JPS6220452A - Line terminating equipment - Google Patents

Abstract

PURPOSE:To speak directly with the subscriber of a telephone set in the other party by an interphone slave machine, by switching the telephone line, to which a telephone set and a channel are set, to the telephone set and the interphone slave machine manually. CONSTITUTION:When a call comes from a telephone line 7, the call is responded with a telephone set 8 because a changeover switch 6 is always connected to the telephone set 8. After a designated person concerned is called to an interphone slave machine 9 by the interphone slave machine 9 connected to an interphone master machine 2 and he responds, the changeover switch 6 is operated manually to switch the telephone line 7 from the telephone set 8 to the interphone slave machine 9. First, a pre-disconnection contact relay 4 is operated through a switching control circuit 5 to switch the interphone slave machine 9 to the connection to a pre-disconnection relay 3. Next, the relay 3 is operated to switch the telephone line 7 to the connection to the relay 4. Thus, the telephone set 8 is switched to the interphone slave machine 9 without disconnecting the call.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a line termination device used for telephones, and more specifically, the present invention relates to a line termination device used for telephones, and more specifically, a received call is manually transferred from a telephone to an intercom handset without using an exchange. The present invention relates to a line terminating device that can be switched by a telephone and that does not require manual switching of a telephone line that has been made and connected from a telephone set to an intercom handset.

(Prior Art) Generally, when a call is received, the person in question who is in a separate room in the house is called using an intercom without installing a switchboard.

(Problems to be Solved by the Invention) However, with this calling method, there is a problem in that the called person must move to the location of the telephone. Furthermore, even when a person on the side of the intercom handset wants to make a call, there is a similar problem in that he or she has to move to the location of the telephone.

The present invention solves the above problems and provides a line termination device that can switch the telephone line from the telephone to the intercom handset and communicate between the other party's telephone and the intercom handset without using a switch. That is.

(Means for Solving the Problems) In order to solve the above problems, the line termination device according to the present invention is capable of connecting an intercom handset and the other party's telephone using a contact-before-disconnection relay. This allows the telephone line to be manually switched to either the telephone or the intercom handset.

(Function) According to the present invention, when a calling telephone is received, the called person who is on the intercom handset side is called by the intercom, and when a response is obtained, the pre-disconnection contact type relay is manually operated. Since the telephone line can be switched from the telephone to the intercom handset, it is possible to talk from the position of the intercom handset.

Also, when a person on the intercom handset side wants to make a call, they can call the interphone base unit of this device, have the person make the call, and when the person they want to talk to answers the other party's phone, the phone line is disconnected. Direct calls can be made by switching from the telephone to the intercom handset.

(Example) An example of the present invention will be described with reference to the drawings. In the figure, ■ is a line termination device, 2 is an interphone base unit, 3 is a pre-disconnection contact type relay that switches and connects the telephone line to a telephone and an interphone base unit, and 4 is a switchable connection between an interphone slave unit and a telephone line and an interphone base unit. 5 is a switching control circuit,
Reference numeral 6 designates a changeover switch for switching and connecting the telephone set and the intercom handset, 7 represents a telephone line, and 8 represents a telephone set.

The operation of the line termination device 1 having such a configuration will be explained.

When a call comes in from the telephone line 7, the changeover switch 6 is always connected to the telephone 8, so the telephone 8 answers the call. Next, after calling the designated person to the interphone handset 9 connected to the interphone main unit 2 and answering the call, manually operate the changeover switch 6 to connect the telephone line 7 from the telephone 8. Switch to intercom handset 9. Via the switching control circuit 5, the pre-disconnection contact type relay 4 is activated, and the interphone handset 9, which has been connected to the interphone base unit 2, is switched to be connected to the pre-disconnection contact type relay 3. Next, the pre-disconnection contact type relay 3 operates, and the telephone line 7 connected to the telephone set 8 is switched to the connection with the pre-disconnection contact type relay 4 . In this manner, by the action of the pre-disconnection contact type relay 3, it is possible to switch from the telephone set 8 to the intercom handset 9 without disconnecting the call.

Also, if you want to make a call from intercom handset 9,
An interphone base unit 9 calls the interphone base unit 2 and requests connection to the other party's telephone. If the telephone line 7 is switched to either the telephone 8 or the intercom handset 9 by manually operating the changeover switch 6 when the other party appears, the interphone handset 9 can directly talk to the other party's telephone.

(Effects of the Invention) As explained above, according to the line termination device of the present invention,
The telephone line can be manually switched from the telephone to the intercom handset, and the intercom handset can be used to directly talk to the other party's telephone.

Also, call the interphone base unit from the interphone slave unit,
The telephone connected to the line from the telephone on the interphone base side is connected to the interphone handset by the method described above, and it becomes possible to talk directly from the interphone handset.

[Brief explanation of the drawing]

The figure is a configuration diagram showing the relationship between a line termination device according to the present invention, a telephone line, a telephone set, and an intercom handset. DESCRIPTION OF SYMBOLS 1... Line termination device, 2... Intercom base unit, 3゜4... Contact before disconnection type relay, 5... Switching control circuit,
6... Changeover switch, 7... Telephone line, 8... Telephone set, 9... Intercom handset.

Claims (1)

[Claims] A line termination device characterized by comprising a pre-disconnection contact type means for manually switching a telephone line on which a telephone line and a communication path have been set to either a telephone set or an intercom handset.