Voice gateway equipment and cross-network service communication method and system

Abstract

The invention discloses voice gateway equipment and a cross-network service communication method. The equipment comprises a channel adaptation unit, a service access unit, a service exchange unit and a management control unit. The method comprises the following steps: firstly, an FDMA satellite terminal in an FDMA integrated service network initiates a call application to voice gateway equipment, wherein the call application carries channel and key distribution information; then, the voice gateway equipment is in butt joint with a two-wire interface and a four-wire interface provided by the FDMA channel terminal, adapts analog telephone subscriber line signaling, performs unified call control after performing normalization processing on call control signaling of analog subscribers, provides a voice interface with an automatic telephone network, converts and exchanges different types of voice packets, and transmits the converted voice packets to the FDMA channel terminal; and voice intercommunication between the FDMA integrated service network satellite network system and the ground automatic telephone network system is realized. According to the invention, interconnection and intercommunication of analog voice services among different network systems and interconnection and intercommunication of analog voice services between a satellite communication network system and a ground automatic telephone network are realized.

Description

Technical Field

[0001] This invention relates to the field of electronic communication technology, and in particular to a voice gateway device and a cross-network service communication method and system. Background Technology

[0002] Voice gateway devices are mainly configured in ground fixed stations such as central stations and regional stations to realize the interconnection and interoperability of analog voice services between different network systems such as satellite communication networks, TDMA integrated service networks, and FDMA integrated service networks. They also realize the interconnection and interoperability of analog voice services between satellite communication networks and terrestrial automatic telephone networks. Furthermore, they support the interconnection and interoperability between analog voice services of the aforementioned satellite communication networks and grid SIP voice services, and interconnect with other network systems such as access grids. Based on the interconnection and interoperability strategy of the network management system, they can realize the interconnection and interoperability control of different levels such as private networks, transparent subnets, processing subnets, and users.

[0003] Existing voice gateway devices are mostly for intra-network business communication. For example, invention patent CN 102724371 A provides a voice gateway and a method for establishing a call through the voice gateway, which is used to establish a call connection between an external telephone and a local telephone. It also provides a method for calling an external telephone through the voice gateway and a method for receiving external telephone calls using the voice gateway. This improves the user's operational convenience and reduces the workload of the external proxy server. However, it is limited to intra-network business communication and cannot realize the interconnection and interoperability of analog voice services between different network systems such as broadband satellite communication network, TDMA integrated service network, FDMA integrated service network, and Tiantong satellite communication network, as well as the interconnection and interoperability of analog voice services between satellite communication network system and terrestrial automatic telephone network. Utility model patent CN 209201160 U discloses a multi-network converged voice gateway, which includes multiple transceivers, multiple converters, and a controller. Through these transceivers, it connects to one or more of the following: walkie-talkies, individual soldier devices, data radios, microphones, and landline telephones, enabling interconnection and interoperability between different trunked voice systems. It can meet the access requirements of voice devices such as walkie-talkies, individual soldier devices, and data radios, helping to adapt to various application environments, especially emergency situations, in terms of voice communication requirements. It can also connect to mobile phones, IP networks, and electronic devices through GSM modules and communication modules, realizing mobile phone voice communication, VoIP voice communication, and digital voice communication functions. It can utilize the network for cross-regional and cross-trunked voice system calls, enriching the functionality of the voice gateway. However, it cannot achieve interconnection and interoperability of analog voice services between different network systems or between satellite communication networks and terrestrial automatic telephone networks.

[0004] Therefore, there is an urgent need to invent a voice gateway device that enables interconnection and interoperability of analog voice services between different network systems such as broadband satellite communication networks, TDMA integrated service networks, FDMA integrated service networks, and Tiantong satellite communication networks, as well as between satellite communication networks and terrestrial automatic telephone networks. Summary of the Invention

[0005] The purpose of this invention is to provide a voice gateway device and a cross-network service communication method and system, thereby realizing the interconnection and interoperability of analog voice services between different network systems such as broadband satellite communication network, TDMA integrated service network, FDMA integrated service network, and Tiantong satellite communication network, as well as the interconnection and interoperability of analog voice services between satellite communication network system and terrestrial automatic telephone network.

[0006] The technical solution to achieve the purpose of this invention is: a voice gateway device, including a channel adaptation unit, a service access unit, a service switching unit, and a management and control unit;

[0007] The channel adaptation unit is used for the connection between the FDMA integrated service network channel and the terrestrial automatic telephone network, and completes the monitoring, selection and control of each channel resource. At the same time, it provides an interface in the voice gateway device to the service access unit and the service switching unit, providing channel information and controlling the channel.

[0008] The service access unit interfaces with the two- or four-line interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the analog user's call control signaling, and then hands it over to the call session control module of the service switching unit for unified call control.

[0009] The service switching unit provides a voice interface with the automatic telephone network, converts and exchanges different types of voice packets, and enables voice interoperability between different satellite network systems and terrestrial automatic telephone network systems;

[0010] The management and control unit is used to manage and control the channel adaptation unit, service access unit, and service switching unit.

[0011] A cross-network service communication method based on the voice gateway device includes the following steps:

[0012] Step 1: The FDMA satellite terminal in the FDMA integrated services network initiates a call request to the voice gateway device, carrying channel and key allocation information;

[0013] Step 2: The service access unit of the voice gateway device receives the call request, connects with the two- or four-line interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the analog user's call control signaling, and then hands it over to the call session control module of the service switching unit for unified call control.

[0014] Step 3: The service switching unit receives the call control signaling and sends the session establishment request information to the channel adaptation unit;

[0015] Step 4: After receiving the session establishment request information, the channel adaptation unit triggers the application for channel resources. Based on the service attributes and resource requirements, the channel adaptation unit queries the list of available channels and selects an available channel to return to the service switching unit.

[0016] Step 5: The service switching unit replies to the service access unit with the call response, carrying the target channel addressing information. The service access unit obtains the status of the connected channel and completes the channel selection required for the call.

[0017] Step 6: The service access unit initiates a call request to the target network automatic telephone network and sends it to the program-controlled exchange of the automatic telephone network;

[0018] Step 7: The automated telephone network's program-controlled exchange converts the digital signal into a telephone signal. After the signaling process within the automated telephone network, the call request is sent to the automated telephone network's telephone.

[0019] Step 8: After receiving a call request, the telephone in the automatic telephone network rings and sends the ringing signal and off-hook signal to the other end terminal.

[0020] Furthermore, in step 4, after receiving the session establishment request information, the channel adaptation unit triggers the request for channel resources. Based on the service attributes and resource requirements, the channel adaptation unit queries the list of available channels and selects an available channel to return to the service switching unit, as detailed below:

[0021] After receiving the session establishment request information, the channel adaptation unit extracts the terminal channel ID, service type, and bandwidth requirement information, searches the service status information table, and if a matching information is found, it notifies the service switching unit that a duplicate connection has occurred; otherwise, it generates a new service status table entry and triggers a satellite channel application. Based on the application result, it notifies the service switching unit to allow or deny service access.

[0022] Furthermore, in step 8, after receiving a call request, the telephone in the automatic telephone network rings and sends the ringing signal and the off-hook signal to the peer terminal, as follows:

[0023] Step 8.1: After receiving a call request, the telephone in the automatic telephone network rings and sends the ringing signal from the automatic telephone network to the FDMA satellite terminal of the FDMA integrated services network via the voice gateway equipment;

[0024] Step 8.2: The automatic telephone network converts the off-hook information into call response signaling and sends it to the FDMA channel equipment of the FDMA integrated services network via the voice gateway equipment. The FDMA channel equipment parses the call response and sends the off-hook frame to the FDMA satellite terminal.

[0025] Step 8.3: The telephones of the automatic telephone network and the FDMA satellite terminals of the FDMA network begin voice communication;

[0026] Step 8.4: After receiving the voice signal, the service access unit of the voice gateway device samples and quantizes the analog voice signal and then hands it over to the media resource processing module of the service switching unit for encoding, decoding and switching.

[0027] Step 8.5: The service switching unit converts and exchanges different types of voice packets and IP-based voice data to achieve voice interconnection and interoperability between different satellite network systems.

[0028] A voice gateway device and a cross-network service communication system are disclosed. The system includes an FDMA integrated service network, a voice gateway device, and an automatic telephone network. The FDMA integrated service network includes FDMA satellite terminals and FDMA channel terminals. The automatic telephone network includes a program-controlled exchange and telephones. The voice gateway device includes a service access unit, a service switching unit, a channel adaptation unit, and a management and control unit.

[0029] In the FDMA integrated services network, the FDMA satellite terminal initiates a call request to the voice gateway device, carrying channel and key allocation information;

[0030] When the service access unit of the voice gateway device receives a call request, it connects with the two- or four-line interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the analog user's call control signaling, and then hands it over to the call session control module of the service switching unit for unified call control.

[0031] Upon receiving the call control signaling, the service switching unit sends the session establishment request information to the channel adaptation unit;

[0032] After receiving the session establishment request information, the channel adaptation unit triggers the request for channel resources. Based on the service attributes and resource requirements, the channel adaptation unit queries the list of available channels and selects an available channel to return to the service switching unit.

[0033] The service switching unit replies to the service access unit with a call response, carrying the target channel addressing information. The service access unit obtains the status of the connected channel and completes the channel selection required for the call.

[0034] The service access unit initiates a call request to the target network automatic telephone network and sends it to the program-controlled exchange of the automatic telephone network;

[0035] The automated telephone network's program-controlled exchange converts digital signals into telephone signals. After passing through the signaling process within the automated telephone network, the call request is sent to the automated telephone network's telephone.

[0036] When a telephone in an automatic telephone network receives a call request, it rings and sends the ringing signal and the off-hook signal to the other end terminal.

[0037] Furthermore, after receiving the session establishment request information, the channel adaptation unit extracts the terminal channel ID, service type, and bandwidth requirement information, searches the service status information table, and if a matching information is found, it notifies the service switching unit that a duplicate link establishment has occurred; otherwise, it generates a new service status table entry and triggers a satellite channel application. Based on the application result, it notifies the service switching unit to allow or deny service access.

[0038] Furthermore, upon receiving a call request, the telephone in the automatic telephone network rings and sends the ringing signal and off-hook signal to the other end terminal, as follows:

[0039] When a telephone in the automatic telephone network receives a call request, it rings and sends the ringing signal from the automatic telephone network to the FDMA satellite terminal of the FDMA integrated services network via the voice gateway equipment.

[0040] The automatic telephone network converts off-hook information into call response signaling and sends it to the FDMA channel equipment of the FDMA integrated services network via the voice gateway equipment. The FDMA channel equipment parses the call response and sends the off-hook frame to the FDMA satellite terminal.

[0041] The telephones of the automatic telephone network and the FDMA satellite terminals of the FDMA network began voice communication;

[0042] After receiving the voice signal, the service access unit of the voice gateway device samples and quantizes the analog voice, and then hands it over to the media resource processing module of the service switching unit for encoding, decoding and switching.

[0043] The service switching unit converts and exchanges different types of voice packets and IP-based voice data to achieve voice interconnection and interoperability between different satellite network systems.

[0044] Compared with the prior art, the present invention has the following significant advantages: (1) It realizes the interconnection and interoperability of analog voice services between different network systems such as broadband satellite communication network, TDMA integrated service network, FDMA integrated service network, and Tiantong satellite communication network, as well as the interconnection and interoperability of analog voice services between satellite communication network system and terrestrial automatic telephone network; (2) It has signaling and media conversion functions, supports the conversion between No. 7 signaling, No. 1 signaling and SIP signaling; and supports the conversion of voice coding formats such as G.711 (64kbps), G.729A (8kbps), G.729B (8kbps), and AHELP (0.6kbps, 1.2kbps, 2.4kbps). Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the structure of a voice gateway device according to the present invention.

[0046] Figure 2 This is a flowchart illustrating a cross-network service communication method based on a voice gateway device according to the present invention. Detailed Implementation

[0047] The present invention also provides a voice gateway device, including a channel adaptation unit, a service access unit, a service switching unit, and a management and control unit;

[0048] The channel adaptation unit is used for the connection between the FDMA integrated service network channel and the terrestrial automatic telephone network, and completes the monitoring, selection and control of each channel resource. At the same time, it provides an interface in the voice gateway device to the service access unit and the service switching unit, providing channel information and controlling the channel.

[0049] The service access unit interfaces with the two- or four-line interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the analog user's call control signaling, and then hands it over to the call session control module of the service switching unit for unified call control.

[0050] The service switching unit provides a voice interface with the automatic telephone network, converts and exchanges different types of voice packets, and enables voice interoperability between different satellite network systems and terrestrial automatic telephone network systems;

[0051] The management and control unit is used to manage and control the channel adaptation unit, service access unit, and service switching unit.

[0052] The present invention also provides a cross-network service communication method based on the voice gateway device, comprising the following steps:

[0053] Step 1: The FDMA satellite terminal in the FDMA integrated services network initiates a call request to the voice gateway device, carrying channel and key allocation information;

[0054] Step 2: The service access unit of the voice gateway device receives the call request, connects with the two- or four-line interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the analog user's call control signaling, and then hands it over to the call session control module of the service switching unit for unified call control.

[0055] Step 3: The service switching unit receives the call control signaling and sends the session establishment request information to the channel adaptation unit;

[0056] Step 4: After receiving the session establishment request information, the channel adaptation unit triggers the application for channel resources. Based on the service attributes and resource requirements, the channel adaptation unit queries the list of available channels and selects an available channel to return to the service switching unit.

[0057] Step 5: The service switching unit replies to the service access unit with the call response, carrying the target channel addressing information. The service access unit obtains the status of the connected channel and completes the channel selection required for the call.

[0058] Step 6: The service access unit initiates a call request to the target network automatic telephone network and sends it to the program-controlled exchange of the automatic telephone network;

[0059] Step 7: The automated telephone network's program-controlled exchange converts the digital signal into a telephone signal. After the signaling process within the automated telephone network, the call request is sent to the automated telephone network's telephone.

[0060] Step 8: After receiving a call request, the telephone in the automatic telephone network rings and sends the ringing signal and off-hook signal to the other end terminal.

[0061] As a specific example, in step 4, after receiving the session establishment request information, the channel adaptation unit triggers the request for channel resources. Based on the service attributes and resource requirements, the channel adaptation unit queries the list of available channels and selects an available channel to return to the service switching unit, as detailed below:

[0062] After receiving the session establishment request information, the channel adaptation unit extracts the terminal channel ID, service type, and bandwidth requirement information, searches the service status information table, and if a matching information is found, it notifies the service switching unit that a duplicate connection has occurred; otherwise, it generates a new service status table entry and triggers a satellite channel application. Based on the application result, it notifies the service switching unit to allow or deny service access.

[0063] As a specific example, in step 8, after receiving a call request, the telephone in the automatic telephone network rings and sends the ringing signal and the off-hook signal to the other end terminal, as follows:

[0064] Step 8.1: After receiving a call request, the telephone in the automatic telephone network rings and sends the ringing signal from the automatic telephone network to the FDMA satellite terminal of the FDMA integrated services network via the voice gateway equipment;

[0065] Step 8.2: The automatic telephone network converts the off-hook information into call response signaling and sends it to the FDMA channel equipment of the FDMA integrated services network via the voice gateway equipment. The FDMA channel equipment parses the call response and sends the off-hook frame to the FDMA satellite terminal.

[0066] Step 8.3: The telephones of the automatic telephone network and the FDMA satellite terminals of the FDMA network begin voice communication;

[0067] Step 8.4: After receiving the voice signal, the service access unit of the voice gateway device samples and quantizes the analog voice signal and then hands it over to the media resource processing module of the service switching unit for encoding, decoding and switching.

[0068] Step 8.5: The service switching unit converts and exchanges different types of voice packets and IP-based voice data to achieve voice interconnection and interoperability between different satellite network systems.

[0069] This invention also provides a voice gateway device and a cross-network service communication system. The system includes an FDMA integrated service network, a voice gateway device, and an automatic telephone network. The FDMA integrated service network includes FDMA satellite terminals and FDMA channel terminals. The automatic telephone network includes a program-controlled exchange and telephones. The voice gateway device includes a service access unit, a service switching unit, a channel adaptation unit, and a management and control unit.

[0070] In the FDMA integrated services network, the FDMA satellite terminal initiates a call request to the voice gateway device, carrying channel and key allocation information;

[0071] When the service access unit of the voice gateway device receives a call request, it connects with the two- or four-line interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the analog user's call control signaling, and then hands it over to the call session control module of the service switching unit for unified call control.

[0072] Upon receiving the call control signaling, the service switching unit sends the session establishment request information to the channel adaptation unit;

[0073] After receiving the session establishment request information, the channel adaptation unit triggers the request for channel resources. Based on the service attributes and resource requirements, the channel adaptation unit queries the list of available channels and selects an available channel to return to the service switching unit.

[0074] The service switching unit replies to the service access unit with a call response, carrying the target channel addressing information. The service access unit obtains the status of the connected channel and completes the channel selection required for the call.

[0075] The service access unit initiates a call request to the target network automatic telephone network and sends it to the program-controlled exchange of the automatic telephone network;

[0076] The automated telephone network's program-controlled exchange converts digital signals into telephone signals. After passing through the signaling process within the automated telephone network, the call request is sent to the automated telephone network's telephone.

[0077] When a telephone in an automatic telephone network receives a call request, it rings and sends the ringing signal and the off-hook signal to the other end terminal.

[0078] As a specific example, after receiving the session establishment request information, the channel adaptation unit extracts the terminal channel ID, service type, and bandwidth requirement information, searches the service status information table, and if a matching information is found, it notifies the service switching unit that a duplicate connection has occurred; otherwise, it generates a new service status table entry and triggers a satellite channel application. Based on the application result, it notifies the service switching unit to allow or deny service access.

[0079] As a specific example, after receiving a call request, the telephone in an automatic telephone network rings and sends the ringing signal and the off-hook signal to the other end terminal, as follows:

[0080] When a telephone in the automatic telephone network receives a call request, it rings and sends the ringing signal from the automatic telephone network to the FDMA satellite terminal of the FDMA integrated services network via the voice gateway equipment.

[0081] The automatic telephone network converts off-hook information into call response signaling and sends it to the FDMA channel equipment of the FDMA integrated services network via the voice gateway equipment. The FDMA channel equipment parses the call response and sends the off-hook frame to the FDMA satellite terminal.

[0082] The telephones of the automatic telephone network and the FDMA satellite terminals of the FDMA network began voice communication;

[0083] After receiving the voice signal, the service access unit of the voice gateway device samples and quantizes the analog voice, and then hands it over to the media resource processing module of the service switching unit for encoding, decoding and switching.

[0084] The service switching unit converts and exchanges different types of voice packets and IP-based voice data to achieve voice interconnection and interoperability between different satellite network systems.

[0085] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0086] Example

[0087] like Figure 1 As shown, the present invention provides a voice gateway device, including a channel adaptation unit, a service access unit, a service switching unit, and a management and control unit.

[0088] The channel adaptation unit is used for the connection between the FDMA integrated service network channel and the terrestrial automatic telephone network, and completes the monitoring, selection and control of each channel resource. At the same time, it provides an interface in the voice gateway device to the service access unit and the service switching unit, providing channel information and controlling the channel.

[0089] The service access unit interfaces with the two- or four-line interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the analog user's call control signaling, and then hands it over to the call session control module of the service switching unit for unified call control.

[0090] The service switching unit provides a voice interface with the automatic telephone network, converts and exchanges different types of voice packets, and enables voice interoperability between different satellite network systems and terrestrial automatic telephone network systems;

[0091] The management and control unit is used to manage and control the channel adaptation unit, service access unit, and service switching unit.

[0092] like Figure 2 As shown, a cross-network service communication method based on a voice gateway device includes the following steps:

[0093] Step 1: The FDMA satellite terminal in the FDMA integrated services network initiates a call request to the voice gateway device, carrying channel and key allocation information;

[0094] Step 2: The service access unit of the voice gateway device receives the call request, connects with the two- or four-line interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the analog user's call control signaling, and then hands it over to the call session control module of the service switching unit for unified call control.

[0095] Step 3: The service switching unit receives the call control signaling and sends the session establishment request information to the channel adaptation unit;

[0096] Step 4: After receiving the session establishment request information, the channel adaptation unit triggers the application for channel resources. Based on the service attributes and resource requirements, the channel adaptation unit queries the list of available channels and selects an available channel to return to the service switching unit.

[0097] Step 5: The service switching unit replies to the service access unit with the call response, carrying the target channel addressing information. The service access unit obtains the status of the connected channel and completes the channel selection required for the call.

[0098] Step 6: The service access unit initiates a call request to the target network automatic telephone network and sends it to the program-controlled exchange of the automatic telephone network;

[0099] Step 7: The automated telephone network's program-controlled exchange converts the digital signal into a telephone signal. After the signaling process within the automated telephone network, the call request is sent to the automated telephone network's telephone.

[0100] Step 8: After receiving a call request, the telephone in the automatic telephone network rings and sends the ringing signal and off-hook signal to the other end terminal.

[0101] As a specific example, after receiving the session establishment request information, the channel adaptation unit in step 4 triggers the request for channel resources. Based on service attributes and resource requirements, the channel adaptation unit queries the list of available channels and selects an available channel to return to the service switching unit, as detailed below:

[0102] After receiving the session establishment request information, the channel adaptation unit extracts the terminal channel ID, service type, and bandwidth requirement information, searches the service status information table, and if a matching information is found, it notifies the service switching unit that a duplicate connection has occurred; otherwise, it generates a new service status table entry and triggers a satellite channel application. Based on the application result, it notifies the service switching unit to allow or deny service access.

[0103] As a specific example, after receiving a call request, the telephone in the automatic telephone network described in step 8 rings and sends the ringing signal and the off-hook signal to the other end terminal, as follows:

[0104] Step 8.1: After receiving a call request, the telephone in the automatic telephone network rings and sends the ringing signal from the automatic telephone network to the FDMA satellite terminal of the FDMA integrated services network via the voice gateway equipment;

[0105] Step 8.2: The automatic telephone network converts the off-hook information into call response signaling and sends it to the FDMA channel equipment of the FDMA integrated services network via the voice gateway equipment. The FDMA channel equipment parses the call response and sends the off-hook frame to the FDMA satellite terminal.

[0106] Step 8.3: The telephones of the automatic telephone network and the FDMA satellite terminals of the FDMA network begin voice communication;

[0107] Step 8.4: After receiving the voice signal, the service access unit of the voice gateway device samples and quantizes the analog voice signal and then hands it over to the media resource processing module of the service switching unit for encoding, decoding and switching.

[0108] Step 8.5: The service switching unit converts and exchanges different types of voice packets and IP-based voice data to achieve voice interconnection and interoperability between different satellite network systems.

[0109] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A voice gateway device, characterized in that: It includes a channel adaptation unit, a service access unit, a service switching unit and a management control unit; The channel adapter unit is used for connecting the FDMA integrated service network channel with the ground automatic telephone network, completing the monitoring, selection and control of each channel resource, and providing an interface to the service access unit and the service switching unit in the voice gateway device, providing channel information and controlling the channel; The service access unit is connected to the two-wire and four-wire interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the call control signaling of the analog user, and then hands it over to the call session control module of the service switching unit for unified call control; The service switching unit provides a voice interface with the automatic telephone network, converts and exchanges different types of voice packets, and realizes voice intercommunication between different satellite networks and ground automatic telephone networks; The management and control unit is used to manage and control the channel adaptation unit, the service access unit and the service switching unit.

2. A cross-network service communication method based on the voice gateway device of claim 1, characterized in that: The following steps are involved: Step 1: The FDMA satellite terminal in the FDMA integrated service network initiates a call request to the voice gateway device, carrying channel and key allocation information; Step 2: The service access unit of the voice gateway device receives the call request, connects to the two-wire or four-wire interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the call control signaling of the analog user, and then hands it over to the call session control module of the service switching unit for unified call control; Step 3: The service switching unit receives the call control signaling and sends the session establishment request information to the channel adaptation unit; Step 4: After receiving the session establishment request information, the channel adaptation unit triggers the application for channel resources. The channel adaptation unit queries the available channel list according to the service attributes and resource demand information, and selects an available channel from the list and returns it to the service switching unit. Step 5: The service switching unit replies a call response to the service access unit, carrying the target channel addressing information. The service access unit obtains the status of the connected channel and completes the channel selection required for the call. Step 6: The service access unit initiates a call request to the target network automatic telephone network and sends it to the program-controlled switch of the automatic telephone network; Step 7: The program-controlled switch of the automatic telephone network converts the digital signal into a telephone signal, and after the signaling process inside the automatic telephone network, sends the call request to the telephone of the automatic telephone network; Step 8: After receiving the call request, the telephone in the automatic telephone network rings and sends the ringing signal and off-hook signal to the opposite terminal.

3. The cross-network service communication method based on voice gateway equipment according to claim 2 is characterized in that: After the channel adaptation unit receives the session establishment request information in step 4, it triggers the application for channel resources. The channel adaptation unit queries the available channel list according to the service attributes and resource demand information, and selects an available channel from it and returns it to the service switching unit, as follows: After receiving the session establishment request information, the channel adaptation unit extracts the terminal channel ID, service type, and bandwidth requirement information, searches the service status information table, and if matching information is found, notifies the service switching unit that duplicate link establishment has occurred; Otherwise, a new service status table entry is generated and the application for a satellite channel is triggered. According to the application result, the service switching unit is notified to allow or deny service access.

4. The cross-network service communication method based on voice gateway equipment according to claim 2, characterized in that: In step 8, the telephone of the automatic telephone network rings after receiving the call request, and sends the ringing signal and the off-hook signal to the opposite terminal, as follows: Step 8.1, the telephone of the automatic telephone network rings after receiving the call request, and the ringing signal is sent from the automatic telephone network to the FDMA satellite terminal of the FDMA integrated service network via the voice gateway device; Step 8.2, the automatic telephone network converts the off-hook information into a call answering signaling and sends it to the FDMA channel device of the FDMA integrated service network via the voice gateway device. The FDMA channel device analyzes the call answering and sends the off-hook frame to the FDMA satellite terminal; Step 8.3, the telephone of the automatic telephone network and the FDMA satellite terminal of the FDMA network start voice communication; Step 8.4: After receiving the voice signal, the service access unit of the voice gateway device samples and quantizes the analog voice and then sends it to the media resource processing module of the service switching unit for encoding, decoding and switching; Step 8.5: The service exchange unit converts and exchanges different types of voice packets and IP-based voice data to achieve voice interconnection between different satellite networks.

5. A voice gateway device and an inter-network service communication system, characterized in that: The system includes an FDMA integrated service network, a voice gateway device, and an automatic telephone network. The FDMA integrated service network includes an FDMA satellite terminal and an FDMA channel terminal. The automatic telephone network includes a program-controlled exchange and a telephone. The voice gateway device includes a service access unit, a service switching unit, a channel adaptation unit, and a management control unit, wherein: The FDMA satellite terminal in the FDMA integrated service network initiates a call request to the voice gateway device, carrying the channel and key allocation information; The service access unit of the voice gateway equipment receives the call request, connects with the two-wire and four-wire interface provided by the FDMA channel terminal, adapts the analog telephone user line signaling, normalizes the call control signaling of the analog user, and then hands it over to the call session control module of the service switching unit for unified call control; The service switching unit receives the call control signaling and sends the session establishment request information to the channel adaptation unit; After receiving the session establishment request information, the channel adaptation unit triggers the application for channel resources. The channel adaptation unit queries the available channel list according to the service attributes and resource demand information, and selects an available channel from the list and returns it to the service switching unit. The service switching unit replies a call response to the service access unit, carrying the target channel addressing information. The service access unit obtains the status of the connected channel and completes the channel selection required for the call. The service access unit initiates a call request to the target network automatic telephone network and sends it to the program-controlled switch of the automatic telephone network; The program-controlled exchange of the automatic telephone network converts the digital signal into a telephone signal, and after the signaling process inside the automatic telephone network, sends the call request to the telephone of the automatic telephone network; The telephone in the automatic telephone network rings after receiving a call request, and sends the ringing signal and off-hook signal to the other terminal.

6. The voice gateway device and inter-network service communication system according to claim 5, characterized in that: After receiving the session establishment request information, the channel adaptation unit extracts the terminal channel ID, service type, and bandwidth requirement information, searches the service status information table, and if matching information is found, notifies the service switching unit that duplicate link establishment has occurred; Otherwise, a new service status table entry is generated and the application for a satellite channel is triggered. According to the application result, the service switching unit is notified to allow or deny service access.

7. The voice gateway device and inter-network service communication system according to claim 5, characterized in that: After receiving the call request, the telephone in the automatic telephone network rings and sends the ringing signal and off-hook signal to the other terminal, as follows: After receiving the call request, the telephone of the automatic telephone network rings, and the ringing signal is sent from the automatic telephone network to the FDMA satellite terminal of the FDMA integrated service network via the voice gateway equipment; The automatic telephone network converts the off-hook information into a call answer signaling and sends it to the FDMA channel equipment of the FDMA integrated service network through the voice gateway equipment. The FDMA channel equipment analyzes the call answer and sends the off-hook frame to the FDMA satellite terminal. The telephone of the automatic telephone network starts voice communication with the FDMA satellite terminal of the FDMA network; After receiving the voice signal, the service access unit of the voice gateway device samples and quantizes the analog voice and then hands it over to the media resource processing module of the service switching unit for encoding, decoding and switching; The service exchange unit converts and exchanges different types of voice packets and IP-based voice data to achieve voice interconnection between different satellite networks.

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