_{twenty two}, ..., D_2n
Transmission signal S addressed to itself₁₁, S₁₂,…, S_1n, Incoming call activation
Control signal A₁₁, A₁₂,…, A_1nAnd stop control signal
D₁₁, D₁₂, ..., D_1nSignal detection including means for separating
The circuit is self-contained within the received transmission path signal from the station side device 10.
Transmission signal S addressed to₁₁, S ₁₂,…, S_1n, Incoming call activation control signal
A₁₁, A₁₂,…, A_1nAnd stop control signal D₁₁, D₁₂，
…, D_1nThe signal detection output is output on the condition that
Equipped with means to exert.

In the subscriber side device 40, as in the subscriber side device 30, the separating circuit 42 transmits the transmission signals S ₁₁ , from the station side device 10 to the multiplexed subscriber side device 30 and the subscriber side device 40. S ₁₂ , ..., S _1n , S ₂₁ , S ₂₂ ,.
S _2n , incoming call activation control signals A ₁₁ , A ₁₂ , ..., A _1n , A ₂₁ ,
A _22, ..., A _2n and stop control signals _{D 11, D 12, ...,} D
_{1n, D 21, D 22,} ..., the transmission signal S ₂₁ self-addressed from D _2n,
S _22, ..., S _2n, called activation control signal _{A 21, A 22, ...,} A
_2n and stop control signals D ₂₁ , D ₂₂ , ..., D _2n are separated, and the signal detection circuit includes the transmission signals S ₂₁ , S ₂₂ addressed to itself in the received transmission path signal from the station side device 10. ，… ，
S _2n, called activation control signal _{A 21, A 22, ...,} A 2n and stop control signals D _21, D _22, ..., comprising means for outputting a signal detection output on condition that it contains D _2n ..

Here, the multiplexing circuit 1 in the station side device 10
1, a transmission line termination circuit 12 and a separation circuit 13, a transmission line termination circuit 31, a separation circuit 32 in the subscriber side device 30,
The multiplexing circuit 34 and the interface circuit 33i (i =
, 1, ..., N), the transmission line terminating circuit 41, the demultiplexing circuit 42, the multiplexing circuit 44, and the interface circuit 43i (i = 1, 2, ..., N) in the subscriber side device 40 are of the multiplexed line. One of the lines starts during communication and stops during non-communication. The signal detection circuit 14 and control circuit 15 in the station side device 10, the signal detection circuit 35 and control circuit 36 in the subscriber side device 30, and the subscriber side device 40.
The signal detection circuit 45 and the control circuit 46 in 2 always operate regardless of whether they are in communication or not.

FIG. 4 shows an example of the starting and stopping sequence in such a configuration. FIG. 4A shows an incoming call activation sequence, FIG. 4B shows an outgoing call activation sequence, and FIG. 4C shows a stop sequence. In these figures, the interface circuit 11 of the subscriber device 30 is shown.
And the case where the interface circuit 21 of the subscriber side device 40 is started and stopped, respectively.

In FIG. 4 (a), at the time of the incoming call activation to the interface circuit 11-331 of the subscriber side device 30, the incoming call activation control signal A ₁₁ and the transmission signal S ₁₁ to the interface circuit 11-331 are transmitted from the network side to the station side. Device 10
Sent to. Here, the control circuit 15 in the station side device 10 controls the multiplexing circuit 11, the demultiplexing circuit 13, and the transmission line terminating circuit 12
The logical condition L ′ ₁ for activating is as follows. _{L '1 = S det + A} 11 + A 12 + ... + A 1n + A 21 + A 22 + ... + A 2n (3) where +: logical OR

In this case, A ₁₁ = 1, S _det = 0, A ₁₂ =
_{... = A 1n = A 21 =} A 22 = ... = for a A _2n = 0, multiplexer 11 that has been stopped, the separation circuit 13 and line termination circuit 12 is activated, the incoming call activation control signal A ₁₁ and The transmission signal S ₁₁ is sent to the subscriber transmission line 21 via the multiplexing circuit 11 and the transmission line terminating circuit 12, and is input to the subscriber side device 30 and the subscriber side device 40. In the subscriber side device 40, the incoming call activation control signal A ₁₁ and the transmission signal S ₁₁ received via the subscriber transmission line 21 are input to the transmission line termination circuit 41 and the signal detection circuit 45. A signal is input to the signal detection circuit 45 in the subscriber side device 40, and the incoming call activation control signal A ₂₁ and the transmission signal S ₂₁ addressed to itself are included in the received signal.
_Therefore , the detection signal S _det is not output, and the subscriber side device 40 remains in the stopped state. On the other hand, the subscriber device 30
Then, the incoming call activation control signal A ₁₁ and the transmission signal S ₁₁ received via the subscriber transmission line 21 are input to the transmission line termination circuit 31 and the signal detection circuit 35. When a signal is input to the signal detection circuit 35 in the subscriber side device 30, after recognizing that the incoming signal includes the incoming call activation control signal A ₁₁ and the transmission signal S ₁₁ , the detection signal S _det Is output to the control circuit 36. Here, the signal detection circuit 35 can be realized by including a circuit that detects a signal addressed to the own device at a predetermined position in the reception frame. Here, the control circuit 36 in the subscriber side device 30 activates the transmission line terminating circuit 31, the demultiplexing circuit 32, and the multiplexing circuit 34 under the logical condition L '.
₂ is as follows. L ′ ₂ = S _det + a _11det + a _12det + ... + a _1ndet (4) where, +: logical sum

In this case, S _det = 1 and a _11det = a
_{Since 12det} = ... = a _1ndet = 0, the stopped transmission line termination circuit 31, separation circuit 32, and multiplexing circuit 34 are activated, and the incoming call activation control signal A ₁₁ and transmission signal S ₁₁
Is input to the interface circuit 1-331 via the transmission line terminating circuit 31 and the separating circuit 32. The interface circuit 1-331 in the stopped state receives the incoming call activation control signal A ₁₁
Is started, the transmission signal S ₁₁ is transmitted to the home device side. The in-home device recognizes that there is an incoming call by receiving S ₁₁ , and transmits the transmission signal R ₁₁ to the interface circuits 1-331. The transmission signal R ₁₁ is the multiplex circuit 3
4, sent to the subscriber transmission line 21 via the transmission line terminating circuit 31, and transmitted to the network side via the transmission line terminating circuit 12 and the separating circuit 13 in the opposite station side device 10 to enter the communication state. After that, when the incoming call activation control signal A ₂₁ and the transmission signal S ₂₁ to the interface circuit 2-332 of the subscriber side device 40 are transmitted from the network side to the station side device 10, the inside of the station side device 10 has already been transmitted. Multiplexing circuit 11, separation circuit 1
3 and the transmission line terminating circuit 12 are activated by the incoming call activation of the interface circuit 11-331 of the subscriber side device 30, the incoming call activation control signal A ₂₁ and the transmission signal S ₂₁ are stored in the station side device 10. It is sent to the subscriber transmission line 21 via the multiplex circuit 11 and the transmission line termination circuit 12, and the transmission line termination circuit 31 and the separation circuit 3 in the opposite subscriber side device 40.
2 is input to the interface circuit 21-431 and the incoming call activation control signal A ₂₁ activates the interface circuit 21-431 in the stopped state, and then the transmission signal S ₂₁ from the network side is transmitted to the home device side. Sent. The home device recognizes that there is an incoming call by receiving S ₂₁ ,
The transmission signal R _{21 is} transmitted to the interface circuit 21-431.
To send. The transmission signal R ₂₁ is sent to the subscriber transmission line 21 via the multiplexing circuit 44 and the transmission line terminating circuit 41, and is transmitted to the network side via the transmission line terminating circuit 12 and the demultiplexing circuit 13 in the opposite station side device 10. Communication is set.

FIG. 4B shows a call initiation sequence, that is, a sequence when there is a request for activation from the home equipment side. The call origination signal a ₁₁ and the transmission signal R ₁₁ are sent from the home equipment side to the subscriber side device 30. Interface circuit 11-331 that was in the stopped state
When 1-331 is activated, a calling signal detection output a _11det is output to the control circuit 36. At this time, formula (4)
Since the control circuit 36 in the subscriber side device 30 shown in FIG. 3 satisfies the logical condition L ′ ₂ for activating the transmission line termination circuit 31, the separation circuit 32 and the multiplexing circuit 34, the transmission line termination circuit 31, which has been stopped, The separation circuit 32 and the multiplexing circuit 34 are activated, and the transmission signal R ₁₁ is transmitted to the multiplexing circuit 34 and the transmission line terminating circuit 3
1 to the subscriber transmission line 21. In the opposite station device 10, the transmission signal R ₁₁ received via the subscriber transmission line 21 is transmitted to the transmission line termination circuit 12 and the signal detection circuit 1.
Input to 4. When a signal is input to the signal detection circuit 14 in the subscriber side device 10, the detection signal S _det is output to the control circuit 15. Here, the signal detection circuit 14 can be realized by a simple circuit such as a power detection circuit. At this time, the control circuit 15 in the subscriber side device 10 expressed by the equation (3) is stopped because the logical condition L' ₁ for activating the transmission line termination circuit 12, the separation circuit 13 and the multiplexing circuit 11 is satisfied. Transmission line termination circuit 12, separation circuit 13 and multiplexing circuit 11
Is started, and the transmission signal R ₁₁ is transmitted to the network side via the transmission line terminating circuit 12 and the separating circuit 13. The network transmits the transmission signal R ₁₁
It is recognized that a call is made by receiving the transmission signal, and the transmission signal S ₁₁ to the interface circuits 11-331 is transmitted to the station side device 10. The transmission signal S ₁₁ is a multiplex circuit 11,
It is sent to the subscriber transmission line 21 via the transmission line terminating circuit 12, and in the opposite subscriber side device 30, the transmission line terminating circuit 31, the separation circuit 32, and the interface circuit 11-331.
Is transmitted to the home device side via the, and enters the communication state. After that, when the calling signal a ₂₁ and the transmission signal R ₂₁ are transmitted from the home device side to the interface circuit 21-431 of the subscriber side device 40, the operation is stopped as in the case of the subscriber side device 30. The interface circuit 21-431, the transmission line terminating circuit 41, the separation circuit 42 and the multiplexing circuit 44 are activated, and the transmission signal R ₂₁ is sent to the subscriber transmission line 21 via the multiplexing circuit 44 and the transmission line terminating circuit 41. It In the opposite station device 10, the multiplex circuit 11 in the station device 10,
Since the separation circuit 13 and the transmission line terminating circuit 12 are activated by the call activation to the interface circuit 11-331, the transmission signal R ₂₁ is transmitted to the transmission line terminating circuit 12 and the separation circuit 13.
Is transmitted to the network side via. The network recognizes that a call is made by receiving the transmission signal R ₂₁ , and the station side device 10
The transmission signal S to the interface circuit 21-431
Send ₂₁ . The transmission signal S ₂₁ is sent to the subscriber transmission line 21 via the multiplex circuit 11 and the transmission line terminating circuit 12, and the transmission line terminating circuit 41, the separation circuit 42, and the interface circuits 21-431 in the opposite subscriber side device 40. The data is transmitted to the home device side via the communication device and enters the communication state.

FIG. 4C shows the stop sequence. The interface circuits 11-331 and the interface circuits 21-432 are activated, and the transmission signals S ₁₁ , R are transmitted.
₁₁ and the transmission signals S ₂₁ and R ₂₁ are transmitted. When the stop control signal D ₁₁ for the interface circuit 11-331 is transmitted from the network side, multiplexing circuit 11 and the control circuit 15 in the stop control signal D ₁₁ is the optical line terminal 10
Entered in. Here, the control circuit 15 in the station side device 10 controls the multiplexing circuit 11, the demultiplexing circuit 13, and the transmission line terminating circuit 12
Is to receive the stop control signal D _ij for the line while only one line is communicating among the multiple lines. In this case, the interface circuit 11-
Since the two lines of 331 and the interface circuit 21-431 are in communication, the control circuit 15 does not control the stop of the multiplex circuit 11, the separation circuit 13 and the transmission line termination circuit 12. Whether or not each line is in communication can be easily detected by monitoring the transmission signals S _ij and R _ij of each line in the control circuit 15. As a result, the stop control signal D ₁₁
Is sent to the subscriber transmission line 21 through the multiplex circuit 11 and the transmission line terminating circuit 12, and is input to the opposing subscriber side device 30 and subscriber side device 40. In the subscriber side device 30, the stop control signal D ₁₁ is transmitted to the interface circuit 11-331 via the transmission line terminating circuit 31 and the separating circuit 32. The interface circuit 11-331 stops when it receives the stop control signal D ₁₁ , and stops the transmission signal S ₁₁ that has been transmitted to the home device side. The home device recognizes the end of communication due to the stop of S ₁₁ , and the interface circuit 1
Transmission of transmission signal R _{11 to} 1-331 is stopped, and line 1
Communication ends. As a result, all the interface circuits of the subscriber side device 30 are stopped, the transmission signals S _ij and R _ij to the subscriber side device 30 are lost, and the signal detection circuit 3
When the output S _{det of} 5 becomes 0, the transmission line terminating circuit 31, the separating circuit 32, and the multiplexing circuit 34 which have been activated by the control of the control circuit 36 are stopped. On the other hand, the stop control signal D ₁₁ is also input to the subscriber side device 40, but since the separation circuit 42 separates only the signal addressed to itself, the stop control signal D ₁₁ is input to the interface circuits 21-431. The communication on the line 2 continues. Then, when the stop control signal D ₂₁ from the network side for the interface circuit 2-332 is transmitted in the case of stopping of the interface circuit 11 as well as stop control signal D ₂₁ multiplex circuit 11 and the control in the optical line terminal 10 It is input to the circuit 15. In this case, since the interface circuit 11-331 has already stopped and only the interface circuit 21-431 is communicating, the control circuit 15 controls the multiplex circuit 11 and the demultiplexing circuit 13.
And the transmission line termination circuit 12 is stopped. As a result, the output from the transmission line terminating circuit 12 to the subscriber transmission line 21 is stopped. When the signal from the station side device 10 is stopped in the facing subscriber side device 40, the signal detection circuit output S _{det of the} signal detection circuit 45 is not input to the control circuit 46. The control circuit 46 stops the multiplexing circuit 44, the separation circuit 42, and the transmission line termination circuit 41 when the signal detection circuit output S _det is no longer input. As a result, the transmission signal S ₂₁ from the separation circuit 42 to the interface circuit 21-431 is cut off, the activated interface circuit 21-431 is stopped, and the output S ₂₁ from the interface circuit 21-431 to the home device side is stopped.
Stops. The home device recognizes the end of the communication when S ₁₁ stops, stops the transmission of the transmission signal R ₂₁ to the interface circuits 21-431, and ends the communication.

FIG. 5 is a block diagram showing a fourth embodiment of the present invention. In this configuration, unlike the block configuration diagram of the second embodiment of the present invention shown in FIG. 2, the station side device 1
0 includes a subscriber signal demultiplexing circuit 16, a subscriber signal demultiplexing circuit 17, and a transmission line signal demultiplexing / logic conversion circuit 18. Subscriber side device 30 and subscriber side device 4
The configuration of 0 is the same as the block configuration diagram of the second embodiment of the present invention shown in FIG.

In the station side device 10, the subscriber signal demultiplexing circuit 16 transmits the transmission signals S ₁₁ , S ₁₂ , ..., S _1n to the subscriber side device 30 transmitted from the network side, the incoming call activation control signal A ₁₁ , A ₁₂ , ..., A _1n and stop control signals D ₁₁ , D ₁₂ ,
, D _1n are multiplexed to separate the multiplexed transmission signals R ₁₁ , R ₁₂ , ..., R _1n from the subscriber side device 30, and the subscriber signal demultiplexing circuit 17 is transmitted from the network side. The transmission signals S ₂₁ , S ₂₂ , ...
_2n, called activation control signal _{A 21, A 22, ...,} A 2n and stop control signals D _21, D _22, ..., the transmission signal R _21, which are multiplexed from the subscriber unit 40 multiplexes the D _2n, R _22, ..., R _2n
And means for separating. The transmission path signal demultiplexing / logic conversion circuit 18 is provided for the subscriber signal demultiplexing circuit 16 and the subscriber signal demultiplexing circuit 17 for multiplexed transmission signals for each subscriber, incoming call start control signal and stop control signal. Are multiplexed and transmitted to the transmission line terminating circuit 12, and the transmission line terminating circuit 1
The multiplexed transmission signal from 2 is demultiplexed for each subscriber and sent to the subscriber signal demultiplexing circuit 16 and the subscriber signal demultiplexing circuit 17, and at least one of all multiplexed lines. When the incoming call activation control signal from the network side is received on the line, the activation request signal A is sent to the control circuit 15.
When a stop control signal is sent from the network side to the circuit while sending out CT and only one of all multiplexed lines is communicating, the stop request signal DEACT to the control circuit 15 Is provided. The control circuit 15
The activation request signal ACT and the stop request signal DEACT from the transmission line signal demultiplexing / logic conversion circuit 18 and the activation request signal ACT from the transmission line signal demultiplexing / logic conversion circuit 18 are input to the detection signal S _det of the signal detection circuit 14. Alternatively, when the detection signal S _det of the signal detection circuit 14 is received, the transmission line terminating circuit 12 is activated and the transmission line signal demultiplexing / demultiplexing
When the stop request signal DEACT from the logic conversion circuit 18 is received, a means for controlling the transmission line termination circuit 12 to stop is provided.

Here, the transmission line terminating circuit 12 in the station side device 10 and the transmission line terminating circuit 3 in the subscriber side device 30.
1, separation circuit 32, multiplexing circuit 34, interface circuit 33i (i = 1, 2, ..., N), subscriber side device 40
Of the transmission line termination circuit 41, the separation circuit 42, the multiplexing circuit 44, and the interface circuit 43i (i = 1, 2,
, N), one of the multiplexed lines starts up during communication and stops during non-communication. The signal detection circuit 14, the control circuit 15, the subscriber signal demultiplexing circuit 16, the subscriber signal demultiplexing circuit 17, the transmission line signal demultiplexing / logic conversion circuit 18, and the subscriber side device 3 in the station side device 10
The signal detection circuit 35 and the control circuit 36 at 0 and the signal detection circuit 45 and the control circuit 46 at the subscriber side device 40 always operate regardless of whether they are communicating or not communicating.

FIG. 6 shows an example of the starting and stopping sequence in such a configuration. Figure 6 (a)
Shows an incoming call activation sequence, FIG. 6 (b) shows an outgoing call activation sequence, and FIG. 6 (c) shows a stop sequence. In these figures, the interface circuit 11 of the subscriber device 30 is shown.
And the case where the interface circuit 21 of the subscriber side device 40 is started and stopped, respectively.

In FIG. 6 (a), when the subscriber side device 30 receives an incoming call to the interface circuit 11-331, the incoming call start control signal A ₁₁ and the transmission signal S ₁₁ from the network side to the interface circuit 11-331 are transmitted to the station side. Device 10
Sent to. Here, the logical condition L _{3 at} which the transmission path signal demultiplexing / logical conversion circuit 18 in the station side device 10 transmits the activation request signal ACT is as follows. _{L 3 = A 11 + A 12} + ... + A 1n + A 21 + A 22 + ... + A 2n (5) where +: logical OR In this _{case, A 11 = 1, A 12} = ... = A 1n = A 21 = A 22 = …
Since = A _2n = 0, L ₃ = 1 and ACT is output to the control circuit 15. The control circuit 15 is the transmission line termination circuit 1
The logical condition L ₄ for activating 2 is as follows. L ₄ = S _det + ACT (6) Here, +: logical sum In this case, S _det = 0 and ACT = 1, so L ₄ =
The transmission line terminating circuit 12, which has become 1 and stopped, is activated,
The incoming call activation control signal A ₁₁ and the transmission signal S ₁₁ are transmitted via the subscriber signal demultiplexing circuit 16, the transmission line signal demultiplexing / logic conversion circuit 18 and the transmission line terminating circuit 12 to the subscriber transmission line 2.
1 to the subscriber side device 30 and the subscriber side device 4
Input to 0. The subsequent sequence is the same as the incoming call activation sequence of the second embodiment of the present invention shown in FIG.

FIG. 6B is a call initiation sequence, that is, a sequence when there is a request for activation from the in-home device side. The in-home device side sends the call signal a ₁₁ and the transmission signal R ₁₁ to the subscriber side device 30. 4 to the interface circuit 11-331, the interface circuit 11-331 and the transmission line terminating circuit 31, which have been stopped in the same manner as the call initiation sequence of the second embodiment of the present invention shown in FIG. 4B. Separation circuit 3
2 and the multiplexing circuit 34 are activated, and the transmission signal R ₁₁ passes through the multiplexing circuit 34 and the transmission line terminating circuit 31 to the subscriber transmission line 21.
Sent to. In the opposite station device 10, the transmission signal R ₁₁ received via the subscriber transmission line 21 is input to the transmission line termination circuit 12 and the signal detection circuit 14. When a signal is input to the signal detection circuit 14 in the subscriber side device 10, the detection signal S _det is output to the control circuit 15. At this time, since the logical condition L ₄ for activating the transmission line terminating circuit 12 by the control circuit 15 in the subscriber side device 10 shown in the equation (6) is satisfied, the transmission line terminating circuit 12 that has been stopped is activated, The transmission signal R ₁₁ is transmitted to the network side via the transmission line signal demultiplexing / logical conversion circuit 18 and the subscriber signal demultiplexing circuit 16. The subsequent sequence is the same as the call initiation sequence of the second embodiment of the present invention shown in FIG. 4 (b).

FIG. 6C shows the stop sequence. Similar to the call initiation sequence of the second embodiment of the present invention shown in FIG. 4C, the interface circuit 1 is connected from the network side.
When the stop control signal D ₁₁ for 1-331 is transmitted,
Since the two lines of the interface circuit 11-331 and the interface circuit 21-431 are in communication, the transmission path signal demultiplexing / logic conversion circuit 18 causes the stop request signal DEA.
Do not send CT. As a result, the stop control signal D ₁₁ is sent to the subscriber transmission line 21 via the subscriber signal demultiplexing circuit 16, the transmission line signal demultiplexing / logical conversion circuit 18, and the transmission line terminating circuit 12 to oppose the subscriber side device. 30 and the subscriber side device 40. In the subscriber side device 30, the interface circuit 11-331, the transmission line terminating circuit 31, the separation circuit 32, which have been activated in the same manner as the call initiation sequence of the second embodiment of the present invention shown in FIG. The multiplexing circuit 34 stops. On the other hand, although the subscriber unit stop control signal D ₁₁ to 40 is input, the separation circuit 42 which separates only the signal addressed to device, suspension control signal D ₁₁
Is not input to the interface circuit 21-431, and communication on the line 2 continues. After that, when the stop control signal D ₂₁ for the interface circuit 2-332 is transmitted from the network side, the interface circuit 11-331 has already stopped and only the interface circuit 21-431 is in communication, so the transmission is performed. The path multiplexing / demultiplexing / logical conversion circuit 18 sends a stop request signal DEACT to the control circuit 15. Upon receiving the stop request signal DEACT, the control circuit 15 stops the transmission line terminating circuit 12. The subsequent sequence is the same as the stop sequence of the second embodiment of the present invention shown in FIG.

In each of the above embodiments, the control method for activating / stopping each call of the line multiplex transmission device has been described, but a similar control method can be applied to a control method for various maintenance functions such as prayer test and transfer of error monitoring information. Is also applicable. Further, in the above description, the method of starting and stopping both the station side device and the subscriber side device for each call is described, but only one of the station side device and the subscriber side device is controlled for start and stop for each call. Obviously, the other device can be always activated regardless of communication and non-communication.

[0043]

As described above, according to the present invention, in the station side device, the signal detection circuit for detecting the transmission path signal from the opposite subscriber side device, the signal detection output of the signal detection circuit, and the plurality of lines. To the multiplex circuit, the demultiplexing circuit, and the transmission when the incoming call start control signal and the stop control signal are input and the signal detection output is received, or when the incoming call start control signal is received in at least one of a plurality of lines. Control to start the line terminating circuit and stop the multiplex circuit, the demultiplexing circuit and the transmission line terminating circuit when a stop control signal is received for only one of the plurality of lines during communication. It is equipped with a control circuit. Further, in the subscriber side device, a signal detection circuit for detecting a transmission path signal from the opposite station side device, the detection signal of the signal detection circuit and the call signal detection output from a plurality of interface circuits are input and the signal When the detection signal of the detection circuit is received or the call signal detection output is received for at least one of the plurality of interface circuits, the multiplex circuit, the separation circuit and the transmission line terminating circuit are activated, and one station side device is activated. And a control circuit for controlling so as to stop the multiplex circuit, the separation circuit, and the transmission line termination circuit when the signal of 1 is not detected by the signal detection circuit. As a result, a multiplexing circuit, a transmission line terminating circuit and a separating circuit in the station side device, a transmission line terminating circuit in the subscriber side device, only when there is an outgoing call or an incoming call in any one of the multiplexed multiple lines, When there is no call on all the lines when the separation circuit and the multiplexing circuit are activated, the multiplexing circuit, the transmission line termination circuit and the separation circuit in the station side device, the transmission line termination circuit, the separation circuit and the multiplexing circuit in the subscriber side device are used. By stopping, the call start / stop of the line multiplex transmission device is realized.

Further, a plurality of subscriber side devices having the same structure as the subscriber side device are connected to the station side device via a branch type transmission line, and in the station side device, the multiplex circuit is transmitted from the network side. Means for multiplexing the transmission signal, the incoming call activation control signal and the stop control signal for the plurality of subscriber side devices, and the demultiplexing circuit includes means for demultiplexing the multiplexed transmission signals from the plurality of subscriber side devices. In the subscriber side device, the demultiplexing circuit includes means for separating a transmission signal, an incoming call start control signal and a stop control signal from the station side device to the plurality of multiplexed subscriber side devices, and the signal detection circuit is By providing a means for outputting a signal detection output on condition that the received transmission path signal includes the transmission signal addressed to the own device, the incoming call start control signal and the stop control signal, a plurality of subscriber side devices can be provided. Connected Even if there is an outgoing or incoming call on any of the multiplex lines that are multiplexed, the multiplexing circuit in the station side device, the transmission line terminating circuit and separation circuit, the transmission line in the subscriber side device Termination circuit,
When there is no call on all the lines when the separation circuit and the multiplexing circuit are activated, the multiplexing circuit, the transmission line termination circuit and the separation circuit in the station side device, the transmission line termination circuit, the separation circuit and the multiplexing circuit in the subscriber side device are used. By stopping, the call start / stop of the line multiplex transmission device is realized. As a result, it is possible to significantly reduce the power consumption of the line multiplex transmission device and the battery capacity of the subscriber side device.

Further, the station side device is provided with a subscriber signal demultiplexing circuit corresponding to each subscriber side device and a transmission line signal demultiplexing / logical conversion circuit, so that each subscriber side device connected to the station side device When the number of subscribers is increased, it is possible to flexibly cope with the increase of subscribers by adding a subscriber signal demultiplexing circuit corresponding to each subscriber side device in the station side device.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment corresponding to the invention described in claims 1 and 2. FIG.

FIG. 2 is a block diagram showing a configuration of an embodiment corresponding to the invention described in claim 3.

FIG. 3 is a sequence diagram showing an example of start-up and stop operations in the configuration of an embodiment corresponding to the invention described in claims 1 and 2.

FIG. 4 is a sequence diagram showing an example of start and stop operations in the configuration of the embodiment corresponding to the invention described in claim 3.

FIG. 5 is a block diagram showing a configuration of an embodiment corresponding to the invention described in claim 4.

FIG. 6 is a sequence diagram showing an example of start and stop operations in the configuration of the embodiment corresponding to the invention described in claim 4;

FIG. 7 is a block diagram showing an example of a conventional circuit multiplex transmission device.

FIG. 8 is a sequence diagram showing an example of starting and stopping operations in a conventional line multiplexing transmission device.

[Explanation of symbols]

 10 Station Side Device 11 Multiplexing Circuit 12 Transmission Line Termination Circuit 13 Separation Circuit 14 Signal Detection Circuit 15 Control Circuit 16, 17 Subscriber Signal Demultiplexing Circuit 18 Transmission Line Signal Multiplexing / Logic Conversion Circuit 20 Subscriber Transmission Line 21 Branching Subscriber Transmission line 30 Subscriber side device 31 Transmission line termination circuit 32 Separation circuit 33i interface circuit 34 Multiplexing circuit 35 Signal detection circuit 36 Control circuit 40 Subscriber side device 41 Transmission line termination circuit 42 Separation circuit 43i Interface circuit 44 Multiplexing circuit 45 Signal detection Circuit 46 Control circuit

Claims (4)

[Claims] 1. A multiplexing circuit for multiplexing transmission signals of various lines and various control signals transmitted from the network side, and converting the multiplexed transmission signals and various control signals into transmission path signals for transmission. In addition, in the station side device provided with a transmission line terminating circuit for receiving a transmission line signal from the opposite subscriber side device, and a separation circuit for separating the multiplexed transmission line signal from the subscriber side device, A signal detecting circuit for detecting a transmission line signal from the subscriber side device, and a circuit in the station side device for activating the circuit when the signal detection output of the signal detecting circuit or the control signal from a plurality of lines is received. And a control circuit for controlling the circuit in the station side device to stop when a stop control signal is received for the line when only one of the lines is in communication. Each call is activated Multiplex transmission apparatus. 2. A plurality of interface circuits that start and stop by receiving a control signal transmitted from a network side or a home device to the station side device via a transmission path, and transmission signals from the plurality of interface circuits. From the station side device, and a transmission line terminating circuit that converts the multiplexed transmission signal into a transmission line signal and transmits the transmission line signal and receives the transmission line signal from the station side device. In a subscriber side device provided with a separation circuit for separating the multiplexed transmission signal and various control signals, a signal detection circuit for detecting the transmission path signal from the opposite station side device, and a signal detection circuit When a detection signal or a calling signal detection output for at least one of the plurality of interface circuits is received, the circuit in the subscriber side device is activated and the station side device is activated. Call each network channel multiplex transmission apparatus characterized by comprising a control circuit to which a signal is controlled so as to stop the circuit of the subscriber unit if not detected by the signal detection circuit. 3. The demultiplexing circuit includes means for branching a signal addressed to the own device from a multiplexed signal from the station side device, and the signal detection circuit includes a signal addressed to the own device in a received transmission path signal. 2. The call-initiated line multiplex transmission device according to claim 1, further comprising means for outputting a signal detection output on condition that the call detection signal is included. 4. A subscriber signal demultiplexing circuit for demultiplexing a transmission signal for the subscriber side device and various control signals, and a transmission signal for a plurality of subscriber side devices for demultiplexing in the station side device. When an incoming call activation control signal is received on one line, an activation request signal is sent to the control circuit, and when only one of all multiplexed lines is communicating, a stop control signal from that line Of the transmission line signal demultiplexing / logic conversion circuit, which sends a stop request signal to the control circuit when receiving the start request signal, the stop request signal, and the signal detection circuit from the transmission line signal demultiplexing / logic conversion circuit. 3. The call activation circuit multiplex transmission device according to claim 2, further comprising: a control circuit that controls to activate or deactivate the transmission line termination circuit when a detection signal is received.