WO2007036248A1 - System and method for carrying out a call-back service for mobile communication terminals using data connections - Google Patents

Abstract

The invention relates to a call-back service device and method, based on a call-back service switching station and one or more mobile communication terminals which are configured to enter into communication with each other in order to establish a voice connection between the caller and the subscriber to be called via the call-back service switching station, wherein the communication between mobile communication terminals and the call-back service switching station is carried out by means of a data connection while the communication between the mobile communication terminals is carried out by means of a wireless data connection, the mobile communication terminals being configured for this communication.

Description

 SYSTEM AND METHOD FOR IMPLEMENTING A RECALL SERVICE FOR MOBILE COMMUNICATION END USERS USING DATA CONNECTIONS

FIELD OF THE INVENTION

The present invention generally relates to the switching of a voice connection from a mobile communication terminal to any other communication terminal via or via a callback service switching system, as well as to a device of mobile communication terminals, e.g. in the form of a program which gives the calling mobile communication terminal the possibility of special contact to the callback service switching system.

BACKGROUND OF THE INVENTION

Historically, even today, telephone networks for national, market or business reasons are separated from each other by technology, organization and cost of use for the consumer. In the case of usage costs, this often means that the costs of voice calls between two national or international telephone network operators are not symmetrical: the telephone call charge between subscribers A and B is more expensive for A as a caller than for B as a caller or vice versa.

Therefore, a method soon established that enabled a subscriber A in a telephone network NA to establish a telephone connection to subscriber B in a telephone network NB at the lower fees of NB or a third telephone network NX: the callback method or callback method. This works in principle as follows: A caller calls over a special call number, which he receives from a callback provider, an agent of the callback provider and puts on after a call confirmation of the operator again. The operator immediately retrieves the caller and provides a low-cost trunk over which the caller then handles his call. The caller number of the person to be called is thereby entered by normal telephone dialing or by voice input. Billing takes place via the invoice of the callback provider.

So far, the callback procedure has paid off especially for international connections, eg from Germany to the US, because in the USA the telephone charges are lower compared to those in Germany. With the introduction of mobile networks and their diverse Fee tariffs, the callback V experienced experience but also nationally between the various mobile network operators and between mobile networks and fixed networks has become worthwhile.

The most important argument for using this method is the cost savings. The next important argument is the ease of use and the expense of using this method. In all call-back methods known today, in addition to the number or address (the IP telephony also allows the use of symbolic addresses as an alias for the number) of the caller, the number or address of a callback provider must be selected or otherwise specified.

SUMMARY OF THE INVENTION

The invention relates to a callback system (also referred to herein as a "callback device") and a callback system realized by a callback system consisting of data-compatible mobile communication terminals with an MEC module and an MECM callback service which can communicate with MEC modules.

The callback service switch is e.g. one or more, suitably cooperating, server computers that are suitably programmed into telecommunication networks and are suitably programmed for the described functionalities of the call-back service switching system. For the sake of simplicity, the server computer (s) will be referred to herein as the "callback service switch".

The communication between MEC modules and the MECM callback service switching takes place via a data connection, with which the contacting and communication is also fast and also cheap in comparison to usual voice connection charges. The MEC module becomes active on a going call and transparently provides the caller with establishing the voice connection to the caller via the MECM callback service according to method I or procedure II, if possible, and saving the caller against the cost of a voice call Telecommunications provider arises.

DEFINITIONS

Definition of the terms voice connection, voice-oriented voice connection, data-oriented voice connection and data connection, as understood in this document and be used.

VOICE CONNECT

A communication connection for voice is called in the following voice connection.

The voice connection is a so-called real-time service and can be constructed with both an analog and a digital technical method. Characteristic of voice data is that they occur in a continuous sequence and without a previously known end, a so-called stream. Characteristic of a voice connection is that over it voice data are transmitted continuously or quasi-continuously and are output at the destination by means of a receiver again continuously and at the same speed as before the transmission.

Continuous data transfer means that the data is transmitted in the same order as it is received over the connection. In general, the data are equidistant to each other. Examples include the analog telephone network, the ISDN network or the GSM network.

Quasi-continuous data transmission means that the data is not transmitted continuously and equidistantly, but so that the data receiver can reconstruct the original continuous signal. Quasi-continuous data transmission arises in data-oriented communication links, e.g. by grouping data into packets, by non-equidistant transmission of the data or data packets, or by using several communication paths for data transmission, so that even the arrival order of the data or data packets differs from the transmission order. The transmission is quasi-continuous if it is fast enough and secure enough that, despite these adversities, the receiver can generate a continuous data stream delayed to the original data stream and also output at the same speed. Example of this is Internet telephony via the Internet or WLAN.

In the following, when a distinction is made between continuous and quasi-continuous speech, the following terms are used: LANGUAGE-ORIENTED LANGUAGE CONNECTION

Voice connection with continuous data transmission.

DATA-ORIENTED LANGUAGE CONNECTION

Voice connection with quasi-continuous data transmission. DATA CONNECTION

A communication link is a so-called non-real-time discrete data service. It is called data connection in the following.

The data connection can be constructed using both an analog and digital technical method. Characteristic of discrete data is that it does not represent a continuous sequence of a signal, but rather information and instructions, and that the amount of discrete data is known in advance. Examples include the transfer of a file from computer A to computer B or the remote control of computer A by computer B.

There now follows an illustration of various embodiments of the invention. Some embodiments use a method I, others a method II. Both methods considerably increase the ease of use of a call-back system for mobile communication terminals and, if used expediently, permit connection cost savings. Method I is independent of method IL Method II is based on method I.

Method I, in addition to the possible connection cost savings, substantially increases the ease of use of a callback system for mobile communication terminals.

It requires the almost standard ability of modern mobile communication terminals to establish in parallel a data connection through which the Internet or other networks can be accessed. It also requires special functionality for mobile communication terminals, which can be implemented in hardware or software. This functionality is realized by the so-called mobile communication terminal callback module or MEC module in the following. And it requires a callback service switch, which can communicate with the MEC module, hereinafter referred to as MEC module-compatible callback service switching or MECM callback service switching for short.

The MEC module intercepts the number of the caller in the event of a call. On the basis of a preference list, the MEC module decides whether the connection is established as usual, e.g. for emergency numbers, special numbers or numbers of a user preference list, or whether the MEC module retains further control and controls connection establishment via the callback system.

If the MEC module decides to set up the connection via the callback system, it makes contact with the MECM callback service via a data connection and transmits at least its own and the number to be called. For data connections The contact and communication takes place very quickly. Due to the small amount of data transmitted, this contact is also generally less expensive than a voice connection to a callback switch.

The MECM Recall Service Agency uses a preference list to check the feasibility of the contract and confirm or reject it.

In the case of rejection, the MEC module relinquishes control to the standard connection control of the mobile communication terminal and the connection is established as usual. In the case of acknowledgment, the MECM callback service switch dials and connects both the caller and the caller over a voice connection. Method II, like method I, in addition to the possible connection cost savings, essentially increases the ease of use of a call-back system for mobile communication terminals, but for the special case that the call charges from caller to call-back service switching are cheaper than the other way round.

Method II supplements the classic callback method, in which the callback service calls back the caller and provides him with an outside line, a variant that takes advantage of a so-called telephone flatrate. The telephone flatrate offers unlimited connections without time accounting to defined telephone networks at a fixed price. For a sensible use of Method II, the cost of connecting to the Call Center does not really need to be free. It is enough if the charges for the connection from the caller to the callback service are lower than the other way round. If a callback service can be called by means of a flatrate, but not the person to be called, then the flatrate connection should be used due to the cost savings. The variant consists of calling the call-back service provider, but notifying her in advance of this call as well as the number to be called. If the pre-notification process is fast enough, the call-back service can dial the number to call while being dialed by the caller himself. When the caller gets in touch with the callback service, they only need to connect that call to the one they want to call. For the caller, a cost advantage arises when the call from the call center to the caller is cheaper than his, and a time advantage over the classic callback policy. Due to the method of call forwarding, this is referred to below as a call-through method.

To obtain the time advantage, variant II, like variant I, uses the virtually standard possibility of modern mobile communication terminals for the parallel establishment of a data connection via which the Internet or other networks are accessed can. It also requires an MEC module described in Variant I and an MECM callback service switch for the mobile communication terminal.

The MEC module intercepts the number of the caller in the event of a call. On the basis of a preference list, the MEC module decides whether the connection is to be established by means of an MECM callback service using the callthrough method.

If the MEC module for the callthrough method decides via the callback system, it makes contact with the MECM callback service via a data connection and transmits at least its own number and the number to be called. The advantages of a data connection are listed in Method I. The MECM Recall Service Agency uses a preference list to check the feasibility of the order and confirm or reject it.

In the case of rejection, the MEC module checks the applicability of the callback method according to method I and continues as described in method I. In the case of confirmation, the MECM callback service provider dials the caller via a voice connection and the caller's mobile communication terminal, under the control of the MEC module, dials the callback service switch. The MECM callback service awaits the call from the caller and immediately switches it to the outside line of the caller.

The processes of both methods are transparent to the caller. The cost of the phone call is the same for him as without the use of these methods.

DESCRIPTION OF THE DRAWINGS

Embodiments of the invention will now be described by way of example and with reference to the accompanying drawings, in which:

FIG. 1a shows a schematic representation of the communication partners and the communication paths in a callback service system with a voice-oriented voice connection (fixed network, GSM) to the subscriber to be called; FIG.

FIG. 1b shows a schematic representation of the communication partners and of the communication paths in a callback service system with a data-oriented voice connection (Internet telephony) to the subscriber to be called; FIG.

1c a schematic representation of the communication partners as well as the communication paths in a callback service system with a voice-oriented voice connection via a switch delegated by the MECM call-back service switch to be called Participant represents;

Fig. 2a illustrates the communication between mobile communication terminal with MEC module and MECM callback service switching when using the callback method on the basis of a temporal function and communication sequence; 2b illustrates the communication between the mobile communication terminal with MEC module and MECM callback service switching when using the callthrough method on the basis of a temporal function and communication sequence;

3 shows a schematic representation of the integration of the MEC module into a mobile communication terminal.

Figure Ia shows schematically the communication partner caller, caller with voice-oriented voice connection to the provider and MECM call-back service switching and their associated providers (telephone service providers) A, B and C with their telephone networks and a data network such. the Internet. Provider B and C can be identical. Likewise Provider A and C, but not sensibly. The MECM callback service can also have multiple providers or even be part of a provider.

The terminal of the caller, here subscriber A, is a mobile communication terminal with an MEC module, the terminal of the caller may be a landline or mobile terminal, or else a terminal for data-oriented voice connections, colloquially called an Internet telephone Communication paths for such a terminal are shown in FIG.

Upon call triggering, the caller terminal MEC module initiates data communication with the MECM callback service (dotted path). It dials both callers and callers via voice connections (dashed paths) and connects the two voice connections.

FIG. 1b schematically shows the communication partners caller, caller with data-oriented voice connection to the provider and MECM call-back service switch and their associated providers A, B and C with their telephone networks and a data network such as e.g. the Internet. The data connection and the data-oriented voice connection can also be routed via different data networks. As in FIG. 1 a, the MECM call-back service switching can also have several providers or can itself be part of a provider.

The communication partners and routes are analogous to FIG. 1a with the difference that in that the MECM call-back service switches the voice connection to the caller via a data network and a data-oriented voice connection.

Figure Ic schematically shows the communication partner caller, caller with voice-oriented voice connection to the provider (but applies analogously to Ib for a data-oriented voice connection) and MECM callback service and their associated providers A, B and C with their telephone networks and a data network such. the Internet. As in FIG. 1a, the MECM call-back service switching can also have several providers or can itself be part of a provider. The communication partners and paths are analogous to Figure Ia with the difference that the MECM callback service itself does not establish a voice connection to the caller, but via a data connection to a third provider, which also as shown in Ic the provider of the caller, delegates this task , The delegated exchange then carries out the connection via the callback method or else via the callthrough method if it masters this method.

Figure 2a illustrates the essential operations in the mobile communication terminal with MEC module and in the MECM callback service switch and the communication between the two when using the callback method. In the case of a call initiation (Tl) by the user, the MEC module first checks whether there are any opposite preferences for establishing a connection via an MECM call-back service exchange for the number to be called (T2).

If this is the case, the MEC module contacts the MECM callback service via a data connection (T3) and informs it of at least all the necessary data (T4).

The MECM callback service switch checks whether it can accept the service order (T5) and communicates the result to the MEC module via the same data connection (T6). The communication between the MEC module and the MECM callback service exchange is thus ended. In the case of a rejection of the service order (T6), the MEC module transfers control to the standard call control, whereupon a call is established in the usual way. The MECM callback service arbitrates the processing of this service request (T6).

In the case of a confirmation of the service order (T6), the MEC module waits for the call the MECM callback service, suppresses call signaling until the connection and terminates control over this connection (T7) when the call is established. The MECM callback service provider dials both callers and callers via voice connections (T6) and switches both connections together. The processing of the service order can be terminated here or for reasons of connection monitoring or billing only at the end of the connection (T7).

FIG. 2b illustrates the essential processes in the mobile communication terminal with MEC module and in the MECM call-back service switching and the communication between the two when using the call-through method.

In the case of a call initiation (Tl) by the user, the MEC module first checks whether there are any opposite preferences for establishing a connection via an MECM call-back service exchange for the number to be called (T2).

If this is the case, the MEC module contacts the MECM callback service via a data connection (T3) and informs it at least about all the necessary data (T4).

The MECM callback service switch checks whether it can accept the service order (T5) and communicates the result to the MEC module via the same data connection (T6).

In the event of a rejection of the service order (T6), the MEC module may, on the basis of preferences, check whether there are no preferences for establishing an MECM call-back service via the callback method for the number to be called and if this is not the case, continue the process at T2 in Figure 2a, or pass control to the standard call control, followed by call setup in the usual manner. In the latter case, the MECM call-back service switch terminates the processing of this service request (T6) and the communication between the MEC module and the MECM call-back service switch is thus ended.

In the case of a confirmation of the service order (T6), the MEC module controls the call at the MECM call-back service exchange and terminates control of this connection (T7) when the connection is established. The MECM callback service immediately dials the caller via voice calls and simultaneously awaits the caller's call (T6). When the call of the caller is received, it switches both connections together. The processing of the service order can be terminated here or for reasons of connection monitoring or billing only at the end of the connection (T7). FIG. 3 schematically shows the integration of the MEC module into a mobile communication terminal. It must be looped in between the terminal control and the connection control, on the assumption that the controller, in the case of a choice with the instruction for setting up a connection or shortly for a call initiation, transfers the necessary data to a connection controller and then carries out all necessary measures for establishing a connection. The MEC module must intercept the data to the call control and initially hold it back. If, due to settings or user-specific preferences, the use of the MECM callback service is allowed for the telephone number to be called, the MEC module will control the further action at least until the call is established. The further connection control can then be transferred again to the connection control.

Claims

A call-back service, comprising a call-back service and one or more mobile-communication terminals, configured to communicate with each other with the aim of establishing a voice connection between the caller and the caller via the call-return service, wherein the communication between the mobile-communication terminals and Callback service switching takes place by means of a data connection, the communication takes place on the part of the mobile communication terminals by means of a wireless data connection and the mobile communication terminals are set up for this communication. 2. Callback service according to claim 1, wherein the callback service from the Mobile communication terminal of the caller via a data connection gets his own and the phone number to be called notified. 3. The call-back service device according to claim 1, wherein the call-back service switch is from the caller's mobile communication terminal via a data connection via the Information is given by claim 2 information regarding fees or costs, with which the caller specifies a cost framework as a service contract criterion. 4. callback service device according to claim 1 or 2, wherein the callback service is notified by the mobile communication terminal of the caller via a data connection on the information of claim 2 beyond further information with which the caller specifies a service contract criterion. 5. callback service device according to one of claims 1 to 4, according to which the callback service switching after receiving the data carries out an acceptance check and as a result of the callback service mediation confirms this callback service order against the mobile communication terminal or rejects. 6. Callback service according to one of claims 1 to 5, according to which the callback service after receiving the data, depending on or independent of the outcome of the acceptance test, on a rejection or confirmation of the service contract information beyond the same or other data connection tells the contracting mobile communication terminal suitable for enabling the mobile communication terminal to establish a more cost effective voice connection even without the intermediary of the callback service switch. 7. The callback service device according to claim 1, wherein the voice connection to the caller includes all possible types of voice connections such as landline connections, mobile radio connections or packet-oriented or other data-oriented voice connections via the Internet or other networks. 8. Call-back service device according to one of claims 1 to 6, wherein the call-return service can delegate a confirmed switching order on the basis of an advantage criterion or a preference this also to other exchanges or to execute the service order suitable facilities. A callback service as claimed in any one of claims 1 to 8, wherein the callback service, when accepting the call service order, dials both the caller and the caller via a voice connection and interconnects the calls (callback V). 10. The callback service of any one of claims 1 to 8, wherein the callback service, when accepting the call service request, awaits the call from the caller and simultaneously dials the caller via a voice connection and interconnects the calls as soon as the caller has voice connection (callthrough service). Method). 11. The callback service device according to claim 1, wherein the mobile communication Terminal devices by means of a software program or a hardware control for communication with the callback service exchange after a user input for the purpose of setting up a voice connection automatically or depending on user preferences decides whether the connection recording in the usual way within the mobile communication nikations terminal possible ways, ie without further action by the program to communicate with the callback service, or whether the connection should be made using the callback service and to make contact via a wireless data connection to the callback service. 12. Callback service device according to claim 11, wherein in the decision to establish connection with the help of the callback service switching, the so-called callback method according to claim 9 can be selected. 13. Callback service according to claim 11, wherein in the decision to establish connection with the help of the callback service switching, the so-called call-through method according to claim 10 can be selected. 14. The callback service device according to claim 1, wherein the program is capable of communicating with the callback service even after a call Refusal of the mediation order on the part of the call-back service switching to return the control for connection to the controller of the mobile communication terminal, so that the connection is made in the usual way in the context of the mobile communication terminal possible ways. 15. Callback service device according to any one of claims 1, 11 to 13, wherein the program for communicating with the callback service switching is able to create after a rejection of a switching order after the C allthrough- method a further switching job according to the callback method and vice versa. 16. Callback service device according to claim 1 or 11, wherein the program for communication with the callback service switching is also able to receive order confirmation or confirmation of outgoing information of the callback service switching according to claim 6, to evaluate and to respond in a suitable manner. 17 callback service device according to claim 1 or 11, wherein the mobile communication ons terminals are capable of data communication using GSM-based technologies of the 2.5G mobile standard to perform (GPRS, HSCSD, EDGE). 18. Callback service device according to spoke 1 or 11, wherein the mobile communication terminals are able to perform data communication using technologies of the 3G mobile radio standard (UMTS). 19. Callback service device according to spoke 1 or 11, wherein the mobile communication terminals are able to carry out data communication by means of the Bluetooth technology. 20. The callback service according to claim 1 or 1 1, wherein the mobile communication terminals are capable of carrying out data communication by means of a wireless LAN technology. 21. The callback service device according to claim 1 or 11, wherein the mobile communication terminals are capable of performing data communication by means of any technology whose characteristic is wireless transmission and whose data transmission protocol is data-oriented, such as transmitting a number or number or character. binary coded, and not language oriented, e.g. via the multi-frequency dialing method. 22. The returnee service exchange according to claim 1, designed for communication with mobile communication terminals according to one of claims 11 to 21 by means of a software program. 23. The returnee service exchange according to one of claims 1 to 10, configured for communication with mobile communication terminals according to one of claims 11 to 21 by means of circuit-implemented or logic-implemented hardware control. 24. Computer program stored on a data carrier or in the present case in the form of a signal sequence which is suitable for transmission via a network or a radio link, wherein the computer program during the expiration on a callback service or callback service capable or suitable hardware according to one of claims 1 to 10 imparts the functionality of data communication with a mobile communication terminal according to one of claims 11 to 21. 25. Mobile communication terminal according to one of claims 11 to 21, formed for communication with a call-back service provider according to one of claims 1 to 10 by means of a software program. 26. Mobile communication terminal according to one of claims 11 to 21, designed for communication with a call-back service switching system according to claims 1 to 10 by means of circuit-implemented or logic-implemented hardware control. 27. Computer program, stored on a data carrier or in the present case in the form of a signal sequence which is suitable for transmission via a network or a radio link, in particular for transmission in a mobile communication terminal is suitable, which in the expiration on a mobile communication terminal that the Functionality of wireless data communication according to one of claims 11 to 21 with a call-back service switching according to one of claims 1 to 10 confers. 28. A callback service method based on a callback service switch and one or more mobile communication terminals configured to communicate with each other with the aim of establishing a voice connection between the caller and the caller via the callback service switch, the communication between mobile communication terminals and call-back service switching takes place by means of a data connection, the communication on the part of the mobile-communication terminals takes place by means of a wireless data connection and the mobile-communication terminals are set up for this communication. 29. The callback service method according to claim 28, wherein the callback service exchange is notified by the mobile communication terminal of the caller via a data connection of its own and the telephone number to be called. 30. The callback service method according to claim 28, wherein the callback service is notified by the caller's mobile communication terminal via a data connection in addition to the information of claim 29 with regard to charges or costs with which the caller as a service contract criterion receives a cost framework specified. 31. The callback service method as claimed in claim 28, wherein the callback service provider receives information from the mobile communication terminal of the caller via a data connection in addition to the information provided in claim 29, with which the caller specifies a service order criterion. 32. The callback service method according to claim 28, wherein after the data is received, the callback service switch performs an acceptance check and, as a result, the callback service switch confirms or rejects this callback service request to the mobile communication terminal. 33. The callback service method according to claim 28, wherein after the receipt of the data, the callback service provider notifies the ordering mobile communication terminal about the same or another data connection, depending on or independent of the outcome of the acceptance check, via a rejection or confirmation of the service order suitable for enabling the mobile communication terminal to establish a more cost effective voice connection even without the intermediary of the callback service switch. The callback service method of any one of claims 28 to 33, wherein the voice call to the caller includes all possible types of voice connections, such as landline, cellular, or packet-oriented or other data-oriented voice connections over the Internet or other networks. 35. The callback service method according to any one of claims 28 to 33, wherein the callback service switch can delegate a confirmed call order based on a benefit criterion or a preference to the latter also to other exchanges or to the execution of the service order suitable facilities. 36. The callback service method according to any of claims 28 to 35, wherein the callback service switch, when accepting the switch service order, dials both the caller and the caller via a voice connection and interconnects the calls (callback V). 37. A callback service method according to any one of claims 28 to 36, wherein the callback service switch, when accepting the switch service order, awaits the call from the caller and simultaneously dials the caller via a voice connection and interconnects the calls as soon as the caller has voice connection (callthrough service). Method). 38. The callback service method according to claim 28, wherein the mobile communication terminal device automatically or based on user preferences decide whether the connection recording in the usual way by means of a software program or a hardware control for communication with the call-back service after a user input number in the context of the mobile communication terminal possible ways, ie without further action by the program for communication with the callback service, or whether the connection should take place using the callback service and to make a contact via a wireless data connection to the callback service. 39. Callback service method according to claim 38, wherein in the decision to establish connection with the help of the callback service switching, the so-called callback method according to claim 36 can be selected. 40. The callback service method according to claim 38, wherein the so-called callthrough method according to claim 37 can be selected in the decision to establish connection with the aid of the callback service switch. 41. The callback service method according to any one of claims 28, 38 to 40, wherein the program for communicating with the callback service switch is capable of giving back control of the call connection to the controller of the mobile communication terminal even after a rejection of the call order by the callback service switch , so that the connection is made in the usual way in the context of the mobile communication terminal possible ways. 42. The callback service method according to any one of claims 28, 38 to 40, wherein the program for communicating with the callback service switch is capable of responding after a callback. Extension of a mediation order after the call-through procedure to create a further mediation order according to the callback method and vice versa. 43. The callback service method according to claim 28 or 38, wherein the program for communication with the callback service switch is also able to receive, evaluate and respond in an appropriate manner information about the callback service switch according to claim 6 that goes beyond order rejection or confirmation. 44. The callback service method according to claim 28 or 38, wherein the mobile communication terminals are capable of carrying out data communication by means of GSM based technologies of the 2.5G mobile radio standard (GPRS, HSCSD, EDGE). 45. The callback service method according to claim 28 or 38, wherein the mobile communication terminals are capable of carrying out data communication by means of technologies of the 3G mobile radio standard (UMTS). 46. The callback service method according to claim 28 or 38, wherein the mobile communication terminals are capable of executing data communication by means of the Bluetooth technology. 47. The callback service method according to claim 28 or 38, wherein the mobile communication terminals are capable of performing data communication by means of wireless LAN technology. 48. The callback service method according to claim 28 or 38, wherein the mobile communication terminals are capable of performing data communication by any technology whose characteristic is wireless transmission and whose data transmission protocol is data-oriented, for example, transmitting a number or number or character. binary coded, and not language oriented, e.g. via the multi-frequency dialing method.