JPS63263966A - Method for detecting terminal call signal - Google Patents

Abstract

PURPOSE:To attain switching connection of a line to a telephone set or a terminal equipment by detecting surely a terminal device call signal as an intermittent signal coming from the line without malfunction after the closing of a DC loop of the line. CONSTITUTION:When a 16Hz call signal comes from telephone lines L1, L2, the signal is detected by a telephone set call signal detecting means 12 and its output signal is fed to a control means 17 to form a DC loop. When a called party hooks off a handset of a telephone set 6, it is detected by a loop detection means 14 and its output signal is fed to the means 17. The means 17, based on the output signal, gives a command signal, a contact 10 is closed and the telephone lines L1, L2 are switched to the position of the telephone set 6, then telephone communication with the called party is attained in case of a telephone call from the caller.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a method for detecting a terminal calling signal, and in particular, when detecting a calling signal arriving via a subscriber telephone line and switching the line to a telephone or terminal device. This invention relates to a useful method for detecting a calling signal. [Prior Art] Recently, various terminal devices such as facsimile machines have been attached to subscriber telephone lines. Conventionally, for example, when a facsimile machine detects a telephone ringing signal, the line is automatically switched to the facsimile machine, and the facsimile machine takes priority and the telephone is ignored. This has caused the inconvenience that these devices cannot be used effectively due to the lines.

[Purpose of the invention]

The present invention was devised to solve the above-mentioned inconveniences, and provides a method for detecting a ringing signal that is useful for switching and connecting lines to telephones or terminal devices, and effectively connecting these devices with a single line. It is intended to be used.

[Summary of the Invention] The present invention detects a terminal device paging signal that arrives via the line after the DC loop of the line is closed, and detects the same paging signal as an intermittent signal in which transmission and pause of a constant frequency are repeated within a predetermined time. It attempts to detect signals.

(Example〕 Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

First, the overall configuration will be explained with reference to Figure 1.
In the figure, 1 is a terminal call control device, 2.3.4 is a pushbutton switch provided at the lower part of the control device 1, and these pushbutton switches 2.3.4 can be operated by the user's switch operation. The mode selection function can be switched when you are at home (at work) or when you are away. 5 is also the control device 1
It is an openable/closable cover member provided at the lower part of the cover, and when the cover member 5 is opened, a microphone and switches (shown in the diagram) for an IC recording means for recording telephone answering messages are inside. It is provided.

6 is a telephone, 7 is a facsimile device as a terminal device,
8.9 is a connection code for connecting the terminal call control device 1 to the telephone 86 and facsimile device 7.

Next, the configuration of the control circuit of the terminal call control device 1 will be explained with reference to FIG. Further, a facsimile device 7 is connected to the meter contact side of the contact 11. 12 is 1
611゜ Telephone ringing signal detection means for detecting a ringing signal, and the output signal of this detection means 12 causes the number of times
LI.

L2 is configured to close a DC loop as is well known. , 13 is a ringing signal detection means for detecting a facsimile machine ringing signal, and this ringing signal detection means 13 is connected to the line L1. This detects the intermittent signal of the CNG signal, ie, l100H, which arrives via L2, is transmitted for 0.5 seconds, paused for 0-3 seconds, and transmitted for 0.5 seconds. 14 is phone ja
6, a loop detecting means for detecting a response; 15, an IC recording means for transmitting a prerecorded telephone response message from the called side to the calling side; 1;
Reference numeral 6 indicates a recording means for recording a message from the calling party, and 17 indicates a control means for performing various controls such as switching and connecting the lines L, . has been done.

Subsequently, the operation of this embodiment will be explained. When the pushbutton switch 2 of the terminal call control device 1 is pressed to set the first mode selection function, that is, the at-home mode, when a 16H2 call signal arrives from the telephone lines Ll and L2, this is sent to the telephone. It is detected by the calling signal detection means 12, and its output signal is applied to the control means 17 to form a DC loop. When the called party hangs up the handset of the telephone 6, this is detected by the loop detection means 14, and its output signal is applied to the control means 17. The control means 17 issues a command signal based on this output signal, the contact 10 is activated, and the line is connected.

is switched to the telephone 6 side, so if the calling party is making a telephone call, telephone contact will be made with the called party. on the other hand,
If the calling party is a facsimile machine, 1100H2CNG
The signal arrives as an intermittent signal that is sent for 0.5 seconds, paused for 3 seconds, and sent for 0.5 seconds, and this calling signal is detected by the facsimile machine calling signal detection means 13, and its output signal is applied to the control means 17. When the called party hears this ringing signal and puts the handset on the hook, the contact point 11 is activated based on the command signal from the control means 17, and the line L1,
L2 is switched to the facsimile device 7 side, and the facsimile device 7 is further activated by the facsimile device activation command signal. From then on, the called party identification signal, i.e. 2
The message is received by sending the 100H2CED signal to the calling party and executing a known protocol. Further, the pushbutton switch 3.4 of the terminal call control device 1 is used to set the mode selection function when the user is away, etc., and when the calling party is making a telephone call, the above-mentioned first mode selection function is used. Similarly to the setting, after the DC loop is closed, the IC recording means 15 is activated and a pre-recorded response message indicating that the caller is away is sent to the calling party, and the recording means 16 is activated as necessary. It is activated to record the caller's message. On the other hand, when the calling party is a facsimile machine, a facsimile machine call signal is detected by the call signal detecting means 13, and based on this detection, contacts 10 and 11 are activated to connect the line, and I2 is automatically sent to the facsimile machine 7 side. After switching, message reception is performed in the same manner as described above, but detailed explanations of these operations will be omitted since they are not directly related to the present invention.

[Effects] As described above, according to the present invention, after the direct current loop of the line is closed, a terminal device calling signal as an intermittent signal arriving from the line is reliably detected without malfunction, and the line is switched to a telephone or terminal device. This has the excellent effect that the telephone and the terminal device can be used effectively and economically by using only one line without installing a new line.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, with FIG. 1 being an overall configuration diagram and FIG. 2 being a block diagram of a control circuit. ■...Terminal call control device 6...Telephone 7...Terminal device (facsimile device) 10.11...
・Contact I2...Telephone call signal detection means 13...Terminal call signal detection means I4...Loop detection means 17...Control means

Claims (2)

[Claims] (1) When detecting a terminal device paging signal that arrives via the same line after the DC loop of the line is closed, it is necessary to detect the same paging signal as an intermittent signal in which transmission and pause of a certain frequency are repeated within a predetermined time. Characteristic terminal call signal detection method. (2) The calling signal is sent out for 0.5 seconds at 1100Hz, 3
2. The method for detecting a terminal call signal according to claim 1, wherein the facsimile call signal is a facsimile machine call signal consisting of an intermittent signal that is paused for 0.5 seconds and then sent for 0.5 seconds.