SDH / PTN-based voice scheduling unified platform construction method and system

Abstract

The invention relates to the technical field of communication, and discloses a voice scheduling unified platform construction method and system based on SDH / PTN, and the method comprises the steps: deploying a soft switching platform and a server, configuring a soft switching data network based on an SDH / PTN transmission system, configuring an IP interface gateway on an existing stored program control exchange, and enabling the IP interface gateway to be in butt joint with the soft switching platform, thereby achieving voice intercommunication; the method comprises the following steps of: accessing a scheduling soft switching system in an IP (Internet Protocol) mode, running a scheduling service on a dual-mode scheduling desk in dual networks, and arranging an IP phone or an IAD (Inter-Access Device) analog access gateway and an analog phone at a corresponding site; through an NTP time service mode, time unification of all devices in program-controlled switching and soft switching is realized. A soft switch platform is interconnected with an emergency satellite communication network, an IP telephone is deployed through a satellite data network, the soft switch platform is intercommunicated with other telephones and a public network PSTN, and conference and video call functions based on the satellite network are realized. According to the method, the overall performance of the voice scheduling exchange system is improved, and a safer, more stable, more efficient and more flexible communication environment is provided for users.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a method and system for constructing a unified voice dispatching platform based on SDH / PTN. Background Art

[0002] The traditional river basin power station dispatching exchange network is mainly based on program-controlled circuit exchange. Some MAP series dispatching switch main system equipment has been used for 12 years or more, and the equipment is aging and the failure rate is increasing. Some remote modules have no self-switching function, and the circuit networking mode can only support pure voice dispatching functions, and the switch functions are single. With the gradual expansion of the company's river basin power production business, the basic voice service can no longer meet the needs of command and dispatch production, and it is necessary to gradually expand multimedia dispatching services, such as video dispatching, video conferencing, dispatching broadcasting, and intelligent dispatching.

[0003] At the same time, in order to improve the security and stability of the dispatching and switching system of the centralized control center, it is necessary to add an IP switching system as a backup dispatching means for the centralized control center. The dual system platforms operate independently, and the dispatching business functions are concentrated on the dual-network operation of the existing dual-mode dispatching platform. Summary of the invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a method for constructing a unified voice dispatching platform based on SDH / PTN, which can improve the usability and reliability of centralized voice dispatching by constructing a voice dispatching system that integrates program-controlled switching and broadband switching dual networks, realize unified numbering and networking with program-controlled switching and broadband switching systems, interconnect with the company's internal telephones and public PSTN, and realize voice and video call functions based on satellite networks, thereby expanding the application scope and functions of emergency communication systems and bringing great convenience.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions, a method for constructing a unified voice dispatching platform based on SDH / PTN, including: a soft switching platform and a server, configuring a soft switching data network based on the SDH / PTN transmission system, configuring an IP interface gateway on the existing program-controlled switch to connect with the soft switching platform to achieve voice interconnection; using IP to access the dispatching soft switching system, the dispatching business functions are concentrated on the dual-network operation of the dual-mode dispatching desk, and IP phones or IAD analog access gateways and analog phones are arranged at the corresponding sites; through the NTP time synchronization method, the time of each program-controlled switch and soft switching device is unified; the soft switching platform is interconnected with the emergency satellite communication network, and IP phones are deployed through the satellite data network, and they are interconnected with other phones and the public PSTN, and conference and video call functions based on the satellite network are realized.

[0007] As a preferred solution of the method for constructing a unified voice dispatching platform based on SDH / PTN described in the present invention, the soft switch platform includes a soft switch control layer, a soft switch service layer, a soft switch transmission layer and a soft switch access layer.

[0008] As a preferred solution of the method for constructing a unified voice scheduling platform based on SDH / PTN described in the present invention, the soft switch control layer includes deploying a soft switch core platform in the centralized control center, and the core platform realizes the call control function of the network, including call routing, management control, connection control and protocol intercommunication. At the same time, as a core control device, it has an internal hardware 1+1 redundant hot standby working mode and adopts HA high availability function.

[0009] As a preferred solution of the method for constructing a unified voice dispatching platform based on SDH / PTN described in the present invention, wherein: the soft switch service layer includes providing service support for the entire network, and the main equipment of the service layer includes a media resource server, a high-definition video conferencing server, a network management server, and a recording and video recording server;

[0010] The media resource server provides users with centralized voice media resource services, conference services, and IVR services; the high-definition video conferencing server supports 720P high-definition multi-screen, as well as mixed access to conferences with standard-definition and high-definition terminals; the network management server provides users with a centralized management and maintenance interface for the soft switching system, supports maintenance of soft switching equipment across the entire network, and uniformly manages and monitors various network elements in the network, making it convenient for users to instantly understand the operating status of the network; the recording and video recording server records and records the terminal equipment in the soft switching system, making it convenient for subsequent voice record tracing.

[0011] As a preferred solution of the method for constructing a unified voice dispatching platform based on SDH / PTN described in the present invention, the soft switch transmission layer and the soft switch access layer include: the soft switch transmission layer uses a dedicated IP data network to encapsulate voice data into IP packets, transmits the IP packets to the destination through the SDH / PTN network, decapsulates the IP packets at the receiving end, and restores the original voice data;

[0012] The soft switch access layer is implemented with various gateways and terminals. The terminal equipment accesses the soft switch system through the IP interface gateway. The terminal initiates a call, and the access layer sends the call request to the control layer. The control layer selects the best path based on the call request and establishes a call connection. The transport layer encapsulates the voice data into IP packets and transmits them to the destination through the SDH / PTN network. When the call ends, the access layer sends an end signal to the control layer, and the control layer releases the call connection.

[0013] As a preferred solution of the method for constructing a unified voice dispatching platform based on SDH / PTN described in the present invention, wherein: the dual-network operation on the dual-mode dispatching station includes, on the dual-mode dispatching station, using network adaptation technology to allow the dispatching station to simultaneously access a traditional circuit switching network and an IP-based soft switching network;

[0014] The dispatch console is integrated with dual network adapters, one adapter is used to connect to the traditional circuit switching network, and the other adapter is used to connect to the IP soft switching network. Through the gateway protocol conversion module, the seamless conversion of the two network protocols and the unified processing of dispatch instructions are realized;

[0015] When a dispatch instruction is issued, the GPTM module first determines the instruction type. If it is an IP network instruction, it is sent to the soft switch network through the IP adapter; if it is a circuit switching instruction, it is sent through the circuit switching adapter;

[0016] After the dispatch desk or terminal device at the receiving end receives the instruction, it also performs protocol conversion through the GPTM module to ensure the correct execution of the instruction. The dispatch desk has a dual-network status monitoring function, which displays the status of the two networks in real time and automatically switches between the networks to ensure the continuity of the dispatch business.

[0017] As a preferred solution of the method for constructing a unified voice scheduling platform based on SDH / PTN described in the present invention, the NTP timing method includes: when the device is started, the security module generates an encrypted time request and sends it to the NTP server. After receiving the request, the NTP server generates an encrypted response containing the current accurate timestamp and returns it to the device. By decrypting the response, the time information is extracted, and the device clock is adjusted to achieve time synchronization;

[0018] Program-controlled switching equipment regularly synchronizes time with the NTP server through built-in or external NTP client modules. Soft switching equipment also synchronizes time with the NTP server through built-in NTP client modules using encrypted timestamp methods, and dynamically adjusts the synchronization frequency according to network conditions to reduce network congestion and clock drift.

[0019] Another object of the present invention is to provide a unified voice dispatch platform construction system based on SDH / PTN, which can realize the integration of program-controlled switching and soft switching, NTP time synchronization, interconnection with emergency satellite communication networks, and integration of multimedia communication functions, thereby improving the flexibility and emergency response capabilities of the system.

[0020] As a preferred solution of the SDH / PTN-based voice dispatch unified platform construction system described in the present invention, it includes: a soft switch core platform module, a business support layer module, a transport layer module, an access layer module, and a dual-mode dispatch console module;

[0021] The soft switch core platform module implements call control functions, including call routing, management control, connection control and protocol intercommunication, and adopts 1+1 redundant hot standby and HA high availability functions to ensure the stability and reliability of the system;

[0022] The business support layer module provides business support for the entire network, including media resource servers, high-definition video conferencing servers, network management servers, and audio and video recording servers. These servers provide voice media resource services, conference services, IVR services, high-definition video conferencing support, system management and maintenance interfaces, and audio and video recording functions;

[0023] The transport layer module uses a dedicated IP data network to encapsulate voice data into IP packets and transmit them to the destination through the SDH / PTN network, ensuring real-time and efficient transmission of voice data;

[0024] The access layer module realizes access through various gateways and terminals. The terminal equipment accesses the soft switch system through the IP interface gateway, initiates and receives call requests, and establishes and releases call connections;

[0025] The dual-mode dispatching console module adopts network adaptation technology to allow the dispatching console to access the traditional circuit switching network and the IP-based soft switching network at the same time.

[0026] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and is characterized in that when the processor executes the computer program, the steps of a method for constructing a unified voice scheduling platform based on SDH / PTN are implemented.

[0027] A computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the computer program implements the steps of a method for constructing a unified voice scheduling platform based on SDH / PTN.

[0028] The beneficial effects of the present invention are as follows: by constructing a unified voice dispatching platform based on SDH / PTN, centralized management and control of voice dispatching is achieved, and dispatching efficiency and reliability are improved. Intercommunication between the soft switching platform and the program-controlled switch and the emergency satellite communication network is achieved, ensuring communication capabilities in various network environments. The dual-mode dispatching console can access the circuit switching network and the IP soft switching network at the same time, ensuring the continuity of dispatching services in any network environment. The soft switching core platform adopts 1+1 redundant hot standby and HA high availability functions to ensure the stability and reliability of the system. Through the NTP timing method, the time of each device is unified, which is crucial for the dispatching system and ensures the accurate execution of dispatching instructions. The business support layer provides a variety of functions such as media resource services, high-definition video conferencing, network management, audio and video recording, etc., to meet different business needs.

[0029] Through the dedicated IP data network and SDH / PTN network, efficient and real-time transmission of voice data is guaranteed. The access layer module provides flexible access methods through a variety of gateways and terminal devices to adapt to different network environments and user needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0031] Figure 1 A schematic flow chart of a method for constructing a unified voice scheduling platform based on SDH / PTN provided in one embodiment of the present invention.

[0032] Figure 2 A network diagram of the fusion of soft switching and circuit switching of a method for constructing a unified voice scheduling platform based on SDH / PTN provided in one embodiment of the present invention.

[0033] Figure 3 A schematic diagram of working modules of a system for constructing a unified voice dispatching platform based on SDH / PTN provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0035] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0037] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0038] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Example 1, reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, and provides a method for constructing a unified voice scheduling platform based on SDH / PTN, including:

[0041] S1: Deploy soft switch platform and server, configure soft switch data network based on SDH / PTN transmission system, configure IP interface gateway on existing program-controlled switch to connect with soft switch platform, and realize voice interconnection.

[0042] Furthermore, the softswitch platform includes a softswitch control layer, a softswitch service layer, a softswitch transmission layer and a softswitch access layer.

[0043] Soft switch control layer: G2S soft switch core platform SW9000 series SW9112 is deployed in the centralized control center. The core platform mainly realizes the call control function of the network, including call routing, management control, connection control and protocol intercommunication, etc. At the same time, as the core control equipment, due to its high importance, it has an internal hardware 1+1 redundant hot standby working mode and adopts HA high availability function.

[0044] Soft switch service layer: mainly provides service support for the whole network. The main equipment of the service layer includes MS media resource server, MCS HD video conferencing server, G2M5012 network management server, and MR4112 recording and video server. Among them, MS media resource server provides users with centralized voice media resource services, conference services, and IVR services. MCS HD video conferencing server has advanced architecture design and powerful media processing capabilities, which can realize 720P HD multi-screen (32 HD video conference members, maximum display 8 parties), and support mixed access to conferences for standard definition and HD terminals. The network management server G2M5012 provides users with a centralized management and maintenance interface for the soft switch system, supports maintenance of soft switch equipment in the whole network, and realizes unified management and monitoring of various network elements in the network, so that users can instantly understand the operation status of the network. The recording and video server can record and record the terminal equipment in the soft switch system, which is convenient for subsequent voice record backtracking.

[0045] Soft switch transmission layer: uses a dedicated IP data network to encapsulate voice data into IP packets, transmits the IP packets to the destination through the SDH / PTN network, decapsulates the IP packets at the receiving end, and restores the original voice data;

[0046] Softswitch access layer: implemented with various gateways and terminals. The terminal equipment accesses the softswitch system through the IP interface gateway. The terminal initiates a call, and the access layer sends the call request to the control layer. The control layer selects the best path based on the call request and establishes a call connection. The transport layer encapsulates the voice data into IP packets and transmits them to the destination through the SDH / PTN network. When the call ends, the access layer sends an end signal to the control layer, and the control layer releases the call connection.

[0047] S2: Use IP to access the dispatching soft switch system. The dispatching business functions are concentrated on the dual-mode dispatching desk and run on dual networks. IP phones or IAD analog access gateways and analog phones are deployed at the corresponding sites.

[0048] Furthermore, on the dual-mode dispatch desk, network adaptation technology is used to allow the dispatch desk to access both the traditional circuit-switched network and the IP-based soft-switched network;

[0049] The dispatch console is integrated with dual network adapters, one adapter is used to connect to the traditional circuit switching network, and the other adapter is used to connect to the IP soft switching network. Through the gateway protocol conversion module, the seamless conversion of the two network protocols and the unified processing of dispatch instructions are realized;

[0050] When a dispatch instruction is issued, the GPTM module first determines the instruction type. If it is an IP network instruction, it is sent to the soft switch network through the IP adapter; if it is a circuit switching instruction, it is sent through the circuit switching adapter;

[0051] After the dispatch desk or terminal device at the receiving end receives the instruction, it also performs protocol conversion through the GPTM module to ensure the correct execution of the instruction. The dispatch desk has a dual-network status monitoring function, which displays the status of the two networks in real time and automatically switches between the networks to ensure the continuity of the dispatch business.

[0052] It should be noted that the IP phone is connected to the soft switch system of the centralized control center through wireless signals. When the phone is started, it automatically sends a configuration request to the configuration server of the centralized control center. The configuration server sends configuration information based on the location of the phone and the network status, and the phone receives and applies the configuration. During a call, the voice data of the phone is transmitted to the soft switch system in the form of encrypted IP packets to ensure communication security.

[0053] Furthermore, the AD analog access gateway adopts a modular design, and the number of analog ports can be flexibly configured according to site requirements. The gateway has a built-in intelligent identification module that can automatically identify and adapt to different types of analog phones. Analog phones are connected to the IAD analog access gateway via standard telephone lines.

[0054] The IAD gateway converts the voice signals of analog phones into digital signals and sends them to the soft switch system through the IP network.

[0055] S3: Through the NTP timing method, the time of each program-controlled switching and soft switching equipment is unified.

[0056] Furthermore, when the device starts, the security module generates an encrypted time request and sends it to the NTP server. After receiving the request, the NTP server generates an encrypted response containing the current precise timestamp and sends it back to the device. By decrypting the response, the time information is extracted and the device clock is adjusted to achieve time synchronization;

[0057] Program-controlled switching equipment regularly synchronizes time with the NTP server through built-in or external NTP client modules. Soft switching equipment also synchronizes time with the NTP server through built-in NTP client modules using encrypted timestamp methods, and dynamically adjusts the synchronization frequency according to network conditions to reduce network congestion and clock drift.

[0058] S4: Interconnect the soft switch platform with the emergency satellite communication network, deploy IP phones through the satellite data network, and communicate with other phones and the public PSTN, and realize conference and video call functions based on the satellite network.

[0059] Furthermore, the interconnection between the soft switch platform and the satellite communication network adopts a hybrid routing strategy to interconnect the soft switch platform with the emergency satellite communication network. A satellite communication gateway (SatGW) is deployed on the soft switch platform, which has the ability to receive and send satellite signals. SatGW interfaces with the control layer and transport layer of the soft switch platform to achieve data exchange and protocol conversion.

[0060] SatGW receives satellite signals through satellite antennas and converts them into IP packets. SatGW analyzes the destination of the packet and directly forwards it if it is a device in the soft switch network; if it is a public PSTN or other network, it is routed through the corresponding gateway.

[0061] IP phone terminals are deployed in the satellite coverage area. These terminals access the satellite data network through satellite modems (SatModem). When the terminal initiates a call, it sends the call request to SatGW. SatGW converts the call request into a satellite communication protocol and sends it through the satellite network. After receiving the call request, the receiving SatGW converts it into an IP phone protocol and sends it to the target terminal through the ground network. During the call, voice data is transmitted in real time through the satellite network and the ground network.

[0062] Furthermore, a multipoint control unit (MCU) is integrated in SatGW to handle multipoint conferences and video calls. The conference initiator sends a conference invitation through an IP phone or video terminal. The MCU of SatGW receives the invitation and broadcasts it to other participating terminals through the satellite network. The participating terminals receive the conference signal and establish a connection with the MCU through the satellite network. The MCU is responsible for mixing audio and encoding and decoding video streams to ensure the smooth progress of the meeting.

[0063] Embodiment 2, the second embodiment of the present invention, is different from the previous embodiment in that:

[0064] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0065] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0066] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0067] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0068] Example 3, reference Figure 3 , which is an embodiment of the present invention, provides a unified voice dispatch platform construction system based on SDH / PTN, characterized in that it includes a soft switch core platform module 1, a service support layer module 2, a transport layer module 3, an access layer module 4, and a dual-mode dispatch console module 5;

[0069] Softswitch core platform module 1 implements call control functions, including call routing, management control, connection control and protocol intercommunication, and adopts 1+1 redundant hot standby and HA high availability functions to ensure the stability and reliability of the system;

[0070] Business support layer module 2 provides business support for the entire network, including media resource servers, high-definition video conferencing servers, network management servers, and audio and video recording servers. These servers provide voice media resource services, conference services, IVR services, high-definition video conferencing support, system management and maintenance interfaces, and audio and video recording functions;

[0071] The transport layer module 3 uses a dedicated IP data network to encapsulate voice data into IP packets and transmit them to the destination through the SDH / PTN network, ensuring real-time and efficient transmission of voice data;

[0072] Access layer module 4, access is achieved through various gateways and terminals. Terminal equipment accesses the soft switch system through the IP interface gateway, initiates and receives call requests, and establishes and releases call connections;

[0073] The dual-mode dispatching console module 5 adopts network adaptation technology to allow the dispatching console to access the traditional circuit switching network and the IP-based soft switching network at the same time.

[0074] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for constructing a unified voice dispatching platform based on SDH / PTN, characterized in that: include, Deploy soft switch platform and server, configure soft switch data network based on SDH / PTN transmission system, configure IP interface gateway on existing program-controlled switch to connect with soft switch platform, and realize voice interconnection; Use IP to access the dispatching soft switch system. The dispatching business functions are concentrated on the dual-mode dispatching desk and run on dual networks. IP phones or IAD analog access gateways and analog phones are deployed at the corresponding sites. Through NTP timing mode, the time of each device of program-controlled switching and soft switching can be unified; The soft switch platform is interconnected with the emergency satellite communication network, IP phones are deployed through the satellite data network, and they are interconnected with other phones and the public PSTN network, and conference and video call functions based on the satellite network are realized.

2. The method for constructing a unified voice dispatching platform based on SDH / PTN as claimed in claim 1, characterized in that: The soft switch platform includes a soft switch control layer, a soft switch service layer, a soft switch transmission layer and a soft switch access layer.

3. The method for constructing a unified voice dispatching platform based on SDH / PTN as claimed in claim 2, characterized in that: The soft switch control layer includes deploying a soft switch core platform in the centralized control center. The core platform implements the call control function of the network, including call routing, management control, connection control and protocol intercommunication. At the same time, as a core control device, it has an internal hardware 1+1 redundant hot standby working mode and adopts HA high availability function.

4. The method for constructing a unified voice dispatching platform based on SDH / PTN as claimed in claim 3, characterized in that: The soft switch service layer includes providing service support for the entire network. The main equipment of the service layer includes a media resource server, a high-definition video conferencing server, a network management server, and a recording and video recording server; The media resource server provides users with centralized voice media resource services, conference services, and IVR services; the HD video conference server supports 720P HD multi-screen, as well as mixed access to conferences with SD and HD terminals; The network management server provides users with a centralized management and maintenance interface for the soft switch system, supports maintenance of soft switch equipment across the entire network, and performs unified management and monitoring of various network elements in the network, making it convenient for users to instantly understand the operating status of the network; The recording and video recording server records and records the terminal devices in the soft switch system to facilitate the subsequent voice record tracing.

5. The method for constructing a unified voice dispatching platform based on SDH / PTN as claimed in claim 4, characterized in that: The soft switch transmission layer and the soft switch access layer include: the soft switch transmission layer uses a dedicated IP data network to encapsulate voice data into IP packets, transmits the IP packets to the destination through the SDH / PTN network, decapsulates the IP packets at the receiving end, and restores the original voice data; The soft switch access layer is implemented with various gateways and terminals. The terminal equipment accesses the soft switch system through the IP interface gateway. The terminal initiates a call, and the access layer sends the call request to the control layer. The control layer selects the best path based on the call request and establishes a call connection. The transport layer encapsulates the voice data into IP packets and transmits them to the destination through the SDH / PTN network. When the call ends, the access layer sends an end signal to the control layer, and the control layer releases the call connection.

6. The method for constructing a unified voice dispatching platform based on SDH / PTN as claimed in claim 5, characterized in that: The dual-network operation on the dual-mode dispatching station includes: on the dual-mode dispatching station, using network adaptation technology to allow the dispatching station to simultaneously access a traditional circuit switching network and an IP-based soft switching network; The dispatch console is integrated with dual network adapters, one adapter is used to connect to the traditional circuit switching network, and the other adapter is used to connect to the IP soft switching network. Through the gateway protocol conversion module, the seamless conversion of the two network protocols and the unified processing of dispatch instructions are realized; When a dispatch instruction is issued, the GPTM module first determines the instruction type. If it is an IP network instruction, it is sent to the soft switch network through the IP adapter; if it is a circuit switching instruction, it is sent through the circuit switching adapter; After the dispatch desk or terminal device at the receiving end receives the instruction, it also performs protocol conversion through the GPTM module to ensure the correct execution of the instruction. The dispatch desk has a dual-network status monitoring function, which displays the status of the two networks in real time and automatically switches between the networks to ensure the continuity of the dispatch business.

7. The method for constructing a unified voice dispatching platform based on SDH / PTN as claimed in claim 6, characterized in that: The NTP timing method includes: when the device is started, the security module generates an encrypted time request and sends it to the NTP server. After receiving the request, the NTP server generates an encrypted response containing the current accurate timestamp and sends it back to the device. By decrypting the response, the time information is extracted and the device clock is adjusted to achieve time synchronization; Program-controlled switching equipment regularly synchronizes time with the NTP server through built-in or external NTP client modules. Soft switching equipment also synchronizes time with the NTP server through built-in NTP client modules using encrypted timestamp methods, and dynamically adjusts the synchronization frequency according to network conditions to reduce network congestion and clock drift.

8. A system using the method for constructing a unified voice dispatching platform based on SDH / PTN as claimed in any one of claims 1 to 7, characterized in that: It includes soft switch core platform module, business support layer module, transmission layer module, access layer module and dual-mode dispatching console module; The soft switch core platform module implements call control functions, including call routing, management control, connection control and protocol intercommunication, and adopts 1+1 redundant hot standby and HA high availability functions to ensure the stability and reliability of the system; The business support layer module provides business support for the entire network, including media resource servers, high-definition video conferencing servers, network management servers, and audio and video recording servers. These servers provide voice media resource services, conference services, IVR services, high-definition video conferencing support, system management and maintenance interfaces, and audio and video recording functions; The transport layer module uses a dedicated IP data network to encapsulate voice data into IP packets and transmit them to the destination through the SDH / PTN network, ensuring real-time and efficient transmission of voice data; The access layer module realizes access through various gateways and terminals. The terminal equipment accesses the soft switch system through the IP interface gateway, initiates and receives call requests, and establishes and releases call connections; The dual-mode dispatching console module adopts network adaptation technology to allow the dispatching console to access the traditional circuit switching network and the IP-based soft switching network at the same time.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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