JPH011394A - Subscriber line termination circuit control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a
The present invention relates to a control device for call processing and maintenance testing of subscriber line termination circuits, which is suitable for switchboards accommodating a large number of refit termination circuits that require relatively complex control in connection with leg equipment.

[Conventional technology]

Regarding the conventional subscriber circuit side [Yes], D70 type self-switching switch [1], Hardware (1) 1 Editor B Honno FG Telephone Corporation (January 15, 1985), pages 127-146, p. As described above, the processing device periodically reads the monitoring signal 9 of the subscriber circuit, and when it is necessary to control the subscriber circuit, edits a control point sequence corresponding to the control content and controls the subscriber circuit.

A conventional example will be explained with reference to FIGS. 2 and 3. FIG. 2 is a block diagram of a conventional example, where 1 is a processing unit (CC), 2 is a control bit string generator (α month), 3 is a status bit string receiver (m), and 4 is a line termination circuit (OCU). ), 10 is a highway that accommodates control bit strings (COD, COl, CO2), and 11 is a state bit string (STO, STj,
This is a highway that accommodates ST2). Also, 12
is the subscriber line.

FIG. 3 is a time chart in an example in which the control bit string and status bit string accommodated in the highway 10.11 of FIG. 2 have three pits.

The processing device 1 periodically reads the contents received by the status bit string receiving section 3, writes a control bit string (t o, o ) = 2 representing a subscriber line connection instruction to the control bit string generating section 2, and then receives the status bit string. It is determined at time 1. that the received content of unit 3 has changed from the subscriber line stop state (0, 0, 0).
, and the expected state bit string at time t, that is, the force Ω indicates the clothing activation state (1, i.

When it is confirmed that the control bit string (1, 1, 0) has changed to 0), the control bit string (1, 1, 0) is written to the control bit string generator 2 at time t. When this control bit string (1, 1, 0) is sent to the subscriber line terminating device 4, the subscriber line terminating device 4 detects that the subscriber line has become activated and informs the terminal. Notice.

After the call ends, the processing device 1 writes a control bit string (tO, 1) i representing an instruction to stop the state of the subscriber line to the control bit string generator 2 at time t4. As a result, the statuses STo and ST1 periodically read by the processing device 1 change at time j5+t6, and become (0, 0, 0) indicating the subscriber line stop state.

[Problem that the invention seeks to solve]

In the above-mentioned conventional technology, since the processing device 1 performs all the controls, there are five problems such as a heavy burden. For example, in FIG. 3, time 1. ．． 1. The change at time j is not valid, and the change at
It is not until a change at 2*j6 is detected that the status bit string has changed and the process proceeds to the next step. However, in the conventional case, time 1. , 1. When a change in is detected,
It is necessary to determine that the change is invalid. This judgment process is essentially a wasteful process, and it can be said that the load on the processing device is correspondingly large.

Also, in the exchange, call processing f! is performed using a call processing program. ;
In addition to performing IJTh, maintenance test control is performed using a maintenance test program, but the processing methods for signals sent and received between processing device #1 and subscriber line termination circuit 4 are different. Therefore,
Call processing control and maintenance test control must be completely separated. Conventionally, this separation has been performed by the processing device 1, but if the control and monitoring of subscriber circuits becomes complicated, there is a risk that the burden on the processing device that performs the separation will increase significantly.

An object of the present invention is to provide a control device for a subscriber line termination circuit that reduces the load on a processing device.

[Problem f! :Means to solve]

The above purpose is to obtain control points of reconnaissance and multiple state points I.
- A subscriber line termination circuit on the exchange side having i and a processing device are connected via a highway that accommodates a control bit string corresponding to a control point and a state bit string corresponding to a state point, and control based on the phalanx of the processing device is performed. In an apparatus for sending a bit string to the subscriber line terminating circuit, controlling the subscriber line terminating circuit, monitoring changes in the wide bit string output from the subscriber line terminating circuit, and notifying the processing device. , a first means for sending a control bit string necessary for controlling the subscriber line termination circuit to the subscriber line termination circuit (according to an instruction from the processing device), and a control bit string corresponding to the control bit string sent out by the first means. The expected pattern of the state bit string is
a second means for notifying the processing device and the first means when it is detected that the status bit string output from the subscriber line termination circuit has become the expected pattern; The first means autonomously sends the next control bit string to the subscriber line termination circuit in response to a notification from the second means, and furthermore, when the control bit string has a specific pattern, the first means This is achieved by instructing the two means to issue a notification to stop the notification to the processing device.

[Effect]

In the call processing, the first means autonomously sends out the second and fifth control bit strings in sequence, knowing that the control state on the subscriber line termination circuit side will become the expected control state based on the notification from the second means. . The second means sequentially changes the expected turn according to the notification from the first means and notifies the processing device and the first means every time the status bit string sent from the subscriber line termination circuit becomes the expected pattern. Therefore, the burden on the processing device is reduced.

When a maintenance test instruction is issued from the processing device to the first means,
The first means sends a control bit string of a specific turn corresponding to the maintenance test to the subscriber line termination circuit, causes the second means to set an expected pattern corresponding to the specified turn, and further sends a status bit string. When the expected pattern is reached, notification to the processing device is prohibited.Thereby, call processing and maintenance test processing are separated.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 and 3.

FIG. 1 is a block diagram of a subscriber line termination circuit control device according to an embodiment of the present invention. In FIG. 1, a processing device 1 instructs a control bit string generating section 5 to receive signals from a full sending status bit string receiving section 5 and a status bit string change detecting section'' (5TRC) 6. Control bit string generation The unit 5 receives the instruction from the processing device 1 and the control signal from the status bit string change detection unit 6, and then writes the control bit string t=collection to the control bit string generating unit 2 to be sent to the subscriber line termination circuit 4. The bit string change detecting section 6 receives the state bit string in the expected pattern of the state bit string corresponding to the control bit string (receiving the control bit string written by the control bit string generating section 5 to the control bit string generating section 2 from the notification from the control bit string generating section 5). The subscriber line termination circuit 4 periodically monitors the received contents of the control bit string generating section 6. When the subscriber line termination circuit 4 becomes in a state according to the control bit string sent from the control bit string generating section 2, it sends a status bit string indicating the state to the status bit string receiving section 3. Then, the state bit string change detection unit 6 detects the processing device 1 in call processing.
When detecting a change to the status bit string that should be notified to the processing unit It,1, the change is notified to the processing device It,1, and when detecting a change to the status bit string that should be written to the control bit string generating section 2, a control bit string is generated. A control signal is sent to section 5.

Next, the specific operation of the subscriber line termination circuit control device shown in FIG. 1 will be explained with reference to FIG. 3.

When a subscriber line connection command is issued from the processing device 1 to the control bit string generating section 5, the control bit string generating section 5 generates the signal at time t.

Control bit string (1, 0, 0) 'i is written to the control bit string generation section 2, and the expected state bit string pattern (1, 1, 0) corresponding to the control bit string (10, o) is written to the state bit string change detection section 6. iNotify. When the subscriber line termination circuit 4 receives this control bit string (1°0.0) and the subscriber line is activated, the status bit string (1, 1, 0) is sent from the subscriber line termination circuit 4 as a state 1 modulus bit string. The signal is sent to the receiving section 3.

The state bit string change detecting section 6, which periodically monitors the received contents of the standard bit string receiving section 3, is connected to the subscriber line termination circuit 4.
When it is detected that the state bit string sent from the terminal matches the expected state bit string (detected at time t2 in the example of the sixth cause), the processing device 1 is notified of the terminal call, and the control bit string generator 5 Sends all control signals to.

The control bit string generator 5 that received this control signal then generates a control bit string (tl,
0) is written into the control bit string generator 2, and the control bit string generator 2 sends this control bit string to the subscriber line termination circuit 4 at time t.

When a subscriber line stop command is issued from the processing device 1, the control bit string generator 5 edits the control bit string (1, 0, 1) representing the subscriber line stop instruction and writes it into the control bit string generator 2. The expected state bit string (o, o, o) corresponding to the control bit string is notified to the 1-state bit string change detection unit 6. Control bit string generator 2 sends this control bit string to subscriber line termination circuit 4 at time t4.

When the state bit string change detection unit 6 detects that the state bit string sent from the power line termination circuit 4 matches the expected state bit string (time ta), it informs the processing device 1 of the stop state. At the same time, a control signal is sent to the control bit string generation section 5.

The control bit string generator 5, which has received all of the control signals, generates the control bit string shown at time t...
Sends 10K.

The above is the operation procedure for call processing control. Next, the operating procedure for performing a maintenance test on the subscriber line termination circuit 4 will be explained. When performing a maintenance test, if the state bit string change detection unit 6 notifies the processing device 1 every time the state bit string becomes the expected state bit string, the processing device 1 will perform other processing based on the notification. Therefore, it is necessary to prevent such notifications from being output to the processing device 1 during maintenance tests. Therefore, the processing device 1 sends a specific control bit string (@ (0, 0, O) (t o) for a maintenance test.

0 ) (t 1. o ) (a pattern other than t o, 1)), the control bit string generator 5 transfers this control bit string to the control bit string generator 2.
At the same time, it sends an instruction to the random bit string change detection unit 6 to prohibit notification to the processing device 1. As a result, for example, the above command is issued at time t! between time t and tl. When the status bit string shown in is generated, reporting to the processing device 1 by autonomous operation and transmission of the status bit string shown at time t3 are prohibited.

According to this embodiment, time 1. , 1. There is no need to invalidate the processing device 1 due to a transient change in the status bit string at time 13.1. Processing device 1 does not have to perform the process of inputting the control bit string shown in FIG.

〔Effect of the invention〕

According to the present invention, the load on the processing device is reduced, and the effects of maintenance test control on call processing control can be completely avoided.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a subscriber line termination circuit control device according to an embodiment of the present invention, FIG. 2 is a block diagram of a conventional subscriber line termination circuit control device, and FIG. 3 is a block diagram of a control bit string and status bit string. This is a timing chart. 1... Processing device, 2.5... Control bit string generation unit,
3... Status bit string receiving section, 4... Subscriber line termination circuit, 6... Status bit string change detection section. 4. − Representative Patent Attorney Masao Ogawa □: 1. ', , J+, th l concave 1, ,

Claims (1)

[Claims] 1. Connecting an exchange-side subscriber line termination circuit having multiple control points and multiple status points to a processing device via a highway that accommodates control bit strings corresponding to the control points and status bit strings corresponding to the status points. and transmitting a control bit string based on a command from the processing device to the subscriber line terminating circuit to control the subscriber line terminating circuit, and monitoring changes in a status bit string output from the subscriber line terminating circuit. In the device for notifying the processing device, a first means for sending a control bit string necessary for controlling the subscriber line termination circuit to the subscriber line termination circuit according to an instruction from the processing device; setting an expected pattern of a status bit string corresponding to the control bit string that has been received by the first means, and upon detecting that the status bit string output from the subscriber line termination circuit has become the expected pattern; and a second means for notifying the first means, wherein the first means autonomously sends the next control bit string to the subscriber line termination circuit in response to the notification from the second means; A control device for a subscriber line termination circuit, wherein the first means notifies the second means to stop notification to the processing device when the control bit string is a specific pattern.