JPH0710077B2 - Call signal transmission control method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a call signal transmission control system for transmitting a call signal from a terminating device to a telephone by a call signal transmitted via a carrier line.

When an extension is extended via a carrier line or a direct line is constructed, the ringing signal transmitted via the carrier line is
Telephones housed in the terminating device of the carrier terminal station may be the same as the intermittent ringing signal sent to the general subscriber line, for example, 1 second on, 2 seconds off, or the like, and may be a continuous ringing signal that is not interrupted. In both cases, it is necessary to send an intermittent ringing signal.

[Conventional technology]

The direct line via the carrier line has, for example, the configuration shown in FIG. 2, and the carrier terminal stations 23, 24 are provided with the terminating devices 25, 26.
And the carrier terminal devices 27 and 28, the terminating devices 25 and 26 accommodate telephones 21 and 22 via subscriber lines, and the carrier terminal device 2
7, 28 are connected by a carrier line 29, and the terminating devices 25, 26 and carrier terminal devices 27, 28 are connected by four lines.

The carrier circuit 29 is usually frequency-multiplexed such as 12-channel multiplexing, and accommodates a direct line corresponding to the multiplicity. Further, the terminating devices 25 and 26 are provided with functions such as call detection of the telephones 21 and 22 and transmission of a calling signal, and are transmitted as a continuous calling signal to the carrier line 29. From the calling signal sending function, for example, an intermittent calling signal of 16 Hz on for 1 second and off for 2 seconds is sent to the telephone sets 21 and 22.

When the extension of the exchange is extended, for example, the configuration shown in FIG. 3 is used. In the figure, 31 and 32 are telephones, 33 and 34 are carrier terminals, 35 and 36 are terminal devices, 37 and 38 are carrier terminal devices, 39 is a carrier line, 40 is an exchange, and LC is a line circuit. is there. Switch 40
The general telephone 31 is accommodated in the line circuit LC of the other, and the terminating device 35, the carrier terminal device 37, the carrier line in the other line circuit LC.
The telephone 32 is accommodated through the carrier terminal device 39, the carrier terminal device 38, and the terminating device 36. The telephone 32 is extended by the carrier line 39 and accommodated in the exchange 40.

In this configuration, from the exchange 40, for example, 1 of 16Hz
Since an intermittent ringing signal of 2 seconds on and 2 seconds off is transmitted, this intermittent ringing signal is transmitted to the terminating device 36 of the carrier terminal station 34 via the carrier line 39 and corresponds to the intermittent ringing signal from this terminating device 36. Then, a call signal similar to the intermittent call signal sent from the exchange 40 is sent to the telephone set 32.

As described above, in the case of the direct line and the extension of the extension, the format of the ringing signal transmitted through the carrier lines 29, 39 is different, and the carrier terminal station 24, 3
It is necessary to make the configuration of the terminators 26 and 36 of 4 different. Therefore, in the case where the carrier terminal station accommodates the lines having different call signal formats as described above, it is necessary to provide two types of terminating devices, resulting in an uneconomical configuration. Therefore, it has been considered to adopt a configuration including a common portion corresponding to such different types of call signals.

FIG. 4 is a circuit diagram of a main part of a conventional example in the case where the above-mentioned common part is included. 41-1 to 41- are telephones, and 42-1 to 42-42.
-N is a universal repeater, 43 is a ringing signal source circuit, 44
Is a carrier terminal, 45 is a relay, 45a is its contact point, 46 is a gate circuit, 47 is a setting switch, 48 is a ring oscillator, 49 is an intermittent oscillator, 50 is an amplifier, 51 is a hybrid circuit for performing 2-wire to 4-wire conversion. is there.

When the ringing signal transmitted through the carrier line is not received, the contact 45a of the relay 45 is in the illustrated state and the telephone 41
-1 to 41-n are separated from the calling signal source circuit 43.
Further, the ringing oscillator 48 of the ringing signal source circuit 43, for example, continuously outputs a 16 Hz sine wave signal and applies it to the amplifier 50 via the gate circuit 46. When the setting switch 47 is turned on, the ringing oscillator 48 is turned on and off. Since the intermittent control signal from the oscillator 49 for turning on for 1 second and off for 2 seconds is applied to the gate circuit 46, the signal from the ring oscillator 48 is applied to the amplifier 50 intermittently. The amplifier 50 is connected to the telephones 41-1 to 41 through the subscriber line.
It is for amplifying and adding to -n, for example, a calling signal having an effective value voltage of 75V.

When a ringing signal transmitted via a carrier line is received,
The incoming call signal is applied to the relay 45 and its contact 45a
Is switched to the ringing signal source line 43 side, so that the ringing signal output from the amplifier 50 is sent to the telephone. At this time, if the setting switch 47 is set to ON, regardless of whether the incoming call signal is a continuous signal or an intermittent signal, it is sent to the telephone as an intermittent call signal. When the setting switch 47 is set to OFF, if the received ringing signal is an intermittent signal, the relay 45 operates intermittently and the continuous signal from the ringing signal source circuit 43 is applied to the contact 45.
It will be interrupted by a, and therefore an intermittent ringing signal will be sent to the telephone.

[Problems to be Solved by the Invention]

Connect the ringing signal source circuit 43 to each universal repeater 42-1 to 42-42.
-N can be commonly set, but the setting switch 47
When set to on, for example, the universal repeater 42
In the case where -1 is for a direct line and universal repeater 42-n is for extension of extension line, the received ringing signal of universal repeater 42-1 becomes a continuous ringing signal, and contact 45a of relay 45 does not connect but gate circuit 46 connects and disconnects. Since the ringing signal output from the ring oscillator 48 is interrupted by the on-off control signal output from the oscillator 49, the on-ring signal is sent to the telephone 41-1.

Further, the reception call signal of the universal repeater 42-n becomes an intermittent call signal, the contact 45a of the relay 45 operates intermittently, and the call signal interrupted by the gate circuit 46 is again contact 45 of the relay 45.
It is interrupted by a. Therefore, there is a drawback that the desired intermittent call signal is not sent to the telephone 41-n due to the difference between the intermittent timing of the relay 45 and the intermittent timing of the gate circuit 46.

An object of the present invention is to enable a desired intermittent call signal to be sent to a telephone when a call signal source circuit is commonly provided for a plurality of universal repeaters.

[Means for Solving the Problem] The paging signal transmission control system of the present invention is designed to perform an intermittent operation only in a universal repeater, which will be described with reference to FIG.

The universal repeaters 2-1 to 2-n respectively accommodating the telephones 1-1 to 1-n are provided with a carrier terminal station 4 having a common call signal source circuit 3 and are adapted to receive call signals received via carrier lines. In the ringing signal transmission control system for transmitting an intermittent ringing signal to the telephone, the universal repeater 2
-1 to 2-n are provided with a gate circuit 6 for applying a reception calling signal to the relay 5 and a setting switch 7 for applying an intermittent control signal to the gate circuit 6, and the calling signal source circuit 3 is provided with a calling signal frequency A ringing oscillator 8 that outputs a signal and a gating oscillator 9 that outputs a gating control signal are provided. When the ringing signal received is a continuous signal, the setting switch 7 is set to ON.
The intermittent control signal from the intermittent oscillator 9 is applied to the gate circuit 6, the received ringing signal is intermittently applied by the gate circuit 6 to the relay 5, and the ringing oscillator 8 is connected via the contact 5a of the relay 5.
The call signal from is intermittently sent to the receiving telephone.

When the incoming call signal is an intermittent signal, the setting switch 7 is set to OFF, the incoming call signal is applied to the relay 5 via the gate circuit 6, and the call from the ring oscillator 8 is made via the contact 5a of the relay 5. The signal is intermittently sent to the called telephone.

When the called telephone goes off-hook in response to the calling signal, the carrier terminal 4 detects the off-hook and stops sending the calling signal, so that the telephones 1-1 to 1-n are connected to the hybrid circuit 11. .

[Action]

Whether it is a line that transmits a continuous ringing signal such as a direct line,
Alternatively, since it is known at the time of constructing the system whether the line for transmitting the intermittent ringing signal such as an extension line is set, the setting switch 7 is set according to the format of the ringing signal. For example, when the universal repeater 2-1 is connected to a line such as a direct line through which a continuous ringing signal is transmitted, the setting switch 7 is set to ON, and the universal repeater 2-n transmits an intermittent ringing signal such as an extension line. When it is connected to the transmission line, the setting switch 7 is turned off.

Therefore, when a reception ringing signal is applied to the universal repeater 2-1, the gate circuit 6 operates intermittently by the intermittent control signal from the intermittent oscillator 9, whereby the relay 5 operates intermittently. The call signal of is interrupted and sent to the receiving telephone set 1-1.

Further, when a reception call signal is applied to the universal repeater 2-n, it is applied to the relay 5 via the gate circuit 6, and the relay 5 intermittently operates according to the reception call signal, and the call oscillator 8
The ringing signal as a continuous signal from the contact 5a of the relay 5
And is sent to the telephone 1-n.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a circuit diagram of a main part of an embodiment of the present invention.
1-n is a telephone, 2-1 to 2-n are universal repeaters, 3 is a calling signal source circuit, 4 is a carrier terminal station, 5 is a relay,
5a is a contact, 6 is a gate circuit, 7 is a setting switch, 8 is a ring oscillator, 9 is an intermittent oscillator, 10 is an amplifier, and 11 is a hybrid circuit for performing 2-wire to 4-wire conversion.

As described above, the carrier terminal 4 has a plurality of telephones 1-1 to 1-1.
Universal repeaters 2-1 to 2-n for 1-n,
A call signal source circuit 3 common to these universal repeaters 2-1 to 2-n is provided.

The universal repeaters 2-1 to 2-n are provided with a gate circuit 6 for applying a reception call signal to the relay 5 and a setting switch 7, and the telephones 1-1 to 1-n are connected to the hybrid circuit 11 by a contact 5a of the relay 5. Switching to the calling signal source circuit 3 is performed. The ringing signal source circuit 3 includes, for example, a ringing oscillator 8 that continuously outputs a 16 Hz sine wave signal, an amplifier 10 that amplifies the output signal, and an intermittent control control signal that is on for 1 second and off for 2 seconds. And an intermittent oscillator 9 for outputting the intermittent control signal, and the intermittent control signal is transmitted to each of the universal repeaters 2-1 to 2-n.
Is added to the setting switch 7 of.

When the setting switch 7 is set to ON, the gate circuit 6
Intermittent operation is performed by the intermittent control signal from the intermittent oscillator 9, and when the received call signal is a continuous signal, the relay 5 operates intermittently and the continuous signal from the oscillator 8 is called by the contact 5a. It is intermittently sent and sent to the telephone.
When the setting switch 7 is set to OFF, when the received ringing signal is an intermittent signal, the relay 5 is intermittently operated, and the continuous ringing signal from the ringing oscillator 8 is intermittently transmitted by the contact 5a to the telephone. It

Therefore, in a universal repeater in which a continuous ringing signal is transmitted by a carrier line like a direct line, the setting switch 7 is set to ON and an intermittent ringing signal is transmitted by a carrier line like an extension line. In the universal repeater according to the present invention, the setting switch 7 may be set to OFF, and even if the format of the calling signal transmitted by the carrier line is different, the calling signal source circuit 3 is provided in common to make it economical. Can be achieved. Further, the gate circuit 6 provided in each of the universal repeaters 2-1 to 2-n can be configured by one transistor, and the setting switch 7 can be configured by a small thumb switch or the like. Therefore, universal repeaters 2-1 and 2
-N is not complicated and large.

〔The invention's effect〕

As described above, according to the present invention, each universal repeater 2-1 to 2-n is provided with the gate circuit 6 and the setting switch 7, and the universal repeaters 2-1 to 2-n commonly use the call signal source. With the circuit 3 provided, each of the universal repeaters 2-1 to 2-n can have the same configuration, and only by setting the setting switch 7 according to the format of the ringing signal transmitted by the carrier line, Since the intermittent call signal of a desired cycle can be sent to the called telephone, there is an advantage that the carrier terminal station 4 can be economically constructed.

[Brief description of drawings]

FIG. 1 is a circuit diagram of an essential part of an embodiment of the present invention, FIG. 2 is an explanatory diagram of a direct line, FIG. 3 is an explanatory diagram of extension of an extension, and FIG. 4 is a circuit diagram of an essential part of a conventional example. 1-1 to 1-n are telephones, 2-1 to 2-n are universal repeaters, 3 is a calling signal source circuit, 4 is a carrier terminal station, 5 is a relay, 5a is a contact, 6 is a gate circuit, and 7 is a setting. Switch, 8 is ring oscillator, 9 is intermittent oscillator, 10 is amplifier, 11
Is a hybrid circuit.

Claims (1)

[Claims] 1. A carrier terminal station (4) having a ringing signal source circuit (3) common to universal repeaters (2-1 to 2-n) accommodating telephones (1-1 to 1-n), respectively. ,
In a ringing signal transmission control system for transmitting an intermittent ringing signal to the telephones (1-1 to 1-n) in response to a ringing signal received via a carrier line, the universal repeater (2-1 to 2) -N), a gate circuit (6) for applying the reception ringing signal to the relay (5)
And a setting switch (7) for applying an intermittent control signal to the gate circuit (6), a ring oscillator (8) for outputting a signal of a ring signal frequency to the ring signal source circuit (3), and an on / off control. An intermittent oscillator (9) for outputting a signal is provided, and when the reception ringing signal is a continuous signal, the setting switch (7) is set to ON, and the intermittent control signal from the intermittent oscillator (9) is set to the above. In addition to the gate circuit (6), the reception ringing signal is intermittently applied by the gate circuit (6) to the relay (5), and the ringing from the ringing oscillator (8) is performed via the contact of the relay (5). The signal is intermittently sent to the incoming telephone, and when the received ringing signal is an intermittent signal, the setting switch (7) is set to OFF, and the received ringing signal is transmitted via the gate circuit (6). In addition to the relay (5), Call signal transmission control method, characterized in that via the contact is sent to the incoming phone intermittently a call signal from the calling oscillator (8)).