JPS62142443A - Telephone set with call tone automatic amplification circuit - Google Patents

Abstract

PURPOSE:To improve a callback function by providing a timer section and an amplifier section so as to increase the tone volume of a call tone from the amplifier section as time elapses. CONSTITUTION:In depressing a holding button SW, a relay HD starts operating, contacts hd0, hd1 are operated and a timer section TIM starts operation by the closing of the contact hd1. When a prescibed time elapses while the holding state is kept,a call signal for callback is sent from an exchange side. The call tone is sent from a speaker SP through the contact hd0 and the amplifier section AMP, and when the tone is not kept unreplied, the timer section TIM gives control to increase the amplification factor of the amplifier section AMP. As the time elapses while keeping holding, the call tone from the speaker is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone with an automatic ring tone amplification circuit.

[Conventional technology]

Conventionally, this type of telephone transmits a call signal from the exchange to the speaker S via the volume VR, as shown in Figure 2.
P was sent out, and the ringing tone was ringing.

[Problems to be solved]

In the conventional telephone described above, the volume of the ringtone is determined only by adjusting the volume VR, so if the user adjusts the volume VR to lower the volume in advance,
When a call-back service is provided, the volume of the ring tone for the call-back also becomes low, which causes the problem that the call-back becomes meaningless.

[Means for solving problems]

The present invention solves the above problems, and includes a timer section that is activated by pressing a hold button, and an amplifier section whose amplification factor is controlled by the timer section, and which controls the volume of the ringing tone. It is characterized in that the power of the amplifier section increases with the passage of time.

〔Example〕

Next, an example thereof will be explained with reference to FIG.

FIG. 1 is a block diagram of a circuit of an embodiment of a telephone with an automatic ring tone amplification circuit according to the present invention.
The same parts as those in the figure are given the same reference numerals.

In FIG. 1, SW is a hold button and HD is a relay.
hdo and hdl are the contacts of relay HD, respectively.

TIM is a timer part, AMP is an amplifier part, the timer part TIM can control the amplifier part AMP, and the amplifier part AMP is connected in parallel to the volume VR.

Next, the operation will be explained. tzu, hold button SW
When you press , relay HD is activated and contact hdo is activated.

hctl is activated. The timer section TIM starts operating due to the operation of the contact hdl. If the call remains on hold for a certain period of time, the exchange will send a call signal to call back. This ringing sound is from contact hdo, amplifier part A
MP is transmitted from the system speaker SP. However, if there is no response for a certain period of time, the timer section TIM controls the amplification factor of the amplifier section AMP to be increased. In this way, as time elapses while the call is on hold, the ringing sound of the speaker SP becomes louder.

〔Effect of the invention〕

As explained above, the present invention includes a timer section that is activated by pressing the hold button and an amplifier section whose amplification factor is controlled by the timer section. Regardless of the volume adjustment, the volume of the call signal when calling back can be determined, and the effect is that the call back function can be satisfied.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a circuit of an embodiment of a telephone with an automatic ring tone amplification circuit according to the present invention, and FIG. 2 is a block diagram of a circuit of a conventional telephone. TIM...Timer section AMP...Amplifier section V
R...Volume SP...Speaker HD
...Relay hdo, hdl...Relay H
Contact point SW of D...Hold button Agent Patent attorney Mura 1) Yukuni Miki

Claims (1)

[Claims] A call characterized in that it has a timer section that is activated by pressing a hold button, and an amplifier section whose amplification factor is controlled by the timer section, and the volume of the ring tone is increased by the amplifier section as time passes. Telephone with automatic sound amplification circuit.