JPH06261358A - Telephone exchange - Google Patents

Abstract

PURPOSE:To improve handleability and to hold a call by means of a special number operation even if a general telephone set is connected by providing the holding means of a main wire call and a call by a doorphone and a mutual switching means for the call in a telephone exchange. CONSTITUTION:The main device of the telephone exchange 1 is provided with main wires (telephone lines) L1 and L2, moduler jack inserting terminals MJ1 and MJ2 for a telephone set Ta, terminals T1 and T2 for connecting the general telephone set on the market and the connecting terminals D1 and D2 for the doorphone D. The holding circuit 11, a PB signal (special number operation) reception part 12 and a hooking detection part 13 are provided in the telephone exchange 1. Relays r11, r13, RL2 and RL3 are required for a mutual switching operation for holding the calls. Photocouplers PC1 and PC for detecting the incoming call of the main wires L1 and L2 and for detecting the call and relays r11 and RL1 are provided. The main wire call and the doorphone call can be held if necessary and handleability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone exchange in a home telephone system or the like.

[0002]

2. Description of the Related Art In a conventional home telephone system of this type, the door phone ringing and the outside line incoming are generally provided by ringing the bell of the telephone to notify the user, so that the discrimination is not sufficient and the usage status is displayed. Since there is no means, there is a difficulty that its usage status is unknown.

In order to solve these problems, for example, Japanese Laid-Open Patent Publication No. 1-138844 proposes and discloses a telephone system in which an incoming call state of a telephone outlet can be known and an intercom call or an extension call can be made by connecting a general single telephone. ing.

This telephone system has 1) its main device,
When an external line from the telephone office is connected and an incoming signal from the external line is detected, a sending means for sending this signal through the control line corresponding to the internal line and a connecting means for connecting the external line and the internal line are provided. 2) A telephone outlet is provided with an incoming call display means for receiving an incoming call display signal from a telephone connecting section connected to the extension line and a main device connected to the control line to display an incoming call, and 3). A general single telephone is detachably connected to the telephone connection portion of the telephone outlet.

[0005]

However, in the example of the conventional proposal having the above-described structure, when an incoming call to the intercom is detected during a call to the intercom, it is necessary to terminate the intercom before entering the intercom call. On the contrary, when an incoming call to the station line is detected during the intercom call, it is necessary to end the intercom call before entering the call to the station line.

The present invention has been made in view of the above situation. In order to further improve the usability of this type of telephone exchange, it is possible to hold an intercom call or an office line call, and by a special number operation. , It is intended to provide means for enabling the switching between these two calls.

[0007]

Therefore, according to the present invention, a telephone exchange of this type is provided in a home telephone exchange in which an intercom and a telephone are connected, and means for holding intercom calls and intercom calls are provided. It is intended to achieve the above-mentioned object by being configured so as to include a mutual call switching means.

[0008]

The telephone exchange according to the present invention as described above is
If necessary, it is possible to hold a line call or an intercom call, which improves usability, and even if a general telephone that does not have a hold function is connected, it can be held by a special number operation.

[0009]

EXAMPLES The present invention will be described below based on examples. FIG. 1 shows a functional block diagram of an embodiment of a telephone exchange according to the present invention, and FIG. 2 shows an example of a telephone system using the same.

(Structure) In FIGS. 1 and 2, 1 is a main unit of a telephone exchange, L1 and L2 are office lines (telephone lines), and MJ1.
MJ2 is a modular jack insertion terminal for the telephone Ta, and T1 and T2 are general commercial telephone connection terminals, 1
a is a telephone extension modular, and D1 and D2 are terminals for connecting the intercom D.

Reference numeral 2 is a 4-bit CPU, 3 is a power supply circuit, 4 is an intercom communication circuit, 5 is an intercom button press detection circuit,
6 is a chime sound sending circuit of the intercom D, 7 is a local line L
Reference numerals 1 and 2 denote ringing tone transmitting circuits, and 8 denotes a speaker. 9
Is an analog switch as a means for automatically reducing the chime sound / ring tone of the speaker 8 together with the resistor 9a, and 10 is a volume switch and an on / off switch. Also,
PC1 and PC2 are photocouplers for detecting incoming calls and call detection of the office lines L1 and L2, respectively, and rl1 and RL1 are relays.

The feature of this embodiment resides in that, in order to achieve the object of the invention, a holding circuit 11, a PB signal (special number operation) receiving section 12 and a hooking detecting section 13 are provided in the telephone exchange 1. In addition, rl2, rl3; RL2, R
L3 is each relay necessary for the mutual switching operation of both call holding.

(Operation) Next, an operation sequence of the station line incoming call holding function and the intercom calling / holding function in the above-mentioned configuration will be described with reference to respective flowcharts of FIGS. 3 and 4 and FIG. .

A) Station line communication / call hold function (FIGS. 3 and 1) When a 16 Hz 75 V signal arrives when there is an incoming call on the station lines L1 and L2, in step S1 of FIG. Is activated, and in step S2, C
The PU 2 drives the ring tone sending circuit 7, and the ring tone is output from the speaker 8 in step S3. Then, step S
In step 4, until the loop is detected by the photocoupler PC2 of the call detection circuit by the off-hook of either the telephone set Ta or Tb, the step S2 is repeated, and when it is detected, the ring tone sending circuit 7 is released in step S5. Step S
At 6 the line call is established.

At this time, if the special number operation is detected by the PB signal receiving unit 12 or the hooking detection unit 13 in step S7, the process proceeds to step S8, and the relays RL1, R
L3 is driven to put the station line on hold (step S9), and the intercom D can be supported.

B) Doorphone call / hold (FIGS. 4 and 1) When the detection circuit 5 detects that the button of the doorphone D is pressed in step S10 of FIG. 4, the CPU 2 causes step S11.
Then, the chime sound sending circuit 6 is driven, the relay RL1 is driven in step S12, and the chime sound is sent from the speaker 8 (step S13).

At this time, if the photocoupler PC2 of the call detecting circuit detects a loop in step S14, step S14 is performed.
At 15 an intercom call is established. On the other hand, step S14
After 20 seconds or more have elapsed after the doorphone button was pressed (step S10) without performing the loop detection in step S21, a standby state is set in step S21.

When the PB signal receiver 12 or the hooking detector 13 detects a special number operation in step S16, the relay RL1 is released in step S17, and
In step S18, the relay RL2 is driven to put the intercom call on hold, and it is possible to handle the incoming call from the central office line. In addition,
If no loop is detected in step S14,
In step 20, after pressing the button in step S10,
When more than a second has elapsed, the standby state of step 21 is entered.

[0019]

As described above, according to the present invention, the telephone exchange is provided with the means for holding a call on the line and the intercom and the means for switching the calls, so that the usability is improved and the holding function is improved. Even if you connect a general-purpose telephone that does not have a special telephone number, you can put the call on hold.

[Brief description of drawings]

FIG. 1 is a functional block diagram of an embodiment.

FIG. 2 An example diagram of the telephone system

[Fig. 3] Flowchart of the operation sequence of the incoming call / call hold function of the local line

[Fig. 4] Flowchart of intercom call / hold function operation sequence

[Explanation of symbols]

1 Telephone Switch 11 Hold Circuit 12 PB Signal Receiver 13 Hooking Detector D Doorphone L1, L2 Station Line rl1, rl2, rl3; RL1, RL2, RL3 Relay Ta, Tb Telephone

Claims (1)

[Claims] 1. A telephone exchange, wherein a household telephone exchange in which an intercom and a telephone are connected to each other is provided with holding function means for intercom calls and office line calls and mutual call switching means.