DE1278547B - Method and arrangement for direct dialing of connections from mobile subscribers to subscribers in telephone private branch exchanges - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

int.CI .:

H04m

H04q

German KL: 21 a3- 47/10

Number: 1278 547

File number: P 12 78 547.6-31 (St 25904)

Filing date: September 22, 1966

Opening day: September 26, 1968

In the public network of the Deutsche Bundespost there is also traffic with participants in vehicles possible. All conversations are conveyed via a constantly manned transfer point. Even in private networks z. B. Police will be the traffic between radio and wire participants over a constantly occupied space.

In the case of smaller networks, it is not always possible to occupy a transition point all the time, and it will a direct dialing procedure is sought. As a direct dialing procedure for mobile subscribers in the network are the so-called IMTS procedure from America and the procedures of the Swiss and Swedish Postal administrations known. However, these methods are different for smaller private radio networks for reasons of effort the end.

A use of direct-inward dialing transmissions as upstream organs before official transmissions in Private branch exchanges are ruled out for reasons of cost. In addition, the use on private branch exchanges is ao the construction stage III limited, while an extension from the radio network also in smaller private branch exchanges Construction stage II and possibly also construction stage I should be possible.

Another possible way is to use cross-connect transmissions. These divorce however, because they are tied to the make of the respective private branch exchange and always high Cause adaptation costs as well as interventions in the private branch exchange or a large number of wires between the private branch exchange and the radio gateway.

The invention is based on the object of a method for direct dialing connections from mobile subscribers to subscribers in telephony private branch exchanges via a gateway to create from the radio network to the wire network, in which the effort compared to the known methods is lower and there are no changes in the private branch exchange, regardless of the make and which operating voltage is required.

Furthermore, the selective call procedure in the direction of the mobile subscriber should remain untouched, which has been introduced on a broad basis and has proven itself.

This is achieved according to the invention in that the gateway in the direction of the wire network is preceded by a device in which the incoming and outgoing traffic is divided into a twin wire each, in which the dialing characters coming from the wire network are also converted into the known selective call and in the procedure and arrangement for the extension of
Connections from moving participants to
Subscribers in telephone exchange systems

Applicant:

Standard Elektrik Lorenz Aktiengesellschaft,
7000 Stuttgart-Zuffenhausen,
Hellmuth-Hirth-Str. 42

Named as inventor:
Konrad Bartels, 7536 Ispringen

which converts the criteria coming from the radio network into characters commonly used in private branch exchanges and that the wire pair for the traffic coming from the private branch exchange to the Office-side entrance of an exchange transmission and the twin wire for the traffic to the private branch exchange is applied to a subscriber circuit switched only for outgoing traffic.

The invention will now be explained in more detail using the exemplary embodiment shown in the drawing. It shows

F i g. 1 a block diagram of the private branch exchange with the base station and

Fig. 2 details of the in Fig. 1 below the Dotted line blocks of the base station shown.

Let us first consider a connection from an extension subscriber to a mobile subscriber. The dividing line between the private branch exchange and the base station is indicated by the dash-dotted line. If the subscriber picks up the handset on his telephone set FeAp, he is connected to an internal transmission IUe via his subscriber circuit TInSl and a call finder AS . By dialing a code that is different from that for the usual official traffic, he causes it to be connected to a special office transmission SA Ue via the special selector SW . The structure of this transfer of office does not differ from the usual transfers of office. The entrance on the office side is not connected to the office, but to a radio relay set FuReIS .

The mobile subscriber's code number selected by the subscriber is converted into the usual selective call in the radio relay set and applied to antenna A via the gateway UeIe.

809 618/105

If, on the other hand, a mobile subscriber wants to speak to a subscriber in the private branch exchange, he initiates a connection in the usual way. With this introduction, the criteria otherwise usual when lifting the handset are imitated in the radio relay set and the subscriber is now connected to an internal transmission IUe via the subscriber circuit TInS 2 and a call finder AS . The choice received from the mobile subscriber controls the line selector LW to the desired subscriber after implementation.

If the mobile subscriber is to be prevented from being connected to the public network via an exchange dialer AW and an exchange transmission AUe , the authorization of the subscriber circuit can be switched accordingly in a known manner.

Since the overreach elimination consists of different tones in the direction of the base station must remain, is seizing (start call) and disconnecting (closing call) practically through tone selection given. The choice, on the other hand, is free. Since it is within both criteria, it can be used anywhere be the same and not disturb others by overreach. A decadal tone sequence system appears optimal, as pulse counting methods are ruled out in the vehicle for reasons of safety and effort.

On the basis of FIG. 2 the processes in the radio relay set and in the transfer device should now be somewhat will be explained in more detail. To simplify the illustration, the connections are essential shown only single-core.

When the special office transmission SA Ue is assigned, the relay T responds and switches on the drop-out delayed relay TV with its contact ti . This connects with its contact tv the fork Ga with the twin wire from the special office transfer. The deactivation of the dial tone that takes place during an occupancy is not shown because it is known. The subscriber's pulse dialing is recorded with the relay T and the contact ti feeds this information into the dial converter WU , in which the pulse dialing is converted into the known selective call. When the selective call is sent, the relay W responds and for this time, with its contact w, connects the dial converter WU with the transmitter S.

In the case of a connection from a mobile subscriber, the start call via the audio frequency receiver TFE connected to the receiver E addresses the relay B , which creates a loop closure in the pair with its contact & 2 and thus issues an occupancy criterion to the subscriber circuit TInS 2. Contact & 1 interrupts a wire from the direction of the private branch exchange in order to block this traffic direction.

The incoming signals in the decadic tone sequence system are converted into dialing pulses in the tone frequency receiver TFE , which control relay J. Contact i then passes the impulses on to the private branch exchange as loop interruptions.

When the final signal is received, the relay B drops out again and the connection in the private branch exchange is triggered when the loop is opened by the contact b 2.

From the above it can be clearly seen that at the intersection between the private branch exchange and the base station, by the dash-dotted line in FIG. 1 is marked, only two pairs are connected will. The make of the private branch exchange and the operating voltage can also be arbitrary be. For the traffic to the private branch exchange, only loop criteria are formed in the radio relay set, without a voltage being switched on here. For the opposite direction, the end on the office side supplies the Office transfer the loop criteria and the voltage is applied in the radio relay set.

Even if the usual pulse selection was described in the exemplary embodiment, it goes without saying that that other electoral processes, e.g. B. touch dial, can be used. Also can instead of the decadal tone sequence system, a differently coded tone frequency system is also available when choosing be used, e.g. B. Multi-frequency code dialing.

Claims (3)

Patent claims: 1. A method for direct dialing of connections from mobile subscribers to subscribers in telephone private branch exchanges via a gateway from the radio to the wire network, characterized in that the gateway (UeIe) in the direction of the wire network is preceded by a device (FuReIS) in which the incoming and the outgoing traffic is divided on a pair of wires, in which the dialing characters coming from the wire network are also converted into the known selective call and in which the criteria coming from the radio network are converted into characters customary in private branch exchanges, and that the pair for the traffic coming from the private branch exchange to the office-side entrance of an exchange transmission (SAUe) and the twin wire for the traffic to the private branch exchange to a subscriber circuit (TInS 2) switched only for outgoing traffic. 2. The method according to claim 1, characterized in that selective start and end criteria be sent and that the transmission of the voting signals from the mobile subscriber by means of coded audio frequency signals (decadic tone sequence system, multi-frequency code dialing) . 3. Arrangement for carrying out the method according to claim 1, characterized in that a fork (Ga), in the transmission and reception path are combined, is connected in the idle state to the pair leading to the subscriber circuit that the receiver (E) has an evaluation circuit (TFE) is connected, which with its switching means (i, & 2) forwards the characters received on the radio path after conversion into characters customary in private branch exchanges and that a conversion device (WU) is available that converts the characters from the private branch exchange into for converts signs common to wireless traffic. 1 sheet of drawings 809 618/105 9.68 © Bundesdruckerei Berlin