CN100442808C - A method for realizing voice-on-demand service - Google Patents

Abstract

The invention discloses a voice-on-demand service realization method, which is used to provide users with a voice-on-demand value-added service in combination with an existing communication network, which includes: step 1, performing a synchronous operation on the program data of each service node in the value-added service realization system ; Step 2, the sending user accesses the service node in the value-added service implementation system to order the program, and transmits the program code and the receiving user number; Step 3, the service realization notification system notifies the receiving user to listen to the program on demand; Step 4, the receiving user accesses the program nearby The service nodes in the value-added service realization system receive on-demand programs. The implementation method of the voice-on-demand service of the present invention sets service nodes in various places in the network, and the user does not need to transmit all the data when using the service, but only needs to transmit the code name of the program, which effectively saves resources and brings great convenience to the user .

Description

A method for realizing voice-on-demand service

technical field

The invention relates to a mobile communication system, in particular to a mobile communication value-added service system.

Background technique

At present, in the voice program on-demand and delivery service on the telecommunication network, the user mainly selects a program through the voice value-added service system or website, and then the voice value-added service system calls the called user and plays the program.

From the perspective of the network, the service system is generally set up locally, and the service provision and implementation are mainly local. When users use the service, they listen to or order programs by voice or website, and the program transmission is through the service system. The voice service systems in various places are independent of each other, the programs are different, and the business models are also very different. In the fixed telephone network, there has not been a particularly perfect solution to the problem of networking the voice value-added service system. For the mobile phone network, the situation is different. In order to realize For the purpose of service sharing across the country, the business system is usually centrally set up in a certain place, and the access number is set up on the network in other regions, and the route points to the system. The programs sent are all through long distance.

The current business usage mode and resource occupation mode bring a lot of trouble to users and severely limit the use of users and the development of services. In terms of resource occupation, the limitations are even greater, and users from other places use long-distance lines, which is inconvenient to use and high in cost.

Contents of the invention

In order to solve the above problems, the object of the present invention is to provide a voice-on-demand service implementation method, which effectively saves resources, is convenient to use, and has low cost.

In order to achieve the above object, the present invention provides a method for implementing voice-on-demand services, which is used to provide users with voice-on-demand value-added services in combination with existing communication networks, which includes the following steps:

Step 1, performing a synchronous operation on the program data of each service node in the value-added service realization system;

Step 2, the service node in the system where the sending user accesses the value-added service to realize the program on demand, and transmits the customized content and the receiving user number;

Step 3, the service realization notification system notifies the receiving user to listen to the on-demand program;

Step 4: The service node in the value-added service implementation system where the receiving user accesses nearby receives the on-demand program according to the customized content.

The above-mentioned voice-on-demand service implementation method, wherein, the step 2 specifically includes the following steps:

Step 21, the sending user uses the existing communication network to access the first voice access gateway nearby, and connects to the first service realization platform directly connected to the first voice access gateway;

Step 22: The sending user customizes the program on the first service realization platform and provides the number of the receiving user, selects a route for the customized content and the number of the receiving user, and stores it to the second service realization platform in the region to which the receiving user belongs.

The above-mentioned voice-on-demand service implementation method, wherein, the step 4 specifically includes the following steps:

Step 41, the receiving user uses the existing communication network to access the nearby voice access gateway at the location, and connects to the service realization platform directly connected to the voice access gateway;

Step 42, the service implementation platform in step 41 is connected to the service implementation platform in the area where the receiving user belongs to, and obtains the customized content;

In step 43, the service implementation platform in step 41 provides authentication for the receiving user according to the customized content, and provides corresponding services.

In the above-mentioned voice-on-demand service implementation method, the specific content of step 3 is: setting the service implementation notification system as a short message gateway, and using the short message to notify the receiving user of receiving the on-demand program.

In the method for realizing the voice-on-demand service mentioned above, the format of the data file in each service node is vox format or wav format.

The above-mentioned voice-on-demand service implementation method, wherein, in step 22, when the first service implementation platform is different from the second service implementation platform, the first service implementation platform sends the customized content and the receiving user number to the second service implementation platform. A voice access gateway, forwarded by the first voice access gateway to the voice access gateway at the place where the receiving user belongs, and then forwarded by the voice access gateway at the place where the receiving user belongs to the service realization platform at the place where the receiving user belongs.

The method for implementing the above-mentioned voice-on-demand service, wherein, the step 1 is specifically:

At the specified time, the interface server of the content management node transmits the new on-demand file to all nodes and stores it; or

All service nodes actively log in to the interface server of the content management node, download new on-demand files to the local service realization platform, and load them to the service realization platform.

In the above method for implementing voice-on-demand services, the on-demand files are transmitted between the service node and the interface server of the content management node using the FTP protocol.

In the method for realizing the voice-on-demand service, the sending user and the receiving user access the nearby voice access gateway through the PSTN network, GSM network or CDMA network.

The implementation method of the voice-on-demand service of the present invention sets service nodes in various places in the network, and the user does not need to transmit all the data when using the service, but only needs to transmit the code name of the program, which effectively saves resources and brings great convenience to the user .

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a schematic structural diagram of a value-added service realization platform of the present invention;

Fig. 2 is the connection schematic diagram of the value-added service realization system of the present invention;

Fig. 3 is the structural representation of voice access gateway of the present invention;

Fig. 4 realizes the first data flowchart of short message and voice-on-demand service by the value-added service realization system of the present invention;

Fig. 5 realizes the second data flowchart of short message and voice-on-demand service by value-added service realization system of the present invention;

Fig. 6 is a schematic diagram of the transmission file format of short message and voice-on-demand services realized by the value-added service realization system of the present invention.

Detailed ways

As shown in Figure 1, realize that the value-added service realization system of the present invention comprises a plurality of service platforms, and each service platform is all made up of voice access gateway 10 (VAG: Voice Access Gateway) and service realization platform 20 (SP: ServicePlatform).

As shown in FIG. 1 , the voice access gateway 10 is the basic platform of the value-added service system, used for communication with the telecommunication network 30 , and provides an open service implementation platform access interface for accessing the service implementation platform 20 .

The service realization platform 20 provides a service processing module, and on this basis, provides users with various voice value-added services.

The voice access gateway 10 cooperates with other value-added service systems 40 to provide users with multiple value-added services such as voice and text. In the embodiment of the present invention, the other value-added service system 40 is a short message gateway.

It can be seen from FIG. 1 that the telecommunication network 30 is the basis for service realization, and is located in the lower layer of the service system, providing users with voice access and providing bearer voice channels for services.

The value-added service realization system of the present invention is as shown in Figure 2, comprises a plurality of service nodes 1 that are separately arranged in different locations, and the described service nodes 1 are connected together by a data network or dedicated line 2 to form the value-added service of the present invention Implement the system.

The voice access gateway 10 is in charge of networking between service nodes, and the service realization platform 20 is in charge of service provision, completely getting rid of the independent and isolated bottleneck of the current voice value-added service system.

The voice access gateway VAG 10 is a connecting device between the SP 20 and the telecommunication network 30 (PSTN, GSM, CDMA, etc.). On the one hand, VAG 10 provides a communication channel for SP 20 to access the existing network to provide users with voice services; on the other hand, users can receive rich and diverse voice services provided by each SP20 through VAG 10.

In the voice value-added service system, other value-added service systems 40 play an auxiliary role. When SP 20 provides value-added service to a certain user, SP first sends a message notification to the called user through other value-added service systems (comprising SMS, WAP, etc.), instructing the user to listen to the corresponding value-added service.

The service realization platform 20 is located at the top layer of the value-added service realization system, constructs different business logics, and provides various value-added services to end users through the VAG 10 .

The connection between SP 20 and other VAG 10 is realized through the data network or dedicated line 2, and the SP access adopts the mode of "one-point access, whole network service". The network diagram is shown in Figure 2.

The VAG network can be a one-level or multi-level system. For a first-level system, each VAG 10 is interconnected through a data network or a dedicated line 2; for a multi-level system, the first-level VAGs 10 are interconnected through a data network or a dedicated line 2 , the other levels are respectively connected to the VAG of the upper level, and the connection between the non-first level VAGs is realized through the VAG of the upper level. catch.

The VAG network can adopt one-level or multi-level mode, or a mixed mode of one-level and multi-level mode.

VAG 10 is a connection system between common users and the service realization platform 20.

As shown in Figure 3, VAG 10 is mainly composed of front-end processor 101, voice gateway 102, router 103 and so on.

The front-end processor 101 realizes the following basic functions:

Voice channel switching function, respectively interconnected with the telecommunication network 30, SP 20, and voice gateway 102, to complete the voice channel access and switching functions;

The routing function can determine which SP the service access code is based on the user's access code, and send it to the corresponding SP business processing system; and

Call bill generation and traffic statistics function, as a billing collection point, can record detailed call bills, conduct traffic statistics according to time period, calling, called, etc., and provide operators with reference data for operation decision-making.

Voice gateway 102 realizes the following basic functions:

Realize real-time conversion from No.7 or PRI to H.323;

Realize the real-time conversion from voice to IP packet data.

Router 103 realizes the following basic functions:

As the access point for VAG 10 to access data network 2, realize the routing and forwarding of IP voice packets between VAG 10;

The interconnection between the voice platform 20 and other value-added service platforms 40 is realized.

The service realization platform 20 is located at the top layer of the voice value-added service system, and is used to construct service logic. Voice platform equipment can be mainly divided into business processing system, data center server, application server, operation control terminal, etc.

The business processing system is responsible for the interface with the voice access gateway system, completes the business exchange of the voice message system, and provides functions such as voice message and voice prompt guidance for business operations;

On the one hand, the data center server provides storage for voice data, so that users can listen, inquire, and listen again. The system will save voice data for a certain period of time unless the user actively deletes it, and the storage time can be set; on the other hand, it provides The storage of user information such as caller/called, user setting data, and other routing data is convenient for the application server to call and process these information.

The application server is the core of voice and short message business logic processing, and is a dedicated business server, which is used to provide functions such as control processing and data processing of the voice short message system. Considering security, data center server and application server are mutual backup;

The operation control terminal is used to provide daily maintenance of the business processing system on a graphical interface, manage voice and short message services, monitor and maintain the system, etc.

The method for implementing value-added services of SMS and voice-on-demand by the value-added service realization system of the present invention will be described in detail below in conjunction with FIGS. 1 to 3 .

First of all, the realization of SMS and voice-on-demand value-added services requires the organization of programs. In order to ensure the consistency of all service power-saving programs, uniform organization of programs, and complete programs for each node; according to specific rules, the programs are uniformly coded. The coding work of the program is in charge of a special management node, and the management node distributes the program to other nodes.

The SMS and voice-on-demand value-added services adopt a unified dedicated access number. The user dials this access number, and according to the system prompts, listens to, orders or listens to programs ordered by others, or directly calls the dedicated access number + called The program can be ordered by sending a text message through the number, and the content of the text message is the program name or program number, which can be ordered directly to the other party, or the audio program can be ordered through the website. The realization of on-demand broadcasting is provided by the service system at the place of access, and the delivery of programs is provided by the service system at the place where the called user belongs.

Transmission of on-demand programs: After the user completes the on-demand programs, the access service system creates special program-on-demand data packets, and transmits the program-on-demand service data packets to the called service node in real-time or non-real-time.

Listening to the program: the service system at the called place directly initiates an outbound call to the user, or, in the case of unsuccessful outbound call, sends a notification message to let the user dial to the local service system to listen to the program sent on demand.

The system has functions such as storage and forwarding, point-to-point sending, and group sending. The voice program on-demand service data packets are transmitted between the service nodes, and the calling number, called number, voice program code and other contents in the data packets.

The content management node system mainly completes the function of synchronizing voice programs in each service node, and the system equipment mainly includes data center servers, interface servers, storage devices, network devices, etc.

Data center server: mainly obtain various voice programs from other information sources, and store them in local storage devices after format conversion and renaming;

Interface server: mainly completes the interface with each service node platform system and completes the management of voice programs. The transmission of voice files between the content management node system and each voice service node platform system can be in the form of FTP. Specifically, the interface server of the content management node can actively FTP the new on-demand voice file to each voice service node platform at a specified time On a system-specific computer; each voice service node platform system can also actively log in to the content management node interface server, download the new on-demand file to the local voice platform through FTP, and load it to the voice service node platform; communication Different levels of passwords can be set to ensure system security; the interface server realizes the interconnection with the WAP gateway at the same time, and provides users with WAP pages about SMS and voice-on-demand services.

Network equipment: It is recommended to use the Internet and dedicated lines for communication between the content management node system and each voice service node platform and with the WAP gateway. The network equipment of the content management node system includes Ethernet switch equipment, router equipment connected to the Internet, firewall equipment, etc.

The process of the user sending voice and short message to order programs is basically the same as the above-mentioned point-to-point voice short message process.

When a user listens to voice and SMS on demand, if the user is a local user, the service will be directly provided by the home voice platform; when the user roams, it is necessary to exchange messages between the roaming voice platform and the home voice platform. Obtain the number of information that the user wants to listen to, and then the roaming voice platform provides voice and short message on-demand listening services to the called user. During specific implementation, first the roaming voice platform sends a message to the home voice platform, requesting the home voice platform to inquire whether the user has on-demand content, and the home voice platform informs the roaming site of the query result (order number) by means of a message voice platform. After the roaming voice platform receives the above message, it plays the on-demand content to the user.

The following two typical situations analyze the communication routing process of voice and SMS on-demand value-added services.

The MS1 user sends a voice message to the MS2 user who is not the service node, and the MS2 user listens to the voice message at its home location. The connection process is shown in Figure 4, including the following steps:

Step G1, MS1 accesses the nearby VAG-A of A through the telecommunication network;

Step G2, VAG-A is connected to the voice platform 1 of A, and the voice platform 1 provides voice prompts to guide the user to input the on-demand or customized voice program number and the called user's MS2 number, then hang up, and the voice platform 1 analyzes the called user's MS2 number , it is determined that MS2 is a remote user;

Step G3, service implementation platform A sends the user-customized content and MS2 user number to A's VAG-A;

Step G4, VAG-A analyzes the MS2 user number to find the route and connects to the VAG-B to which MS2 belongs;

Step G5, send the customized content and the user number of MS2 to the voice platform 2 of B where MS2 belongs via VAG-B;

In step G6, the service realization platform B notifies the short message gateway to send a text short message notification to MS2.

MS2 receives the voice message connection process at the home location:

Step H1, the MS2 user accesses the VAG-B of B nearby through the telecommunication network;

Step H2, the VAG-B at B is connected to the service implementation platform B at B, and the service implementation platform B provides voice prompts to guide the user to choose to listen to the voice message, and analyzes the MS2 number to determine that MS2 is a local user; the voice platform 2 provides MS2 Authenticate, and play the voice service customized by MS1 according to the customized program list.

When MS1 user sends a voice message to MS2 user in a different place, and both MS1 and MS2 roam to a different place, the connection process is shown in Figure 5, including the following steps:

Step I1, MS1 accesses VAG-B of B nearby through the mobile network;

Step I2, VAG-B is connected to the service implementation platform B of B, and the service implementation platform B provides a voice prompt to guide the user to input the voice program number on demand or customized and the MS2 number of the called user, then hang up, and the voice platform 2 analyzes the MS2 number, It is determined that MS2 is a local user (if MS2 is a remote user, the subsequent sending and connection process is the same as steps G3 to G6);

In step I3, the service realization platform B notifies the short message gateway to send a text short message notification to MS2.

MS2 receives voice message connection process in roaming area:

Step J1, the MS2 user accesses the nearby VAG-A of A through the mobile network;

Step J2, VAG-A is connected to the voice platform 1 of A, and the service implementation platform A provides a voice prompt to guide the user to choose to listen to the voice message, and analyzes the MS2 number to determine that MS2 is a remote user;

Step J3, service implementation platform A analyzes the user number of MS2, establishes a TCP/IP connection through VAG-A, VAG-B and its home voice platform 2, obtains the program code of the content customized by MS1 for MS2, and provides MS2 with the obtained content. corresponding voice service.

In SMS and voice-on-demand value-added services, the information that needs to be transmitted after interconnection between VAGs includes the following two main types:

One is the voice program on demand data file, when a user sends a voice program on demand to a remote user, the voice program on demand data file is sent to the place where the called party belongs, and then calls out, the called party answers, or a text message informs the called party to listen to the program . When directly sending the voice program on demand, since the voice file is large, it needs to consume more network resources, so it is necessary to compress the voice message in the voice program on demand and then transmit it. Voice program on-demand data packet compressed file packets are sent by establishing data channels between VAGs and transmitting through various protocols such as TCP/IP. According to the situation of the network, the voice program on-demand data packet file can be transmitted through a dedicated line, the Internet, etc.

The other is voice. When the user is in the roaming state, if he wants to listen to the voice-on-demand program stored in the home, he needs to establish a voice channel between the roaming area and the home VAG, so as to listen to the voice message. , or dedicated line for transmission.

After the decentralized construction of SMS and voice-on-demand business platforms, in order to ensure the consistency of business services, on the one hand, it is required that the content of voice programs in each business platform must be updated synchronously; There must be national unity. The voice and SMS on-demand service content management node is specially responsible for providing the integrated management function of voice and SMS programs of all service nodes.

The selected audio file formats are shown in the table below.

file format Sampling frequency Modulation Algorithm Companding rate encoding *.vox 8KHz ADPCM A Law 4bit *.vox 6KHz ADPCM muLaw 4bit *.wav 8KHz PCM A Law 8bit *.wav 6KHz PCM muLaw 8bit

The file name of the voice file will reflect the characteristics of the file content, the mode of on-demand, the source of the voice file, and the information of the format of the voice file. According to the above principles, the file name of the voice file is: ABBBBQQQQQ.vox, represented by 10 digits, where the first digit A is the information category, and the value is 0~9. Currently, 5, 6, 7, 8, 9 are temporarily used. Other values are reserved. When A is 5, 8 or 9, it means that the file is a voice file applicable to all service nodes. The user can customize or order the program for other users in the case of roaming or non-roaming. When A is 6 or 7, it means that the file is a local audio file, and the user can only customize or order the program on the audio platform where the audio file is located; the middle 4 digits BBBB are the number of the on-demand content, and the value is 0000~9999; ABBBB together constitute a user The SMS program number that needs to be entered when customizing or ordering voice programs; the last 5 digits are the enterprise code of the information source, which is mainly used for other users such as operator management.

After adopting decentralized business implementation platform, in order to realize unified business applicable to all business nodes, the information content of each business node must be updated synchronously. When users use services on cross-regional business realization platforms, there is no need to transfer voice packets between platforms Files only need to transmit the service number information customized by the user, and the user can use the principle of providing services by the nearest service platform to access the service platform, so as to ensure the quality of listening.

According to the above communication process, it can be seen that when users use voice and SMS on-demand services, the transmission of user-customized information may be involved in two situations:

Customize voice and SMS on demand for remote users;

When a user customizes or orders voice and SMS for a remote user, according to the above process, the customized or on-demand information will first need to be sent to the called voice platform so that the user can listen to it. At this time, the transmission of customized information between different places adopts the FTP protocol, and different levels of passwords or firewalls can be set to ensure system security. The transmitted content is a binary file, and the following is a naming method.

File name format: 3AAAAQQQQQYYYYMMDDNNNNNNN.VMI

Among them: 3AAAAQQQQQ indicates the node number of the voice platform, YYYYMMDD is the year, month and day, NNNNNNN is the serial number (7 digits) of each day, the value range is 0000000-9999999, VMI indicates that the voice message index file is sent, and its file format is shown in Figure 6 Show.

Another situation is: when the user listens to the voice-on-demand program in the roaming state, the principle of providing the service by the nearby voice platform is adopted, and the roaming voice platform provides the listening service. Customized information. Therefore, when a roaming user dials a dedicated access number to request listening, the roaming voice platform obtains the user's customized or on-demand information from the user's home voice platform.

In order to improve the efficiency of message transmission and minimize the time delay when listening in different places, information exchange adopts message transmission at this time.

SMS and voice-on-demand services can be billed in the form of information fee, communication fee or a combination of the two.

For the information fee, the voice platform can be used to send a text message notification to the user, and the information fee will be charged to the user according to the existing text message billing mode. The voice platform connects to the short message service system as a common service provider, sends a text short message notification to the target user, and generates a valid billing bill on the short message service system in the province where the billing user is located. single billing.

For communication fees, voice and SMS on-demand services can be billed according to the length of time. Billing raw data (referred to as CDR) is generated by the MSC and sent to the provincial billing center, and the provincial billing system completes the billing.

At the same time, the voice access gateway should have the characteristics of large capacity, high processing capacity, and high stability and reliability, so the switching part of the voice access gateway should also be carrier-class.

VAG switching equipment is located in the tandem office and signaling endpoint in the telecommunication network, and should meet the requirements of the "General Technical Specifications for Telephone Switching Equipment of the Ministry of Posts and Telecommunications" (YDN065-1997, Ministry of Posts and Telecommunications), but when the equipment needs to provide other Intelligent queuing and other functions beyond switching equipment shall be handled according to the requirements of intelligent queuing equipment;

The main components/modules of switching equipment should have dual backup configuration, including switching network, trunk module, subscriber module, signaling terminal, power supply module, etc.;

The switch is scalable in terms of key indicators such as traffic processing capability, signaling link, and number of trunk lines;

Provide E1 digital interface for CDMA/GSM and other telecommunication networks;

Can provide standard STM-1 optical port or electrical port for relay interconnection;

Support R2, ISDN PRI, SS7TUP, ISUP, TCAP, MAP, IS41 and other signaling;

Circuit switching capacity can be smoothly expanded from 8E1 to 1000E1;

A single module can provide a maximum of 32 signaling links;

Packet forwarding capability greater than 1Mpps;

Support physical interface with rate above 1Gbps.

Of course, the present invention can also have other various embodiments, and those skilled in the art can make various corresponding changes and deformations according to the present invention without departing from the spirit and essence of the present invention, but these corresponding Changes and deformations should all belong to the protection scope of the appended claims of the present invention.

Claims (9)

1. A method for realizing voice-on-demand services, which is used to provide users with voice-on-demand value-added services in conjunction with existing communication networks, which is characterized in that it comprises the following steps: Step 1, performing a synchronous operation on the program data of each service node in the value-added service realization system; Step 2, the sending user uses the existing communication network to access the value-added service nearby to realize the service node in the system to order the program, and transmits the customized content and the receiving user number to the service node at the place where the receiving user belongs; Step 3, the service realization notification system notifies the receiving user to listen to the on-demand program; Step 4, the receiving user utilizes the existing communication network to access the service node in the value-added service implementation system to receive the on-demand program according to the customized content. 2. The method for implementing voice-on-demand services according to claim 1, wherein said step 2 specifically includes the following steps: Step 21, the sending user uses the existing communication network to access the first voice access gateway nearby, and connects to the first service realization platform directly connected to the first voice access gateway; Step 22: The sending user customizes the program on the first service realization platform and provides the number of the receiving user, selects a route for the customized content and the number of the receiving user, and stores it to the second service realization platform in the region to which the receiving user belongs. 3. The method for implementing voice-on-demand services according to claim 2, wherein said step 4 specifically includes the following steps: Step 41, the receiving user uses the existing communication network to access the nearby voice access gateway at the location, and connects to the service realization platform directly connected to the voice access gateway; Step 42, the service implementation platform in step 41 is connected to the service implementation platform in the area where the receiving user belongs to, and obtains the customized content; In step 43, the service implementation platform in step 41 provides authentication for the receiving user according to the customized content, and provides corresponding services. 4. The method for implementing voice-on-demand services according to claim 3, wherein the specific content of step 3 is: setting the service implementation notification system as a short message gateway, and using short messages to notify receiving users to listen to on-demand programs. 5. The method for implementing voice-on-demand services according to claim 3, wherein the format of the data files in each service node is vox format or wav format. 6. The voice-on-demand service implementation method according to claim 3, characterized in that in step 22, when the first service implementation platform is different from the second service implementation platform, the first service implementation platform will The customized content and the number of the receiving user are sent to the first voice access gateway, forwarded by the first voice access gateway to the voice access gateway of the receiving user's home location, and forwarded by the voice access gateway of the receiving user's home location to the receiving user's home local business realization platform. 7. The method for implementing voice-on-demand services according to claim 3, wherein the step 1 is specifically: At the specified time, the interface server of the content management node transmits the new on-demand file to all service nodes and stores it; or All service nodes actively log in to the interface server of the content management node, download new on-demand files to the local service realization platform, and load them to the service realization platform. 8. The method for implementing voice-on-demand services according to claim 7, wherein the new on-demand files are transmitted between the interface servers of all service nodes and content management nodes using the FTP protocol. 9. The method for implementing voice-on-demand services according to claim 3, wherein the sending user and the receiving user access the nearby voice access gateway through the PSTN network, GSM network or CDMA network.

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