JPS59133764A - Circuit control system - Google Patents

Abstract

PURPOSE:To transfer the fault information by means of an ordinary public circuit by providing a means which inserts and extracts the fault information into and out of a specific channel and a setting microprocessor for transfer circuit of fault information for each type of information transfer circuit. CONSTITUTION:A microprocessor MP12 connected to a circuit DTI2 is actuated with application of a power supply of a station, and a start signal is transmitted from the processor MP12 via an ordinary public circuit as well as a specific channel of the DTI2. Then the circuit is connected between a local office and a remove maintenance operating station RMC. If a fault is detected at a local office, a control circuit 8 actuates a transmitting circuit 9. This start signal is put into the specific channel by a selector 4 via a CODEC10 and distributed to the specific channel of the circuit DTI2 through a multiplexed separating circuit 6 to be transfered to the RMC.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a line control system, and particularly to a line control system for transferring fault information of a telephone exchange.

Traditionally, this type of line control system has been divided into two types: one that uses a dedicated line and one that uses a general public line. The drawback was that the cost was high and it was not economical. Since the latter uses general public lines, it has the disadvantage that if the station transmitting the fault information goes down and call processing stops, the fault information cannot be transferred.

The present invention eliminates the above drawbacks and provides a line control system that uses general public lines and allows even small stations to economically transfer failure information.

According to the present invention, in a line control method for transferring fault information to a remote maintenance operation station using a general public line, inserting fault information into a specific channel among multiplexed channels;
A line control system is obtained which is characterized in that each trunk type includes an extracting means and a line control microprocessor for transferring failure information.

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, a first embodiment of the present invention includes an analog trunk line (TRK) 1, a digital trunk line (D
TI) 2, multiplexer (MUX) 3, multiplexed 9 PCs
Selector (S) that sends a signal to a specific channel of the M signal
EL) 4, time division switch (TDSW) 5, multiplexing/demultiplexing device (DMUX) 6, failure information control device (ALMCM)
7. A failure information control circuit (ALMC) 8 that controls failure information within the ALMCM 7, a failure information transmission circuit (ALSND) 9 that sends out failure information, a circuit (CODEC) 10 that encodes and decodes failure information, and an analog trunk line. A microprocessor (MP) 11 that controls the control, a microprocessor (M
P) 12.

This embodiment is a block diagram showing a relay method of a local telephone exchange.
For this purpose, a general public line is used, and TR, Kl, and DTI2 are used as connection lines with RMC.The former and latter are used for line control to send fault information without call processing or program intervention. I have MPtl, 12.

Now, the case where DTI2=z is used as a connection line with RMC will be explained. When the power of the station is turned on, the MP12 connected to DTI2 is activated, and an activation signal is sent to the MP12 using the general public line through a specific channel of DTI2, and the local station connects to the local station according to the connection signal sequence between the stations. Connect the line between RMC and RMC. No call processing program is involved in connection of this line, and everything including signal transmission and reception is executed by the MP 12.

A general call processing program cannot access a specific channel set for fault information transfer. Once the line is set up, a particular channel is always set up as a dedicated line for the transfer of fault information.

When a fault is discovered at the local telephone office, ALMC8 activates ALSND9 to transfer the fault information to RMC. A
The activation signal from LSND9 is coDEcl.

is converted into a PCM signal, inserted into a specific channel by 5EL4, distributed to a specific channel of 9DTI2 by DMUX6, and sent to the RMC signal through the specific channel of DTI2.
will be forwarded to. The RMC maintainer who receives the activation signal sends an instruction to send detailed information to the station that sent the activation signal. This instruction is passed through the connected line to the MU
Only the signal of a specific channel of the channels multiplexed by X3 is separated from the output of MUX3 and C0DEC10,ALS
The detailed information transmission instruction is received by the ALMC 8 in the form of a push button signal through the ND 9, and the detailed information is transmitted to the RMC in the same manner as described above.

In this way, in this embodiment, the fault information is transferred without passing TD8W5=2, so even when the system is down, the fault information can be transferred at the same level as a dedicated line.

Also, TRKI the output of ALMC8.

Since it is not inserted directly into DTI2, but is performed in the common part after it is converted into a PCM signal, the ALMCM7 control part can be integrated together, and the special TRK1. Does not require DTI2.

As explained above, the present invention has a configuration in which means for inserting and extracting fault information into a specific channel among multiplexed channels and a microprocessor for setting a line for transferring fault information are provided for each line type. By doing so, it is possible to use a general public line to transfer failure information economically at the same level as a dedicated line.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Analog trunk line, 2...
Digital trunk line, 3...Multiplex circuit,
4... Selector f, 5... Time division switch, 6... Multiplexing/separating circuit, 7...
Fault information control device, 8...fault information control circuit,
9...Fault information control circuit, 1o...Coder/decoder p, 11.12...Microprocessor, RMC...Remote maintenance operation station, T O
N E... Sound source. \-/

Claims (1)

[Claims] In a line control method that uses a general public line to transfer fault information to a remote maintenance operation station, means for inserting and extracting fault information into a specific channel within multiplexed channels, and line control for transferring fault information. A line control system characterized by including a microprocessor for each type of trunk line.