JP2810404B2 - Data communication device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication device for transmitting a call signal for calling a connected telephone.

2. Description of the Related Art Conventionally, there has been a facsimile apparatus to which an answering machine can be connected. In such a facsimile apparatus, an answering machine call signal is generated inside the facsimile apparatus, and the answering machine is activated.
Further, in order to simplify the configuration of a circuit for generating a calling signal, some devices output a square wave instead of a sine wave.

[Problems to be Solved by the Invention] However, answering machines are designed to respond to a sine wave ringing signal. Therefore, there has been a problem that a response to a square-wave paging signal (pseudo-paging signal) is delayed or does not respond at all.

[Means for Solving the Problems] The present invention solves the above problems even if various external telephones that can be activated by a call signal from the telephone network are connected to the data communication device. An object of the present invention is to make it possible to promptly and surely start up an external telephone by generating and transmitting a call signal suitable for the external telephone in a data communication device.

The present invention, in order to achieve the above object, in a data communication device for performing data communication via a telephone network, connecting means for connecting an external telephone such as an answering machine which can be activated by a call signal from the telephone network, Generating means capable of generating a plurality of types of a plurality of call signals including a first call signal and a second call signal for activating an external telephone; Storage means for determining a call signal capable of activating the external telephone connected by the means, and storing information for specifying the determined call signal in a memory; In response, the generating means generates a calling signal corresponding to the information stored in the storage means, and a transmitting means for transmitting the generated calling signal to the external telephone. Detecting means for detecting that the external telephone is activated in response to a call signal transmitted by the means; and forming a communication path between the telephone network and the external telephone in response to the detection of the detecting means. There is provided a data communication device having means.

First Embodiment FIG. 2 is a block diagram showing a configuration of a facsimile apparatus according to an embodiment of the present invention. A CPU (Central Processing Unit) 1 controls the entire facsimile apparatus according to a program recorded in a ROM (Read Only Memory) 2.

The non-volatile memory 4 reliably stores data to be stored even when the power of the facsimile machine is turned off.

The recording unit 6 takes out recording data stored in a RAM (random access memory) 3 under the control of the CPU 1 and prints out the data as a hard copy.

The reading unit 7 binarizes data read using a CCD (charge storage element) under the control of the CPU 1 and sequentially sends the binarized data to the RAM 3.

The modem unit 8 is composed of G3, G2, G1, and FM modems, and a clock generation circuit and the like connected to these modems, modulates transmission data stored in the RAM 3 under the control of the CPU 1, Via the telephone line 10. Further, the modem section 8 introduces an analog signal of the telephone line 10 via the NCU 9, demodulates the analog signal, and stores the binarized data in the RAM 3.

The NCU 9 connects the telephone line to the modem unit 8 under the control of the CPU 1.
Alternatively, it is switched to either the main telephone section 11 or the answering machine 16 for connection.

Reference numeral 16 denotes an answering machine connected to the facsimile apparatus. Reference numeral 21 denotes a pseudo-Ci generation unit that outputs a square-wave pseudo-call signal (Ci signal) to the answering machine 16. 22 is line 10
This is a Ci detection unit that detects a call signal from the Internet.

FIG. 2 shows the configuration of the network control unit (NCU). 17 and 20 are relays. 18 and 19 are main phone and answering machine respectively
This relay detects 16 responses.

First, the fact that the answering machine 16 is connected is registered in the non-volatile memory 4 by a software switch or the like. CPU 1 receives an incoming call from line 10 (step S
1) Before the answering machine 16 answers, the relay 20 is switched to the side (the pseudo Ci generation unit 21 side) (Step S2),
The detection unit 22 detects Ci (step S3). Ci
If so, the relay 17 is switched to the side (modem 8 side) to capture the line (step S4), and it is determined whether the incoming call is from a facsimile or a telephone (step S5). If it is determined that the incoming call is from a telephone, the software switch is checked (step S6).

If the answering machine is set to be connected, in order to activate the answering machine, the pseudo Ci generating unit 21 performs the pseudo Ci of the square wave of the frequency registered in the nonvolatile memory 4 a predetermined number of times or a predetermined number. Output the time (step S7). The answering of the answering machine is detected by the off-hook detecting current relay 19 (step S8). If the answering machine 16 does not answer after outputting the pseudo Ci for a predetermined number of times or for a predetermined time, the frequency of the pseudo Ci to be output next is sequentially switched from a plurality of frequencies predetermined in the nonvolatile memory 4. (Step S9). In this way, the answering machine is surely answered by creating the optimum pseudo Ci. FIG. 4 shows the timing of the pseudo Ci in the loop of steps S7 to S9.

In step S8, when the answer of the answering machine is detected, the CPU 1 stores the frequency of the pseudo Ci at that time in the nonvolatile memory 4.
(Step S10). Then, next time, the pseudo Ci of this frequency is output.

Further, in step S11, the CPU 1 switches the relay 17 to the side. Then, the answering machine outputs a response message to the line 10, and then records the message from the line 10.

As described above, in the present embodiment, when the answering machine 16 does not respond even after outputting the pseudo Ci signal for a predetermined time, by sequentially switching a plurality of preset frequencies and changing the frequency of the pseudo Ci signal, The answering machine 16 can be activated reliably. Further, in the present embodiment, the responded frequency is stored in the nonvolatile memory 4, and the pseudo Ci after the second time uses the frequency stored in the nonvolatile memory 4. Therefore, in this embodiment, the second answering machine
16 can be started immediately.

Second Embodiment FIG. 5 shows the configuration of a key telephone system embodying the present invention.

105 is a dedicated telephone. Dedicated telephone 105 is main unit 101
And a 4-wire key telephone connected via a communication line 103 and a control line 104. Reference numeral 122 denotes a main device interface. Main device interface 122 receives a control code such as a call code from main device 101 and transmits a control code such as an off-hook code to main device 101. The dedicated telephone 105 is connected to a two-wire facsimile via a telephone line 106.

117 is a relay 1 connecting the main unit 101 and the facsimile 107
19 is a pseudo-Ci generator, 124 is a non-volatile memory, and 121 is a control circuit.

Main device 101 has a function of exchanging a plurality of dedicated telephones.
On the other hand, the dedicated telephone 105 serves as an adapter for connecting the facsimile 107 to the main device 101.

Based on the flowchart of FIG.
Will be described.

When the main unit interface 122 detects the calling code (step S61), the control circuit 121 causes the nonvolatile memory 124
A square wave of a frequency registered in advance to the pseudo Ci generator
119, and a facsimile 107
(Step S62). Then, the response of the facsimile 107 to the pseudo Ci is detected based on the generation and disconnection of the DC loop of the communication line 106 (step S63).
Here, if facsimile 107 does not respond, square wave C
The frequency of i is changed (step S64), and the pseudo Ci is transmitted again (step S62).

On the other hand, when detecting the response of the facsimile 107 in step S63, the control circuit 121 registers the frequency of the square wave Ci at the time when the facsimile 107 responds to the nonvolatile memory 124 (step S65). Further, the relay 117 is switched, and the telephone line 103 is switched.
And the facsimile 107 are connected (step S66). Thereafter, facsimile communication by facsimile 107 is performed.

Thus, also in the present embodiment, the facsimile 107 can be started reliably. Next time, Facsimile 10
7 is activated immediately by transmitting a square wave of the frequency registered in the non-volatile memory 124.
7 can be started.

[Effects of the Invention] According to the present invention, even if various external telephones that can be activated by a call signal from the telephone network are connected to the data communication device, the data communication device generates a call signal suitable for the external telephone. Since the external telephone can be generated and transmitted, the external telephone can be started quickly and surely.

[Brief description of the drawings]

FIG. 1 is a block diagram of an NCU according to a first embodiment of the present invention, FIG. 2 is a block diagram of a facsimile apparatus of the first embodiment, FIG. 3 is a flowchart of the first embodiment, and FIG. FIG. 5 is a block diagram of the key telephone system of the second embodiment of the present invention, and FIG. 6 is a flowchart of the second embodiment. 1 is a CPU, 4 is a non-volatile memory, 9 is an NCU, 16 is an answering machine, 17 is a relay, 19 is an off-hook detection relay of an answering machine, 20 is a relay, 21 is a pseudo Ci generation unit, 22 is a Ci detection unit, 10
7 is a facsimile, 117 is a relay, 119 is a pseudo Ci generator, 1
21 is a control circuit, and 124 is a nonvolatile memory.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04M 3/02-3/06 H04M 11/00-11/10

Claims (1)

(57) [Claims] 1. A data communication apparatus for performing data communication via a telephone network, comprising: a connection means for connecting an external telephone such as an answering machine which can be activated by a call signal from the telephone network; Generating means capable of generating a plurality of types of a plurality of paging signals including a first paging signal and a second paging signal; and the external device connected by the connecting means from a plurality of paging signals generated by the generating means Storage means for determining a call signal capable of activating a telephone, and storing information for specifying the determined call signal in a memory; and storing the information in the storage means in response to a call from the telephone network. Sending means for causing the generating means to generate a calling signal corresponding to the information being sent, and sending the generated calling signal to the external telephone; and a calling signal sent by the sending means. Detecting means for detecting that the external telephone is activated in response to a call, and communication path forming means for forming a communication path between the telephone network and the external telephone in response to the detection of the detecting means. Data communication device.