DE4024708A1 - Telephone subscriber's appts. connector without exchange line - uses interface coupled to transmission-reception stage of radio telephone for linkage - Google Patents

Abstract

The telephone connector replaces the exchange line to allow access to the public telephone network when no exchange line is available provided that is within the reception range of a radio telephone netowrk. An exchange line interface is coupled to the transmission/reception stage of the radio telephone. The interface allows condition and control information to be handled as well as the speech signals, employing a multi-frequency transmission mode. Dialling pulses are received by a loop current evaluator (8) or the send/receive unit (8) of the control (10). Only when the complete dialled number is registered in it forwarded to the send/receive section (4) of the radio telephone. USE - Telephone subscribers appts., PBX or facsimile appts..

Description

The invention relates to an arrangement using of a radio telephone the participation of wire-found telephone devices without the presence of an outside line on enables public telephone traffic.

Method and circuit arrangement for direct dialing for the Establishing connections between subscriber stations wired telephone network and subscriber stations one Radiotelephone networks are widely known. (DE-OS 25 23 162, DE-AS 26 34 080, DE-PS 26 05 253, DE-PS 26 59 615, DE-AS 27 27 808)

Also message transmission systems with fixed transmitting / receiving stations and with movable transmitter / receiver stations, the radio messages with the fixed stations can exchange are known. (DE-OS 31 18 018, DE-PS 36 39 956)

Transfer devices between wireless are also known and wired communication routes using Microcomputer. (DE-OS 27 37 529)

Solutions are not known in which a wired Telephone setup without an external line on public telephone traffic can participate.

The invention is therefore based on the object Arrangement to create the wired telephone sets (e.g. private branch exchanges, fax machines) access to a public telephone network even if no telephone line is available, but the Subscriber connection in the reception area of a radio telephone network located.

According to the invention this object is achieved in that the Transceiver part of a radio telephone (with dialing option into the public telephone network, including car phones or mobile devices) is connected to an interface that the electrical interface of a telephone exchange line  realized. According to the invention for the coupling to the Radio telephone, the interface between the transmitting / receiving section and the user interface used. So that is with a radio telephone remote user interface a simple exchange with the Interface possible.

The operation of the radio telephone points towards a wired one Telephone features some special features, which the operator has to take into account or via which he must be informed during operation, e.g. B. Call number transmission in one block, time limit or queuing.

The invention is therefore also the Task based on creating a way to do this Map the user interface to the telephone device or transferred to.

This object is achieved in that in addition to Voice signals an exchange of information for display and Control is organized through the interface, as well as the incoming and outgoing information with the Special features of the radio network are coordinated. The one required type of signal transmission to the transceiver is by using the above. Interfaces known. The signal transmission between the interface and telephone device can, provided the telephone device has via a corresponding signal transceiver, via the a / b line or via a separate data line respectively. Suitable signals are e.g. B. from the interface standard audible and ringing tones and the Multi-frequency method.

If the telephone device is an automatic device, e.g. B. a fax machine or an answering machine, it is guaranteed that this is the outgoing dialing signals for a phone number can be sent completely. There too no operator about the current status of the radio telephone connection must be informed in this case on the additional data transmission can be dispensed with.  

The invention is explained in more detail using an exemplary embodiment. In the accompanying drawing shows

Fig. 1 shows the block diagram of the telephone exchange line replica.

To implement the telephone exchange line simulation ( 2 ), the interface ( 3 ) is connected to the transmitting / receiving part ( 4 ) of a radio telephone instead of its user interface. Connected to this arrangement ( 1 ), the wired telephone device ( 1 ) can participate in public telephone traffic.

The heart of the interface ( 3 ) is the controller ( 10 ). To evaluate the current operating status, it is in constant data exchange with the transceiver ( 4 ).

The function of this arrangement is as follows for the three Main operating modes: incoming call, dialing, conversation clarifies.

There are 3 possible equipment options for the telephone setup considered:

Var. 1: Standard interface, only a / b line without additional Data transmission / reception device

Var. 2: Only a / b equipment but with additional data / transmission / reception equipment e.g. B. Multiple frequency method (dotted representation)

Var. 3: like Var. 1 with additional separate data transmission device via the c / d line (dashed line Presentation)  

Incoming call

A radio incoming call is evaluated by the transmitting / receiving part ( 4 ) and forwarded to the controller ( 10 ). If a free radio speech channel is also available at this time, the controller ( 10 ) then switches on the ring tone generator ( 5 ), which sends standard call signals to the telephone device ( 1 ). If this is not the case (the caller is in a queue), the controller ( 10 ) reacts differently for the three variants:

Var. 1: Only when a radio speech channel is available the ringer generator is switched on.

Var. 2: The ring tone generator is switched on immediately and the queue operating state is signaled to the telephone device ( 1 ) via a data transmission device ( 8 ).

Var. 3: Like Var. 2 but signaling via data transmission device ( 14 )

If the hook switch in the telephone device ( 1 ) is actuated, the circuit closes to the power source ( 9 ). The grinding current evaluator ( 8 ) signals this state to the controller ( 10 ), which causes it to switch off the ring tone generator ( 5 ). If no free radio communication channel is available yet, this status (only necessary for Var. 2 and Var. 3) can be signaled with a special character by the controller ( 10 ) via the audio tone generator ( 6 ) of the telephone device ( 1 ).

Dialing

If the loop circuit is closed in the telephone device ( 1 ) by actuating the hook switch via the a / b line with the power source ( 9 ), the loop current evaluation ( 8 ) signals the control ( 10 ). It then ensures that the audible signal ( 6 ) sends the official signal to the a / b line.

The dialing information can now be transmitted from the telephone device via the a / b line by loop current pulses or multi-frequency signals. They are fed to the control ( 10 ) via the loop current evaluator ( 7 ) or the transmitting / receiving device ( 8 ). Only when the complete number has been recorded by the controller ( 10 ) is it forwarded to the transmitting / receiving part ( 4 ) of the radio telephone (system-related). However, this presupposes the end of the dialing process. It is not available in the wired ZBW telephone facilities (immediate truth of every single digit) and must be generated additionally. This can be done as follows:

Var. 1: The dialing information transmission of the individual digits must be carried out by the telephone device ( 1 ) for the complete call number in one block, ie the telephone device ( 1 ) must be equipped with automatic dialing.

In this case, the controller can end the Detect number dialing independently.

Var. 2: If the procedure according to Var. 1 is not applicable, the dialing information transmission of the individual digits can take place at any time interval if the end of the dialing by additional information, z. B. using the multi-frequency method. It is recognized by the transceiver ( 8 ) and signaled to the controller ( 10 ). The triggering of this additional information in the telephone device z. B. with the help of a special key that is to be pressed by the operator after entering the number.

Var. 3: Like Var. 2, with the difference that the dialing end marking takes place via the c / d line and is recognized by the transmitting / receiving device ( 14 ).

After the transmitting / receiving part ( 4 ) of the radio telephone has sent the number, it receives radio information about the establishment of the call, e.g. B. Participants - busy, - is called, - ready to talk but no radio channel available, etc. These messages are forwarded to the controller ( 10 ). Controlled from there, using the Hörtongenerators (6) or the transmitting-receiving device (8 or 14) the way of the further transmission of information for the telephone device (1) the conditions of the Var is. 1 . . . Var. 3 adjusted.

Interviewing

If both partners are ready to speak after a dialing process or after an incoming call and there is a free radio speech channel available, the control ( 10 ) activates the adaptation amplifiers ( 12, 13 ). The incoming and outgoing speech paths at the transmitting / receiving section ( 4 ) are switched back steamed to the a / b line behind the matching amplifiers ( 12, 13 ) by means of the fork ( 11 ). The connection of the telephone device ( 1 ) to the transmitting / receiving part of the radio telephone is thus established.

List of the reference numerals used

1 telephone facility
2 telephone line replication
3 interface
4 Transceiver part of a radio telephone
5 ring tone generator
6 tone generator
7 loop current evaluators
8 transmitting / receiving device
9 power source
10 control
11 Return damping
12 matching amplifiers
13 matching amplifier
14 transmitting / receiving device

Claims (2)

1. Arrangement for replicating a telephone exchange line, characterized in that the transmitting / receiving part of a known radio telephone arrangement suitable for telephone dialing is separated from its user interface and is instead combined with an interface which emulates the electrical properties of a ZBW telephone exchange line that an external connection can be implemented for the known arrangements of wired terminals connected to it via the radio telephone. 2. Arrangement for replicating a telephone exchange line Claim 1, characterized in that the interface in addition to the speech signals, the status and Control information used to emulate the user interface the radio telephone arrangement are necessary between Transceiver and wired terminal implements, laterally adapts to the special features of the radio network and over the voice signal line, e.g. B. with the help of Multi-frequency process, or a separate data interface transmits.