JPS61101151A - Transfer telephone set - Google Patents

Abstract

PURPOSE:To activate an automatic answering telephone set by connecting the automatic answering telephone set to an incoming line in place of a transfer telephone set so as not to activate a transfer device when a transfer destination is absent in the telephone transfer device selecting the no transfer mode through remote control. CONSTITUTION:When a bell signal comes to a sender trunk line R2, it is detected by an incoming detection circuit 5, the detected output is fed to a control circuit 9, which activates a relay Rl3 to make a relay contact rl3. When a specific remote control signal comes to the line R2 from a transfer destination telephone set succeedingly, a remote control signal is detected by a remote control signal detection circuit 6. Further, the control circuit 9 uses a signal of the detection circuit 6 to give an output to an incoming detection circuit 3 and a changeover relay Rl4 is energized, then a changeover relay Rl4 is switched to connect the automatic answering telephone set to the line R1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone transfer device, and more particularly to a telephone transfer device to which an answering machine can be connected.

[Prior art]

Conventional forwarding telephone devices do not have a terminal for connecting an answering machine, etc., and when two answering machines are connected in parallel, both the answering machine and the forwarding telephone device are activated by a bell signal, so only the one that starts up quickly can be used. There were drawbacks such as the fact that the slow ones could not work.

[Purpose of the invention]

The present invention has been made in view of the above, and is a device for installing a forwarding telephone device and operating the forwarding device when the forwarding destination is absent. To provide a forwarding telephone device which allows an answering machine to operate without any trouble.

[Embodiments of the invention]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

r14. yrl, 4 is a switching relay Rβ4 that switches in conjunction with each other.
It is a contact point, and a switching relay contact r/l. , rl! It is connected to the primary side of the transformer T via one contact of 4□ and via the relay contact rl, and the relay contact rl and the transformer T constitute the station line control circuit 1. ing. A common contact of switching relay contacts rβ43+rN44 is connected to the telephone of the transfer telephone device.

Switching relay contact rβ43. One contact of rβ44 is a switching relay contact r7!41. It is connected to one contact of rj24□. On the other hand, the other contact of the switching relay contact rβ41srA4□ is connected to the external terminal line of the answering machine, and the other contact of the switching relay contact r ff143 + r ff44 is connected to the telephone terminal of the answering machine,
The device is configured to switch between the forwarding telephone device and the answering machine by switching the switching relay Rl 4.

The secondary side of transformer T, 0 is connected to the primary side of transformer T2 via relay contact r12, and the secondary side of transformer T2 is connected to outgoing line R2 via relay contact r13,
The transformer T2 and relay contact RL constitute a station line control circuit 2.

Incoming circuit R via switching relay contacts r14I and r14□
An incoming call detection circuit 3 for detecting a bell signal is connected to R1, and detects an incoming call to the incoming call line R1. Outgoing line R2
A polarity reversal detection circuit 4 is connected to detect the reversal of the polarity of the transmission line R2. An incoming call detection circuit 5 for detecting a bell signal is further connected to the outgoing line R2 to detect an incoming call to the outgoing line R2, and a remote control signal detection circuit for detecting an incoming remote control signal is also connected to the outgoing line R2. 6 is connected. 7 is a response circuit that sends out a message such as "I will transfer you," 8 is a selection signal generator that generates a telephone number signal for the destination, and the output of response circuit 7 is connected to the secondary side of transformer T1. The output of the selection signal generator 8 is supplied to the primary side of the transformer T2.

9 is a control circuit. The control circuit 9 receives the detection output from the incoming call detection circuit 3 and operates the relays Rβ1 and Rj2 . At the same time, the response circuit 7 and the selection signal generator 8 are driven, and upon receiving the first detection output that detects the polarity reversal of the transmission line R2 by the polarity reversal detection circuit 4, the relay RAz is energized, and the transmission line R2 is activated. In response to the second detection output detecting the polarity reversal of R2, relays Rff, ~Rj2. The structure is such that it is controlled to be in a de-energized state. The control circuit 9 also controls the transmission line R2 to turn on the relay RN3 in response to the detection output from the incoming call detection circuit 5, and to turn on the relay Rfi in response to the detection output from the remote control signal detection circuit 6. The switching relay r! is configured to control excitation and de-excitation, and receives a signal detecting a transfer prohibition instruction from the remote control signal detection circuit 6 as described later. 4 from the state shown in FIG.

The operation of an embodiment of the present invention configured as described above will be explained.

First, in the normal transfer mode, when a bell signal arrives on the incoming call line R1, the incoming bell signal is detected by the incoming call detection circuit 3, and the detection output from the incoming call detection circuit 3 is supplied to the control circuit 9.

Relays R11 and R13 are energized by control circuit 9 that receives the detection output from incoming call detection circuit 3, and relay contact r
1. and rl are controlled to be on. At the same time, the response circuit 7 and the selection signal generator 8 are driven by the control circuit 9, and the response circuit 7 outputs, for example, a message "transferring", and this message is transmitted to the transformer T1,
It is supplied to the calling party via relay contact rβ1. Further, the selection signal generator 8 outputs a transfer destination telephone number signal, which is supplied to an exchange (not shown) via the transformer T2 and relay contact rβ3, and the bell of the transfer destination telephone rings via the exchange. When the handset of the transfer destination telephone is picked up by hearing this ring, the polarity of the originating line R2 is reversed. For example, the station line R of the originating line R2 is reversed from positive to negative, and the station L% Lz is reversed from negative to positive. This reversal is detected by the polarity reversal detection circuit 4 and supplied to the control circuit 9 as a first detection output. Relay R13 is excited by control circuit 9 which receives the first detection output, and driving of response circuit 7 and selection signal generator 8 is stopped. As a result, the relay contact rR2 is controlled to be on, and the incoming line R1 and the outgoing line R2 are connected to each other via the relay contact rlz, the transfer operation is completed, and mutual communication becomes possible.

After the transfer call is completed, the call is terminated by placing the handset of the transfer destination phone on the transfer destination phone.

By placing the handset on the transfer destination phone, the outgoing line R2
The polarity of is reversed and returns to its original polarity. Zunawachi outgoing line R
The polarity of the station line L+ of No. 2 is reversed from negative to positive, and the polarity of the station line L2 is reversed from positive to negative, returning to the original state. This reversal is detected by the polarity reversal detection circuit 4 and supplied to the control circuit 9 as a second detection output. Upon receiving the second detection output, the control circuit 9 controls the relay Rj2 + -R(! It enters the state of waiting for the arrival of the bell signal.

Next, a case in which transfer is prohibited will be explained.

When a bell signal arrives on the originating station line R2, the incoming call detection circuit 5
This detection output is supplied to the control output circuit 9, and the control circuit 9 controls the relay R13 to be in the on state, and the relay contact rf3 to be in the on state. Subsequently, when a specific remote control signal arrives from the transfer destination telephone to the originating line R2, the remote control signal is detected by the remote control signal detection circuit 6.

When this remote control signal is a single continuous signal of a specific frequency, the remote control signal detection circuit 6 is as shown in FIG. 2, for example, and the remote control signal is amplified by an amplifier 12.
The signal is supplied to a bandpass filter 13 to extract only a specific frequency component, and its output is integrated by an integration circuit 14.The integrated output is compared with a setting value of a setting device 16 in a comparison circuit 15, and the comparison circuit 15 generates an output. As a result, it is detected that the remote control signal continues for a certain period of time or more.

In addition, the control circuit 9 sends an output to the incoming call detection circuit 3 based on the signal from the remote signal detection circuit 6, and also sends an output to the incoming call detection circuit 3 using the switching relay R (
Since the switching relay R1 is energized, the switching relay R1 is switched from the state shown in FIG. 1 to a state in which the answering machine is connected to the incoming call line R.

Furthermore, by sending another remote control signal, it is possible to return to the transfer mode in which the transfer operation is performed again. in this case,
In response to the remote control signal from the side, the control circuit 9 switches the switching relay R.
ff, is again de-energized. As a result, the switching relay contacts Rla+ to R644 are returned to the state shown in FIG. 1, and the forwarding telephone device is connected to the incoming call line instead of the answering machine.

Furthermore, if the remote side '4'ilI signal is a serial data signal based on FSK or the like, the remote control signal detection circuit 6
As shown in the figure, an amplifier 17 that amplifies the remote control signal, a bandpass filter 18 to which the output of the amplifier 17 is supplied and removes components other than signal components (audio signal, noise, etc.), and an output of the bandpass filter 18 is supplied. and supplies an output to the comparator circuit 15 in place of the output of the integrating circuit 14.
LL circuit 19 may be included.

In this case, the remote control signal is amplified by the amplifier 17, extracted by the bandpass filter 18, the voice signal and noise are removed, the frequency is discriminated by the PLL circuit 19, and the signal is returned to the original serial data signal. This serial data signal is compared with the setting value of the setting device 16 in the comparator circuit 15, and it is determined whether it is a regular remote control signal.

(Effects of the Invention) As described above, according to the present invention, in a telephone transfer device that can select a non-transfer mode by remote control, when the non-transfer mode is selected, the telephone transfer device By connecting the answering machine to the incoming call line, there is no chance that a forwarding phone device that is slow to start up will not work.Also, even if the answering machine is slow to start up, it will not work. do not have.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing an example of a remote control signal detection circuit,
FIG. 3 is a block diagram showing another example of the remote control signal detection circuit. 1 and 2... Office line control circuit, 3 and 5... Incoming call detection circuit, 4... Polarity reversal detection circuit, 6... Remote control signal detection circuit, 7... Response circuit, 8... - Selection signal generator, 9...control circuit, RAI-RI! ,...Relay, rRI-are3...Relay contact, TI and T2...Transformer, 13 and 18...Band pass filter, 14...Integrator circuit, 15...Comparison circuit, 1
6... Setting device, 19... PLL circuit, Rl 4...
・Switching relay.

Claims (1)

[Claims] A forwarding telephone device in which a mode for prohibiting forwarding can be selected by a remote control signal includes relay means for switching and connecting an incoming call circuit to a forwarding telephone device and an answering machine, and selecting a mode for prohibiting said forwarding. and control means for driving the relay means to connect the telephone answering machine and the incoming call line.