JPS5880956A - Variable sound volume trunk depending upon subscriber's operation - Google Patents

Abstract

PURPOSE:To easily adjust a speech voice through subscriber's operation, by providing a voice level converting circuit and sound volume selection control circuit in the trunk circuit of an automatic telephone switchboard. CONSTITUTION:To the trunk circuit of an automatic switchboard which has monitoring circuit 14 and 15 for monitoring a switchboard-side station and an opposite station and a sequence control circuit 16 for controlling the monitoring circuits 14 and 15, voice level converting circuits 12 and 13 for converting voice levels of a transmission side and reception side and a sound volume selection control circuit 11 which controls said circuits 12 and 13 on the basis of a number dialed by a subscriber are added. Therefore, a speech voice is adjusted easily through the dialing of the subscriber.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be explained in detail regarding the trunk circuit of an automatic telephone exchange, but in order to adjust the sound of one call, a special telephone with a volume control function is used or an amplifier is inserted between each line. I was doing it. For this reason, people who do not own a special telephone set or on a line without an interline amplifier have the disadvantage that only a low voice level can be received, making it difficult to make a single call. However, even if the subscriber is equipped with an amplification amplifier, it is not possible for the subscriber to easily adjust the degree of amplification.

Therefore, an object of the present invention is to provide a means for easily adjusting the volume of the voice of a single call so that it can be easily heard by the subscriber's operation on an ordinary telephone, and in particular, on a general line without an amplifier installed. It is something. More specifically, the purpose is to provide a trunk that has the ability to adjust call audio by dialing the subscriber.

According to the present invention, in the trunk circuit of an automatic telephone exchange that has a monitoring circuit that monitors the own station and the opposing station on the local exchange side and a sequence control circuit that controls this monitoring circuit, the audio levels on the transmitting side and the receiving side are changed. Audio level conversion circuit.

A volume variable trunk operated by a subscriber is obtained, which is characterized in that a volume selection control circuit for controlling this audio level conversion circuit based on a subscriber's dial is attached.

If the subscriber is only able to send and receive calls with a low audio level, the volume cannot be adjusted by the subscriber's operation, even if the phone is a regular phone without a volume adjuster or a line without an amplifier installed. This allows one call to be carried out smoothly. Moreover, since it is possible to convert the level of only one of the sending and receiving calls, it is possible to make a preferable conversation between sending and receiving calls.

Next, a detailed explanation will be given with reference to the drawings.

FIG. 1 shows a diagram of a conventional relay system. Conventional subscriber EXT
@A and EXT EX in a call with @B or m-c
As I briefly explained earlier, when the received audio level at T-A was low, the volume was adjusted by using the EXT-A telephone as a special telephone with a volume control function. Also, if it is known from the beginning that the line audio level is low.

Amplifier AM between the line with EXT-B or EXT・C
P was in the closet. Therefore, subscribers who do not own special telephones, or who do not have several amplifiers inserted between the lines, have the disadvantage that only low voice levels can be received, making it difficult to make calls. Furthermore, even if an amplifier was inserted between the lines, the volume could not be easily adjusted because the adjustment had to be done manually. Next, the present invention will be explained.

FIG. 2 is a diagram illustrating a relay system using subscriber-operated volume variable trunks according to the present invention.

FIG. 3 is a diagram illustrating the structure of a subscriber-operated variable volume trunk according to the present invention. Referring now to FIGS. 2 and 3, a calling subscriber EXT-A dials the number of the called subscriber after hearing the message ``Next Dial To'' in a known manner.

EXT-A- by central controller CC-A, CC@B
LC-A-5WA-VVT@A-TRK-C-8WB-
A LC-B-EXT-B connection is formed.

If the called subscriber EXT-B responds and the voice level from this called subscriber EXT-B is so low that it is difficult for the calling subscriber EXT-A to hear it, then the calling subscriber EXT-B
-A dials a special number for volume amplification, the central control unit CC-A senses this, converts it into volume variable information, and sends this information to the volume selection control circuit 11 of one trunk.

The volume selection control circuit 11 of this trunk translates the above information and controls the transmitting side audio level converting circuit 12 and the receiving side audio level converting circuit 13. Through this control, the audio level conversion circuit 11 can set a volume that meets the wishes of the calling subscriber EXT-A and can listen to the call.

Contrary to the above, if the volume of the called subscriber EXT-B is high and feels harsh to the calling subscriber EXT @A, the calling subscriber EXT-A dials a special number to attenuate the receiving side's audio level. Then, only the receiving side audio level conversion circuit 13 of the 9 trunks is operated, and the called subscriber EXT-
By attenuating the voice level of B, a volume that is easy to hear can be transmitted to the second calling subscriber EXT-A.

In addition, if the calling subscriber EXT-A wants to listen to the call of the called subscriber EXT @B while doing other operations with the transmitter/receiver in place, the calling subscriber EXT-A can use the This can be accomplished by dialing a special number for increased level amplification.

For calls between extensions, use the same circuit as EXT -A-
LC-A-8W-A-VVT-B-8WA-LC-C-
The EXT-C (7) connection path enables service functions equivalent to those described above to be performed.

In addition, in the variable capacity trunk VVT, the local station monitoring circuit 1
4. Other station monitoring circuit 15. and sequence control circuit 16
is used for ordinary trunks.

As explained above, the present invention provides an audio level conversion circuit and a volume selection control circuit in the trunk, so that the audio level for transmission and reception can be varied according to the will of the subscriber who owns the general telephone set. Therefore, attenuation or amplification of only one side can be performed, and listening can be done without holding the handset in hand. In addition, since no amplifier is used between the lines as a special telephone with volume control and a separate device, there is the effect that level conversion can be performed at low cost.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a conventional relay system, FIG. 2 is a diagram of a relay system according to the present invention, and FIG. 3 is a block diagram of a circuit according to the present invention. Explanation of symbols 2 11 is a volume selection control circuit, 12 is a transmitting side audio level conversion circuit, 13 is a receiving side audio and pel conversion circuit,
14 is the local station monitoring circuit, 15 is the other station monitoring circuit, 16 is the "sequence control circuit, AMP-A and AMP-B are amplifiers, CC・A and CC-B are the central control units. EXT-A is the call joining EXT-B and EXT-C
is the called subscriber; hereafter, A is omitted, LC is the line circuit, SW is the link switch, TRK is the trunk,
VVT has variable volume trunks that are operated by subscribers.

Claims (1)

[Scope of Claims] 1. In a trunk circuit of an automatic telephone exchange having a monitoring circuit for monitoring the own station and the opposing station, and a sequence control circuit for controlling the monitoring circuit. A subscriber operation characterized in that it is equipped with an audio level conversion circuit that changes the audio level on the transmitting side and the receiving side, and a volume selection control circuit that controls this audio level conversion circuit based on the subscriber's dial. Volume variable trunk.