JPS6290096A - Circuit monitor system - Google Patents

Abstract

PURPOSE:To improve the using efficiency of an input port and to make a sub CPU unnecessary as a circuit monitor means by sharing a CPU's circuit state monitor input port with plural circuits. CONSTITUTION:The CPU 3 cyclically reads plural input ports without fail. When an read action comes to the input port P, the CPU 3 reads the logical states of terminals p0-p7 at that time, processes each monitor information and executes a necessary control. Accordingly reading of one input port P enables to read monitor information on two trunk lines 11 and 12. When the input port P is read, the terminals p2 and p3, for instance, stand at logic '01', which means they keeps a value at the time of reading previous time, and terminals p6 and p7 change to '10' from the logic '01' appearing at the time of reading previous time. Then the trunk line 12 is used for outgoing a trunk line, and simultaneously this change means that a response at an opposite part is present between reading this time and previous time. The CPU 3 controls a charging device to activate, for instance. Thus the CPU 3 simultaneously controls two trunk line circuits by reading one input port P.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system for monitoring the state of lines in telephone exchange equipment such as a private branch exchange or a button smack device 11, and particularly relates to a system for monitoring the line status in a telephone exchange device such as a private branch exchange or a button exchange device 11. This relates to a line monitoring system for telephone exchange equipment that is collectively controlled by a CPU (CPU).

[Technical background of the invention]

In telephone exchange equipment K that is collectively controlled by a central processing unit (hereinafter referred to as CPU), the status of lines (dedicated lines, central office lines, etc.) is generally monitored by setting the status monitoring signal input to the input port of the CPU. This is done by scanning cyclically with K and reading the state at that time with the CPU.

Monitoring items include, for example, monitoring incoming calls to the central office line, monitoring polarity to detect a called party's response, and monitoring the central office line as a direct line (not accommodated in a single-talk exchange). (Connected to the terminal.), etc., and these are generally monitored by signals from the call trunk (office line trunk).

By the way, since the number of input ports of the CPU is limited,
When there are a large number of lines to be monitored, it is common practice to provide a sub-CPU for each line, process the monitoring information to a certain extent by the sub-CPU, and then input the monitoring information to the main CPU for processing. However, providing a CPU for each line not only increases the cost but also complicates the processing program.

On the other hand, the number of monitoring items is the number of input port terminals (i.e., C
When the number of bits that can be processed by the PU (the number of processing bits of the PU) is reduced, some terminals are left unused, resulting in lower port usage efficiency.

[Purpose of the invention]

In view of the above, an object of the present invention is to obtain a line monitoring method that does not require a sub-CPU for each line to monitor the line and has high utilization efficiency of the input port for line status monitoring of the CPU. be.

[Means to achieve the purpose]

For the above purpose, the present invention divides the terminal group of one line status monitoring input port of the CPU into a plurality of groups, and assigns the terminal group of each group to each of the plurality of lines. The number of lines is multiple.

[Configuration of Example]

The drawing is a block diagram of an embodiment of the invention.

This embodiment is an example in which the line to be monitored is a central office line, and the monitoring items are three items: incoming call monitoring to the central office line, polarity monitoring of the central office line, and direct/non-direct monitoring. The port is assumed to monitor two station lines, and two lines of the station line are illustrated.

The status of the office lines 11 and 12 is monitored using the office line trunks 21 and 22.
Each monitoring circuit (switching circuit 211, 221 incoming call monitoring circuit 2
This is done by inputting the monitoring information from the line monitoring circuits 213, 223) to the input port P of the CPU 3.

That is, the monitoring information output terminals of the switching circuit 211, the incoming call monitoring circuit 212, and the line monitoring circuit 213 of the office line trunk 21 are connected to the terminals po, p+, and pgrps of the first four bits of the input port P of the CPU, respectively. Each monitoring information output terminal of the switching circuit 221, incoming call monitoring circuit 222, and line monitoring circuit 223 of the office line trunk 22 is connected to the C
Terminal 2 of the last 4 bits of input port P of PU ps
and connected to pg and py. In addition, in the example, C
An 8-bit microcomputer is used for PU3.

In addition, the communication path 214°224 of the office line trunk 21.22
is housed in a switch network 4 whose opening/closing is controlled by the CPU 3, and whose connection to telephones 51 and 52 is controlled by the CPU 3.

In addition to the input port P, the CPU 3 has an output port Q that processes monitoring information and outputs control information. Many controlled units are connected to this output port Q, and the figure shows a switch network 4 and a sound source 6 controlled by incoming call monitoring information as examples of the controlled units.

The switching circuits 211, 221 are circuits that switch the central office lines 11, 12 between the direct terminals 71, 72 and the spiral telephones 51, 52. Switching information is composed of 1 bit, and for example, when switching to the direct terminals 71, 72, 111. Logic ``1#'' is output when the

The incoming call monitoring circuits 212 and 222 are switching circuits 211°221
When a calling signal (usually an AC signal of 16) IZ or 20 H2 that lasts for 1 second after 2 seconds) arrives on the central office lines 11 and 12 while the telephone is switched to the extension machine 51, 521M11, this This is a circuit that detects the incoming call, and the incoming call monitoring information is 1
For example, when there is an incoming call, the logic is “1”.
is output.

The line monitoring circuits 213 and 223 are circuits that monitor the polarity of both lines of the central office line and detect a response from the other party when a call is made by reversing the polarity.In order to monitor both lines, the line monitoring information is It is composed of 2 bits, and the logic is inverted from, for example, #01 to "10" before and after the polarity is inverted.

[Effect of the embodiment]

The CPU 3 always cyclically reads data from a plurality of input ports. When the reading operation reaches the input port P shown in the drawing, the logic state of each terminal p0 to p, r at that time is read, and the respective monitoring information is processed to perform necessary control. Therefore, reading from one input port P results in 2
Each monitoring information is included for both of the two central office lines 11 and 12.

When input port P is read, for example, assume that terminal p0 is logic #1'' and terminal p is logic #0''.
At this time, the switching circuit 211 means that the central office line 11 is switched to the direct terminal 71 side, and the central office line 12 is switched to the telephone 51, 52 side, and the CPU 3 is switched to the central office line trunk 21.
(communication path 214) is blocked. As a result, station N511 cannot be acquired from telephones 51 and 52. In addition, if the central office line 11 is blocked, the central office line display means (
(compatible with the local office line 11), for example, in a busy display format.

When input port Pfc is read, for example, assume that terminal p is logic "0" and terminal pH is logic "1#". At this time, there is an incoming call on central office line 12 and a calling signal has arrived. This means that the CPU 3 is connected to the telephone 51.
Incoming call display processing is performed for 52. That is, the activation signal of the sound source 6 and the control signal of the switch network 4 are output to the output port Q, the cross point between the telephone 51, which displays an incoming call to the central office line 12, and the sound source 6 is closed, and the cross point between the telephone 51 and the sound source 6 is closed. For example, when reading the 0-input capo P that displays an incoming call on the office line display means (compatible with office line 12), the terminals pt and pm are set to the logic #01# at the time of the previous reading.
remains, and terminal p6. Assuming that pq has changed from the logic "01#" at the time of the previous reading to '°10', the station line 12 will be used for station line transmission, and the response from the other party will not be received between the previous reading and the current reading. The CPU 3 controls, for example, to start up a billing device (not shown).

As explained above, the CPU 3 simultaneously controls two central office lines by reading one input port P.

In the above embodiment, an 8-bit microcomputer is used as the CPU, and the status is monitored using 4 bits per line, so that two lines are monitored per input port. If a 16-bit microcomputer is used to monitor the same items as in the embodiment, four lines can be monitored per input port. In this way, the number of monitoring lines for one input port is determined by the monitoring items and the bit configuration of the CPU.

〔Effect of the invention〕

As explained above, the present invention allows the CPU 0 line/line status monitoring input port to be used by multiple lines, thereby increasing the usage efficiency of the input port and, for example, using a sub-CPU etc. for line monitoring. The present invention has many advantages, such as not requiring it as a means and therefore simplifying the control method (processing program), and its effects are extremely large.

[Brief explanation of drawings]

The drawing is a block diagram of an embodiment of the invention. (Main symbols) 11.12... Office line 21.22... Office line trunk 3... Central processing bag +t (CPU) 211.221... Switching circuit 212.222... Incoming call monitoring circuit 213.223... Line monitoring circuit P... Input port. Procedural Amendment 27/1950 11, ' Commissioner of the Patent Office Black rIl (IrJ, 9
-1. Indication of the case Relationship with the Showa Otsu Q year patent application No. 22544-'2 case
Applicant 4, Agent Address: 330 Marunouchi Shigesu Building, 2-6-2 Marunouchi, Chiyoda-ku, Tokyo Name (3667) Teruo Taniyama", :1"2. '・ 8. Details of the amendments are in the attached sheet. Amendments The drawings in question will be amended as follows. Note 1. Correct the drawing as shown in the attached sheet.

Claims (1)

[Claims] In a telephone switching device in which the state of multiple lines is monitored by a central processing unit, the terminal group of the line state monitoring input port of the central processing unit is divided into multiple groups, and each group of terminals is connected to the line state monitoring input port of the central processing unit. A line monitoring method that monitors the status of multiple lines per port by assigning them to each port.