JPH01183945A - Telephone set - Google Patents

Abstract

PURPOSE:To enhance an operability by continuing a line close for a constant time set beforehand, even after the on-hooking of the handset of a telephone set. CONSTITUTION:When an incoming signal from a line 7 is detected by an incoming call detecting circuit 6 and a handset 1 is picked up, a line closing circuit 4 closes the line 7, and a telephone line network 3 is made into a callable condition by the handset 1. Next, when a hook switching circuit 2 detects the on-hook of the handset 1, the detecting signal is sent to a timer circuit 5. When the timer circuit 5 receives the detecting signal, it starts the counting of the constant time set beforehand, and after the constant time set beforehand, a release instruction signal is sent to a line closing circuit 4 so as to release the line 7. Thus, when a calling is continued by switching the telephone set, which has detected the incoming call and has been hooked off, to the other telephone set, the troublesome operation is completely made unnecessary.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to telephones.

[Conventional technology]

Traditionally, when a telephone picks up the handset or goes off-hook, the hook switch turns on and closes the line.

Also, when the handset is put down, that is, when it goes on-hook, the hook switch is turned off and the line is released.

[Problem that the invention seeks to solve]

With the conventional telephones mentioned above, the line is immediately released and the call is disconnected when the handset is put on the hook, so multiple telephones can be connected to a single line through a branch connection or a changeover switch. In some cases, for example, if a telephone is installed in the workplace on the first floor and the living room on the second floor of a residence and used with a branch connection, the telephone on the second floor detects an incoming call and goes off-hook, and then goes back to the second floor. If you have to call someone to take over the call, or if you want to continue the call on the phone on the first floor after moving to work on the - floor, leave the phone on the second floor off-hook, put the line on hold, and go to the first floor. go to call or
- Since it is necessary to move to the second floor, it is time consuming to return to the second floor telephone and turn it on-hook after the telephone handover is completed or after the end of the call, and sometimes the second-floor telephone is left off-hook. The disadvantage is that it may cause inconvenience or inconvenience.

[Means for solving problems]

The telephone of the present invention includes a line closing circuit that closes the line when the handset is off-hook, and a signal that counts a preset fixed time after detecting on-hook and causes the line closing circuit to open the line after the fixed time. It has a timer circuit that sends out.

〔Example〕

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

FIG. 1 is a functional block diagram showing one embodiment of the present invention.

In FIG. 1, the telephone of this embodiment includes a handset 1, a hook switch circuit 2 that detects on-hook/off-hook of the handset 1, an incoming call detection circuit 6 that detects an incoming signal from a line 7, and a hook switch circuit 2 that detects an incoming signal from a line 7. A line closing circuit 4 that closes the line 7 after off-hook detection; a telephone circuit network 3 that includes a dial circuit, a telephone circuit that connects to the handset 1 and the line 7; and a hook switch circuit 2 that are preset after on-hook detection. The timer circuit 5 sends a signal to the circuit closing circuit 4 to open the line 7 after a certain period of time.

Next, the operation of this embodiment will be explained.

First, when an incoming signal from the line 7 is detected by the incoming call detection circuit 6 and the handset 1 is lifted, the hook switch circuit 2 goes off-hook, the line closing circuit 4 closes the line 7, and the telephone circuit The network 3 becomes available for communication with the handset 1.

Next, when the hook switch circuit 2 detects that the handset 1 is on-hook, it sends the detection signal to the timer circuit 5. When the timer circuit 5 receives this detection signal, it starts counting a preset fixed time, and sends an open command signal to the line closing circuit 4 to open the line 7 after a preset fixed time.

The line closing circuit 4 opens the line 7 upon receiving the open command signal.

〔Effect of the invention〕

As explained above, the present invention continues to close the line for a preset period of time even after the handset of the telephone is on-hook. , when you move from one phone that detects an incoming call and goes off-hook to another phone to continue the call, as in the past, you turn off the handset to put the line on hold, and then switch back to the original phone when the call ends. This eliminates the need for complicated operations such as returning to the site and going on-hook, which has the effect of improving operability.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing one embodiment of the present invention. 1...Handset, 2...Hook switch circuit,
3...Telephone circuit network, 4...Line closing circuit, 5...
Timer circuit, 6... Incoming call detection circuit, 7... Line. Agent: Susumu Uchihara, patent attorney

Claims (1)

[Claims] a line closing circuit that closes the line when the handset is off-hook, and a timer circuit that counts a preset fixed time after detecting on-hook and sends a signal to the line closing circuit to open the line after the fixed time. A telephone characterized by having.