JPH0243870A - Transfer controller - Google Patents

Abstract

PURPOSE:To use both services altogether by providing a DC cut-off means and a feeding means and identifying a hooking signal for terminal changeover from a hooking signal for hooking service of an exchange. CONSTITUTION:The hooking of a telephone set terminal 11 is not sent to a line reaching an exchange 12 by a DC cut-off circuit 3 and when a hooking detection circuit 6 identifies a long hooking signal for terminal changeover, a standby tone transmission circuit 7 sends a standby tone to a caller terminal equipment. Simultaneously, a ringing transmission circuit 8 is driven and an incoming signal is sent to a FAX terminal equipment 10, and when the terminal equipment hooks off, a loop detection circuit 9 detects the hook-off and a line switching circuit 1 switches a telephone subscriber line 13 to the position of the FAX terminal equipment 10. When a short hooking signal is identified to be a hooking signal for hooking service by the hooking detection circuit 6, no terminal changeover control is applied, a loop forming circuit 2 is controlled and the hooking signal is recovered and relayed to the telephone subscriber line 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a method for connecting telephone terminals and
The present invention relates to a transfer control device that switches between terminals such as AX (fax) terminals.

[Conventional technology]

A telephone terminal connected to a telephone subscriber line connected to an exchange and connected to one telephone subscriber line, for example, an FA
There is a switching device between the X terminals that switches the connection to the FAX terminal after receiving a call to the telephone terminal, that is, controls transfer. Connection to telephone terminals is made only through telephone subscriber lines and switching devices. Some switching devices of this type perform transfer control by hooking from a telephone terminal.

[Problem to be solved by the invention]

In the conventional transfer device described above, hooking at a telephone terminal is transmitted directly to the telephone exchange. Therefore, when a subscriber registered with the hooking service transfers an incoming call to a fax terminal by hooking, for example, the hooking service is activated at the same time as switching to the fax terminal.
The disadvantage is that users of conventional switching devices cannot receive hooking services.

An object of the present invention is to eliminate such drawbacks, and to provide a system between a telephone terminal and a fax terminal, so that after a call is received at the telephone terminal, the connection can be switched to this terminal, and a hooking service can be received. The purpose of the present invention is to provide a transfer control device.

[Means to solve the problem]

The present invention accommodates a telephone terminal and a second terminal, is connected to an exchange via a single telephone subscriber line, and after a call is received at the telephone terminal, is forwarded to the second terminal by a hooking signal. In the control device, when the hooking signal output from the telephone terminal is identified as being for terminal switching, the single telephone subscriber line is switched to one terminal to which the second terminal is connected, and the hooking signal output from the telephone terminal is switched to one terminal to which the second terminal is connected. switching means for switching the single telephone subscriber line to the other terminal when the hooking signal output from the terminal is identified as being for hooking service to the exchange; , loop forming means for forming a DC loop via the switching means, and reproducing and relaying the hooking signal to the switching means when the hooking signal output from the telephone terminal is identified as being for a hooking service to the exchange; and, when a DC loop is formed with the exchange by the loop forming means and signal transmission is possible between the exchange and the telephone terminal, cutting the DC component from the exchange and the hooking signal from the telephone terminal. DC cutting means; supplying means for supplying direct current to the telephone terminal in place of the direct current cut by the direct current cutting means; or identification means for identifying whether the service is for hooking service to the exchange or the exchange.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In this embodiment, the switch 12 is connected via a single telephone subscriber line 13.
The telephone terminal 11 and the FAX terminal 12 are switched by hooking the telephone terminal 11. Furthermore, in this embodiment, two types of hooking signals are provided in order to receive the hooking service of the exchange 12. In the case of a normal hooking time (0.5 to 1 second), the hooking signal is used for hooking service to the exchange 12, and in the case of a long hooking time (1 to 3 seconds), it is used as a hooking signal for terminal switching, which is 1 to 3 seconds. The longer the hooking time is, the longer the hooking time is and the longer the cutting. The transfer control device according to this embodiment includes a line switching circuit 1, a standby sound output path 7, a loop forming circuit 2, a DC cut circuit 3, a power supply circuit 4, a hooking detection circuit 6, and a loop detection circuit. It includes circuits 5 and 9 and a ringing sending circuit 8.

In such a transfer control device, the line switching circuit 1
Connect the telephone subscriber line 13 connected to terminal 1a to terminal 1
Switch between terminal b and terminal 1c.

The standby sound sending circuit 7 is connected to the terminal 1b of the line switching circuit 1, and outputs a standby sound (voice) to a calling terminal not shown in FIG.

The loop forming circuit 2 normally cuts off the direct current and passes the alternating current, and forms a direct current loop when a loop is instructed.

The DC cut circuit 3 connects the loop forming circuit 2 and the telephone terminal 11.
When a DC loop is formed by the loop forming circuit 2 and the telephone terminal 11 is ready to make a call, the DC component from the exchange 12 and the telephone terminal 11 are connected to each other.
Cut the hooking signal from.

The power supply circuit 4 is connected to the DC cut circuit 3 and supplies DC to the telephone terminal 11 in place of the DC cut by the DC cut circuit 3.

The hooking detection circuit 6 is connected to the DC cut circuit 3, detects hooking of the telephone terminal 11, and distinguishes between a hooking signal for hooking service and a hooking signal for terminal switching.

The loop detection circuit 5 is connected to the DC cut circuit 3 and detects an off-footer of the telephone terminal 11.

The ringing sending circuit 8 is connected to the terminal 1c of the line switching circuit 1, and sends an incoming signal (ringing) to the FAX terminal 10, which is also connected to the terminal 1c of the line switching circuit 1.
Send out.

The loop detection circuit 9 is connected to the terminal IC of the line switching circuit 1, and detects off-hook of the FAX terminal 10.

Next, the operation of this embodiment will be explained.

An incoming signal (ringing) from the exchange 12 is sent to a line switching circuit 1, a loop forming circuit 2 that is cut as a direct current and passed through an AC valve under normal conditions, and a loop forming circuit 2 that forms a DC loop when a loop is specified, and a DC cut circuit 3. The bell of the telephone terminal 11 is rung via . At this time, direct current is supplied to the telephone terminal 11 by the power supply circuit 4 . When the off-footer of the telephone terminal 11 is detected by the loop detection circuit 5, the loop forming circuit 2 forms a DC loop, and the telephone terminal becomes ready for communication.

Next, when the telephone terminal 11 performs hooking for terminal switching, the hooking detection circuit 6 detects this hooking. This hooking of the telephone terminal 11 is not transmitted to the line to the switchboard 2 by the DC cut circuit 3. When the hooking detection circuit 6 detects this hooking and identifies the hooking signal for terminal switching, the standby sound sending circuit 7 sends out a standby sound (voice) to the calling terminal, and at the same time,
The ringing sending circuit 8 is driven and an incoming signal is sent to the FAX terminal 10. This incoming signal is sent to the FAX terminal 11.
is detected and becomes off-hook, the loop detection circuit 9
detects this off-hook, and the line switching circuit 1 switches the telephone subscriber line 13 to the FAX terminal 10.

At this time, the ringing sending circuit 8 stops sending out the ringing and the standby sound sending circuit 7 stops sending out the standby sound. and F
The AX terminal 10 becomes able to receive signals from the exchange 12.

Furthermore, when the telephone terminal 11 performs hooking for the hooking service to the exchange 12, the telephone terminal 11 sends out a short hooking signal. That is, the telephone terminal 11
The short hooking signal from the hooking detection circuit 6
If the hooking signal is determined to be a hooking signal for a hooking service, no terminal switching control is performed, and the loop forming circuit 2 is controlled to regenerate and relay the hooking signal to the telephone subscriber line I3.

Note that the line is disconnected by monitoring the on-hook state of the FAX terminal 10 using the loop detection circuit 9.

〔Effect of the invention〕

As explained above, the present invention has a DC cut means and a power supply means, and furthermore, by identifying a hooking signal for terminal switching and a hooking signal for an exchange hooking service, it is possible to provide both services together. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Line switching circuit 2...Loop formation circuit 3...DC cut circuit 4...Power supply circuit 5.9...Loop detection circuit 6...Hooking detection circuit 7...Standby sound sending circuit 8...Ringing sending circuit 10...Fax terminal 11...Telephone terminal 12・ ·switch 13. ・Telephone subscriber line

Claims (1)

[Claims] (1) Transfer control that accommodates a telephone terminal and a second terminal, is connected to an exchange via a single telephone subscriber line, and transfers a call to the second terminal using a hooking signal after a call is received at this telephone terminal. In the apparatus, if the hooking signal output from the telephone terminal is identified as being for terminal switching, switching the single telephone subscriber line to one terminal to which the second terminal is connected;
switching means for switching the single telephone subscriber line to the other terminal when the hooking signal output from the telephone terminal is identified as being for hooking service to the exchange; and connecting to the other terminal of the switching means. and forming a DC loop via the switching means, and reproducing and relaying the hooking signal to the switching means when the hooking signal output from the telephone terminal is identified as being for a hooking service to the exchange. forming means; when the loop forming means forms a DC loop with the exchange and the exchange and the telephone terminal become capable of transmitting signals, the DC loop from the exchange and the hooking signal from the telephone terminal are transmitted. a direct current cutting means for cutting, a supply means for supplying direct current to the telephone terminal in place of the direct current cut by the direct current cutting means, and a terminal in which a hooking signal output from the telephone terminal is switched to the second terminal. 1. A transfer control device comprising: identification means for identifying whether the transfer is for switching or for hooking service to the exchange.