DE3331947A1 - Device for transmitting and receiving telecommunication signals - Google Patents

Abstract

An apparatus (1) is disclosed in which a telephone (5) and a modem (6) for videotex transmission are combined in a common housing. Components which are required both for the telephone (5) and for the modem (6) are only present once. They are assigned, by means of a change-over switch (7), to the device to be respectively operated. <IMAGE>

Description

Device for sending and receiving communications technology

niche signals The invention relates to a device for Sending and receiving of telecommunications signals at a participant at the end of a telephone line and at least one telephone as well as at least includes a modem for teletext.

A telephone becomes independent of its individual configuration installed in the building of a subscriber in which a telecommunication line ends. The connection of the telephone with the telecommunication line takes place via a connecting cord and a junction box. The connection can be fixed or pluggable. in the or the following "components" are attached to the telephone set: a dialing device, which can be designed as a dial or keyboard, a bell, one for the Dialing process required break contact for the phone number transfer (nsi contact), a component or a circuit for different evaluation of equal and AC components (for example a hybrid circuit) and - especially with modern telephones - an electronic, control unit, in which it is usually a microprocessor. The phone is operated by removing or replacing a phone, which closes a hook switch or is opened. Using the hook switch, the phone is connected to the so-called Loop current placed or separated from the same.

The modem for teletext transmission is with the same participant also attached to the end of the communication line.

The components of the modem are housed in a housing that is next to the junction box is arranged. From the modem connection lines go to the junction box and to a terminal which is arranged in a television set. To activate The modem has a dialing device that also has an NSI contact is working.

As with the telephone, there are also other components in the modem a circuit arrangement for the different evaluation of DC and AC components as well as an electronic control unit available. In addition, the modem has components that can be used to verify that the phone line is already through the phone is occupied. Simultaneous operation is in accordance with existing regulations not permitted by telephone or modem. It will therefore be in today's technology two separate devices connected to one and the same telecommunication line, which cannot be operated at the same time. The overall effort is therefore high.

The invention is based on the object of specifying a device with which the effort for the operation of a telephone and a modem is reduced can be.

This task is described in a device of a P gs Type solved according to the invention - that all components of the telephone and modem including the associated circuitry arranged in a common device - that the components that are required for the telephone and model as the same components are only present once and - that those which are only present once, common Components if necessary by means of a switch either the telephone or the Modem can be assigned.

Only a single device is required for the telephone and modem, so that the effort for the installation can be reduced. But also the effort expensive components can be reduced because the same components are only available once and used alternatively for either the telephone or the modem. It is therefore not just the components of the telephone and modem with their circuit arrangements combined in one device, but the components are used twice that are required at both facilities.

A set of such components can therefore be compared to previous embodiments can be saved.

Since the current regulations stipulate that telephone and modem may not be used at the same time, they become the common components assigned to the desired facility by switching. For this switchover the hook switch of the telephone is particularly suitable. When the same closed the phone can be operated while the modem is in the other position is connected to the communication line.

An exemplary embodiment of the subject matter of the invention is shown in the drawing shown, which shows the invention schematically as a block diagram.

1 with a device is referred to, the housing of which is dash-dotted in the drawing is indicated In the device 1 there are all components with associated circuits for operating a telephone 2 and a television set with a device 3 for On-Screen Text (BTX). The device 1 is connected to a telecommunications line that is indicated in the drawing with a and b. In the actual embodiment device 1 and the housing of telephone 2 are identical.

The phone 2 was only included for the sake of clarity of explanation and because of the handset 8 of the phone shown separately in the drawing.

The components are in a larger block 4 within the device 1 arranged with associated circuits for operating telephone 2 and BTX device 3 are required together. In box 5 there are only those additional for the phone 2 required components housed, while in box 6 the corresponding components for a modem are located, which are necessary for the operation of the BTX device 3 is required. In the box 4 are thus, for example, as common components for telephone 2 and BTX device 3 a breaker contact to interrupt the Loop current (nsi) and a circuit arrangement for different evaluation accommodated by direct and alternating current components (fork). Furthermore you can in the box 4 a power supply and an electronic control unit are arranged which is preferably a microprocessor.

So that the common components are either the phone 2 or the BTX device 3 can be assigned, a switch 7 is available in the device 1, which the Loop current interrupted in the rest position. He can use the two positions "t" and take "m". For example, if you want to make a phone call, the handset will be used 8 of the telephone 2 is lifted, which closes the hook switch of the telephone will. At the same time, the switch 7 is set to the "t" position. All for operation The components and circuits required for the telephone are then connected to the loop current. if the device 1 is occupied by the telephone 2 in this way, the BTX device can 3 can no longer be used.

After finishing the phone call, the switch 7 goes into his position shown in the drawing.

If on the other hand the BTX device 3 is switched on via the modem is to be, then a corresponding key on a keyboard 9 is pressed. If the telephone 2 is not connected, then the switch 7 is activated by pressing this key brought into position "m" by means of a relay 10 and the BTX device 3 is functioning. After the BTX process has ended, the switch 7 comes back in its position shown in the drawing.

In a preferred embodiment it is to simplify the Switching possible, instead of a separate switch 7 the hook switch of the phone 2 to use directly. That would mean that in the rest position the current loop is constantly closed for the BTX device 3, so that when operating the same no additional switching is required. Only when operating the phone a changeover of the circuit is required, which is in the simplified embodiment Simply by removing the handset and then closing the Hook switch can be done.

Claims (2)

Claims 9 device for sending and receiving communications Signals that is applied to a subscriber at the end of a telephone line and thereby comprises at least one telephone and at least one modem for teletext - that all components of the telephone (2) and modem (6) including the associated circuit arrangements are arranged in a common device (1) are, - that the components used in the telephone (2) and modem (6) are the same components are needed, are only available once and - that the only available once, Common components, if required, by means of a switch (7) either to the telephone (2) or the modem (6). 2. Apparatus according to claim 1, characterized in that as a changeover switch (7) the hook switch of the telephone (2) is inserted.