JPH01264493A - Speaking level compensating system - Google Patents

Abstract

PURPOSE:To prevent the unnecessary raising of a speech level and to decrease the number of amplifier trunks by controlling whether incoming and outgoing trunks are to be connected to the amplifier trunks or not based on stored contents set by a maintenance console in a four-wire exchange. CONSTITUTION:A CPU7 reads the service condition of the amplifier trunks, which is the corresponding relation between the incoming side directional path number and the outgoing side directional path number of a memory 5 set and stored by a maintenance console 6, and controls whether incoming and outgoing trunks 1 and 2 through a channel 4 are to be connected to an amplifier trunk 3 or not according to the instruction. The speech level can be properly corrected, the unnecessary raising of the speech level can be prevented, and the number of the amplifier trunks can be decreased by this system.

Description

[Detailed Description of the Invention] Industrial Field of Use] The present invention relates to a call level compensation system, and particularly to a call level compensation system in which the content of call level compensation is set for each correspondence relationship between an incoming route number and an outgoing route number. Level Compensation Method [Prior Art] Conventionally, the speech level compensation method in a four-wire trunk exchange has been a method in which an amplifier circuit is prepared for each line and unconditionally inserted into the communication path.

(Problems to be Solved by the Invention) The conventional speech level compensation method described above unconditionally inserts an amplifier circuit for each line, so it is necessary to prepare the same number of expensive amplifier circuits as the number of lines, and the speech level Even when the communication level is sufficient, there are disadvantages in that raising the speech level more than necessary may make listening difficult or increase distortion, which may even worsen the S/N ratio.

An object of the present invention is to know the usage conditions of an amplifier trunk from the correspondence between the incoming route number and the outgoing route number when connecting a relay call in a 4-wire trunk exchange, and to connect the amplifier trunk to the call path according to the instructions. By using the insertion method and performing speech level compensation that is suitable for the speech line, it is possible to prevent unnecessary speech levels from increasing too much and achieve an economical speech level that reduces the number of required amplifier trunks. Supplementary f
d method.

[Means to solve the problem]

The call level compensation system of the present invention is an amplifier trunk used in a headband connection that houses amplifier circuits that amplify the call voice of each of the incoming trunk, outgoing rank 1 to rank, and up and down communication lines of a 4-wire relay exchange. and the amplifier trunk for each communication path that interconnects the outgoing trunk, the incoming trunk, and the amplifier trunk, and the correspondence relationship between the incoming route number of the incoming trunk and the outgoing route number of the outgoing trunk. A storage device that stores whether or not a trunk is to be used; and a storage device that stores in advance whether or not the amplifier trunk is to be used for each correspondence relationship between the incoming side route number and the outgoing side route number. This is a configuration that includes a maintenance console and a maintenance console.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention.

The amplifier trunk 3 used in the headband connection, which includes an amplification circuit that amplifies the voice of each communication line for input 1 and rank 1, output 1 and rank 2, is connected to communication path 4 and is used for input and output. A storage device that stores whether or not the amplifier trunk 3 is used for each correspondence relationship between the incoming (Lily route number R'T'i) of trunk 1 and the outgoing route number RTO of outgoing 1-rank 2. 5 and a maintenance console 6 for setting whether or not to use the amplifier trunk 3 for each correspondence relationship between the input side route and the output side route of the storage device 5, and a central processing unit that controls the entire interchange machine. Connected to device 7. Amplifier I, rank 3
has four terminals as terminals for connection to the communication line 4: an input terminal Ti and an output terminal To of two communication lines, and an input terminal Ri and an output terminal RO of a downstream communication line.

Next, the operation will be explained.

When there is an incoming call at rank 1, and enough dialed number information is received to determine the outgoing route, the central processing unit 7
starts the storage device 5 and obtains information about the usage conditions of the amplifier trunk 3 from the input route number RTi and the output route number RTo. The central processing unit 7 selects the amplifier trunk 3 based on the information obtained from the storage device 5, and connects the incoming trunk 1 to the incoming terminal Ti of the uplink speech line of the amplifier trunk 3.
and the output terminal RO of the downstream communication line, and is connected to the output terminal T of the upward communication line of the amplifier trunk 3.

And the incoming terminal Ri of the downlink communication line is connected to the outgoing trunk 2. The housing position of the amplifier trunk 3 in the communication path 4 is determined in advance between the housing position of the terminal on the side connecting rank 1 to the input 1 and the housing position of the terminal on the side connecting to the output trunk 2. This relationship is established so that once the amplifier trunk 3 is determined, the housing positions of all the terminals to be connected can be determined.

Next, the ingress route number RTi and the egress route number RT o
A method of using the memory of the storage device 5 to obtain information about the conditions of use of the amplifier trunk 3 will be described.

FIG. 2 is a memory configuration diagram of the storage device 5. As shown in FIG.

First, the ingress route number RTi and the egress route number RT.

Once determined, the primary table is searched using the ingress route number RTi, the start address of the secondary table is read, and the contents of the corresponding address in the secondary table are then searched using the ingress route number RTi.
Search by. The output route number RT o is composed of 8 bits, the lower 3 bits indicate the bit direction (X direction in the figure), and the upper 5 bits 1- indicate the byte direction (Y direction in the figure).
is decided.

This search ultimately yields the code "0" or "1". If the sign r1. If this is obtained, connection is made by inserting the amplifier trunk 3 into the ml between the incoming trunk 1 and the outgoing trunk 2. If the code r□ is obtained, the incoming rank 1 and the outgoing trunk 2 are directly connected.

The codes 'OJ' and 'IJ' in this secondary table are set in advance by a maintenance person of the exchange via the maintenance console or the central control unit. This setting is possible even when the exchange is in operation, and if an unsatisfactory relay connection of 1 call occurs during operation, the incoming route number RTi and outgoing route number RT o are determined. Immediately reset the code in the secondary table to its proper state.

In this embodiment, we have explained the case where there are only two types of codes, "O" and "1", but if we read out 2 pins I as a - set, four types of states can be obtained. It becomes possible to use three types of amplifier trunks (for example, those with different output levels).

Next, among the above-mentioned operations, particularly the operation of the central processing unit 7 will be explained.

FIG. 3 is a flow chart of the operation of the central processing unit 7.

When a relay call connection occurs and the ingress route number RTi and the egress route number RTo are known, the usage conditions of the amplifier trunk are learned in step 1. If speech level compensation is not performed, normal relay call connection processing is performed.

If speech level compensation is to be implemented, then step 2 is performed to determine whether or not there is space in the amplifier trunk. amplifier l
- If there is no vacant rank, perform connection restriction processing and send a busy tone to the caller. If there is space in the amplifier trunk, use step 3 to find out the terminal housing position of that amplifier trunk on the communication path, and then insert the amplifier trunk between the incoming trunk and outgoing trunk using a headband connection in step 4. , l compensates for the speech level in both the down and down directions.

〔Effect of the invention〕

As explained above, the present invention learns the usage conditions of the amplifier trunk from the correspondence between the incoming route number and the outgoing route number when connecting a relay call in a 4-wire trunk exchange, and operates the amplifier trunk according to the instructions. By inserting the system into the communication path and implementing speech level compensation suitable for the communication line, it is possible to prevent unnecessary speech levels from being raised excessively and to reduce the number of necessary amplifier trunk facilities. This has the effect that a speech level compensation system can be obtained.

In addition, when looking at relay connections that mix public networks and leased lines, which have been permitted and implemented in recent years, two
Problems with the speech level -L due to wire-to-four-wire conversion loss frequently occur, but the present invention has the advantage that most of these problems can be easily solved by applying the present invention.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a memory configuration diagram of the storage device 5, and FIG. 3 is a flowchart of the operation of the central processing unit 7. 1... Incoming trunk, 2... Outgoing trunk, 3... Amplifier l-rank, 4... Call path, 5... Memory Device, 6...Maintenance console, 7...Central control unit, RTi...
... Entrance route number, RTo... Exit route number -
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Ngu-1 or wheel\-1/

Claims (1)

[Claims] A 4-wire relay exchange has an incoming trunk, an outgoing trunk, an amplifier trunk used in a headband connection that includes an amplifier circuit for amplifying the voice of each upstream and downgoing call line, the outgoing trunk, the incoming trunk, and the amplifier. Whether or not the amplifier trunk is used is stored for each communication path interconnecting the trunks and the correspondence relationship between the ingress route number of the ingress trunk and the egress route number of the egress trunk. It is characterized by including a storage device, and a maintenance console that sets in the storage device in advance whether or not to use the amplifier trunk for each correspondence relationship between the input side route number and the output side route number. Call level compensation method.