CN102480439B - Gateway equipment, system and method for implementing butt joint of trunks - Google Patents
Gateway equipment, system and method for implementing butt joint of trunks Download PDFInfo
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- CN102480439B CN102480439B CN201010567523.6A CN201010567523A CN102480439B CN 102480439 B CN102480439 B CN 102480439B CN 201010567523 A CN201010567523 A CN 201010567523A CN 102480439 B CN102480439 B CN 102480439B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1033—Signalling gateways
- H04L65/104—Signalling gateways in the network
Abstract
The invention discloses gateway equipment, a system and a method for implementing butt joint of trunks. The system comprises soft switching equipment, the gateway equipment and butt joint equipment, wherein the soft switching equipment is used for realizing corresponding service through signaling interaction with the gateway equipment; the gateway equipment is used for allocating time slot resources to signaling of different standards, encoding interoffice signaling forwarded by the soft switching equipment into standard signaling according to managed butt joint equipment information, and transmitting the standard signaling to the corresponding butt joint equipment according to an appointed time slot; and the butt joint equipment is used for receiving the corresponding standard signaling from the gateway equipment in the appointed time slot according to the time slot resource allocation information of the butt joint equipment managed by the gateway equipment. By the gateway equipment, the system and the method, different time slot resources are allocated to any standard signaling of an E1/T1 trunk, and a networking requirement that one trunk supports various types of standard channel associated signaling is met; therefore, finite trunk resources of the E1/T1 are used effectively.
Description
Technical field
The present invention relates to public switch telephone network (PSTN, Public Switched Telephone Network) and next generation network (NGN, Next Generation Network) gateway device, particularly relate to the gateway device, the system and method that realize trunk (TRUNK) and dock.
Background technology
T1 and E1 is physical connection interface different in digital network respectively, and its link can adopt coaxial cable also can adopt optical fiber.Wherein T1 is Unite States Standard, and bandwidth is 1.544Mbps; E1 is European standard, and bandwidth is 2.048Mbps; That the special line of China generally adopts is all E1.
The voice digital signal transmitted in E1/T1 adopts pulse code modulation (PCM, Pulse CodeModulation).For single channel PCM, system sampling frequency is 8000HZ, and sampling interval duration is 128 μ s; This sampling interval duration is divided into multiple time slot (TS, Time Slot), with the distribution of the time of carrying out.The sampling interval of E1 is divided into 32 time slots, and the sampling interval of T1 is divided into 24 time slots.
The digital repeatered line of E1/T1 is supported the channel associated signalling adopting multiple standards, and often kind of signaling standard all disunities.As Q.400-Q.490 RITU-T standard defines R2 signaling standard.There is signaling standard implementation voluntarily different countries and regions, and there is No1 signaling standard in such as China, and there are R2 signaling standard in Europe, Latin America and some developing countries as Brazilian, Argentinian etc.; Further, each country, because of the equipment disunity adopted, also also exists skimble-scamble standard.
Current relay resource manages in units of basic group, and namely the E1/T1 Interface of a primary rate can only support a kind of channel associated signalling of standard.Some international channel associated signallings are had to the situation of multiple branch, then need to take multiple E1 interface to satisfy the demands, and the traffic carrying capacity that these international channel associated signallings carry is less, this reduces the customer volume of wall scroll E1 interface, cannot meet to support when relay resource is limited multiple accurate thus make full use of the demand of relay resource with road sign.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of gateway device, the system and method that realize trunk docking, and limited relay resource can be utilized to support, and the trunk of multiple signaling standard docks.
In order to solve the problems of the technologies described above, the invention provides a kind of system realizing trunk docking, comprising Softswitch, gateway device and one or more the service of connection devices, wherein:
Softswitch, for realizing corresponding business by carrying out Signalling exchange to gateway device;
Gateway device, for the signal deployment time interval resource for various criterion; The interoffice signaling that Softswitch forwards is encoded into standard signaling by the service of connection devices information according to management, and gives corresponding the service of connection devices by the slot transmission of specifying;
The service of connection devices, for the time interval resource configuration information of this equipment managed according to gateway device, receives the signaling of respective standard at the time slot of specifying from gateway device.
Further,
The service of connection devices also sends the signaling of respective standard at the time slot of specifying to gateway device;
The business information decoded also according to the standard signaling decoding that the service of connection devices information will receive from the service of connection devices at the time slot of specifying, and is sent to Softswitch by gateway device.
Further,
Part or all of information in the time-gap number that the service of connection devices information of gateway device management comprises all signaling standards of the identification code of the service of connection devices, the service of connection devices and correspondence thereof and the relaying group serial number information that is assigned with;
The service of connection devices by inputting the identification code of this equipment on the administration interface of this device end, obtain the time interval resource configuration information of this equipment, the part or all of information in the time-gap number comprising all signaling standards of this equipment and correspondence thereof and the relaying group serial number information be assigned with.
Further, gateway device comprises the relay resource administration module, message control module and the signaling coding/decoding module that connect successively, wherein:
Relay resource administration module, for the signal deployment time interval resource for various criterion, and by adding, changing and deletion action management the service of connection devices information; By the service of connection devices information transmission of management to signaling coding/decoding module;
Signaling coding/decoding module, for according to the time slot of being specified by time-gap number in the service of connection devices information, is decoded business information by the standard signaling of the service of connection devices received by trunk by corresponding signaling standard, and reports message control module; Or the business information to be passed down by message control module is encoded into corresponding standard signaling by corresponding signaling standard, and send to the service of connection devices by trunk;
Message control module, sends to Softswitch for the business information reported by signaling coding/decoding module; Or the business information interoffice signaling that Softswitch forwards analyzed by corresponding signaling standard in this signaling, and process accordingly according to the business information analyzed, pass to signaling coding/decoding module by under this business information simultaneously.
Further,
If it is off-hook information that message control module is analyzed in described interoffice signaling, then application takies relay resource preparation Call-Control1 and by corresponding signaling standard switch call state, waits the business information of next interoffice signaling to be analyzed.
Inscribing to solve between above-mentioned technology, the invention provides a kind of gateway device realizing trunk docking, comprising the relay resource administration module, message control module and the signaling coding/decoding module that connect successively, wherein:
Relay resource administration module, for the signal deployment time interval resource for various criterion, and manages the service of connection devices information; By the described the service of connection devices information transmission of management to signaling coding/decoding module;
Signaling coding/decoding module, for according to the time slot of specifying in the service of connection devices information, decodes business information by the standard signaling received from the service of connection devices by corresponding signaling standard, and reports message control module;
Message control module, sends to Softswitch for the business information reported by signaling coding/decoding module.
Further,
The interoffice signaling that Softswitch also forwards by message control module by corresponding signaling standard analysis business information wherein, and processes accordingly according to the business information analyzed, and passes to signaling coding/decoding module by under this business information simultaneously;
The business information that message control module also passes down by signaling coding/decoding module is encoded into corresponding standard signaling by signaling standard corresponding in the service of connection devices information, and sends to the service of connection devices according to the time slot of specifying in the service of connection devices information.
Further,
Part or all of information in the time-gap number that the service of connection devices information of relay resource administration module management comprises all signaling standards of the identification code of the service of connection devices, the service of connection devices and correspondence thereof and the relaying group serial number information that is assigned with; By adding, changing and deletion action management the service of connection devices information;
The standard signaling of the service of connection devices received by trunk, according to the time slot of being specified by described time-gap number in the service of connection devices information, is decoded business information by corresponding signaling standard, and reports message control module by signaling coding/decoding module; Or the business information to be passed down by message control module is encoded into corresponding standard signaling by corresponding signaling standard, and send to the service of connection devices by trunk;
If it is off-hook information that message control module is analyzed in described interoffice signaling, then application takies relay resource preparation Call-Control1 and by corresponding signaling standard switch call state, waits the business information of next interoffice signaling to be analyzed.
In order to solve the problems of the technologies described above, the invention provides a kind of method realizing trunk docking, relate to gateway device and one or more the service of connection devices, the method comprises:
Gateway device is the signal deployment time interval resource of the service of connection devices information various criterion, and manages the service of connection devices information;
The time interval resource configuration information of this equipment that the service of connection devices manages according to gateway device, sends the signaling of respective standard at the time slot of specifying to described gateway device;
The standard signaling decoding that gateway device will receive from the service of connection devices at the time slot of specifying according to the service of connection devices information of management, and the business information decoded is sent to Softswitch.
Further, the method also comprises:
The interoffice signaling received from Softswitch is encoded into standard signaling according to the service of connection devices information by gateway device, and gives corresponding the service of connection devices by the slot transmission of specifying;
The service of connection devices, according to the time interval resource configuration information of this equipment, receives the signaling of respective standard at the time slot of specifying from gateway device.
Further,
Part or all of information in the time-gap number that the service of connection devices information of gateway device management comprises all signaling standards of the identification code of described the service of connection devices, the service of connection devices and correspondence thereof and the relaying group serial number information that is assigned with;
The service of connection devices by inputting the identification code of this equipment on the administration interface of this device end, obtain the time interval resource configuration information of this equipment, the part or all of information in the time-gap number comprising all signaling standards of this equipment and correspondence thereof and the relaying group serial number information be assigned with.
In order to solve the problems of the technologies described above, the invention provides a kind of method realizing trunk docking, relate to gateway device and one or more the service of connection devices, the method comprises:
Gateway device is the signal deployment time interval resource of the service of connection devices information various criterion, and manages the service of connection devices information;
The time interval resource configuration information of this equipment that the service of connection devices manages according to gateway device, sends the signaling of respective standard at the time slot of specifying to gateway device;
The standard signaling decoding that gateway device will receive from the service of connection devices at the time slot of specifying according to the service of connection devices information of management, and the business information decoded is sent to Softswitch.
Further, the method also comprises:
The interoffice signaling received from Softswitch is encoded into standard signaling according to the service of connection devices information by gateway device, and gives corresponding the service of connection devices by the slot transmission of specifying;
The service of connection devices, according to the time interval resource configuration information of this equipment, receives the signaling of respective standard at the time slot of specifying from gateway device.
Further,
Part or all of information in the time-gap number that the service of connection devices information of gateway device management comprises all signaling standards of the identification code of the service of connection devices, the service of connection devices and correspondence thereof and the relaying group serial number information that is assigned with;
The service of connection devices by inputting the identification code of this equipment on the administration interface of this device end, obtain the time interval resource configuration information of this equipment, the part or all of information in the time-gap number comprising all signaling standards of this equipment and correspondence thereof and the relaying group serial number information be assigned with.
Gateway device provided by the invention, system and method, for the channel associated signalling of standard arbitrary on E1/T1 trunk configures and manages different time interval resources, meet the networking requirement that trunk supports multiple standards channel associated signalling, thus fully, efficiently utilize the relay resource of E1/T1 digital Finite.
Accompanying drawing explanation
Fig. 1 is the gateway device embodiment and the structural representation of system embodiment that realize trunk docking of the present invention;
Fig. 2 is the flow chart realizing the embodiment of the method for trunk docking of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, technical scheme of the present invention is set forth in detail.The embodiment below exemplified only for instruction and explanation of the present invention, and does not form the restriction to technical solution of the present invention.
As shown in Figure 1, be the structure realizing the system embodiment of trunk docking provided by the invention, this system comprises gateway device, one or more the service of connection devices and Softswitch, wherein:
Softswitch, for realizing corresponding business by carrying out Signalling exchange to gateway device;
Gateway device, for configuring time interval resource according to different signaling standard, and being encoded into standard signaling according to the service of connection devices information of management by the interoffice signaling that Softswitch forwards, giving corresponding the service of connection devices by the slot transmission of specifying; Maybe the time slot by configuration is received corresponding standard signaling decoding from the service of connection devices, the business information decoded is sent to Softswitch;
Part or all of information in the time-gap number that the service of connection devices information of gateway device management comprises all signaling standards of the identification code of the service of connection devices, this service of connection devices and correspondence thereof and the relaying group sequence number that is assigned with.
The service of connection devices, for sending the signaling of respective standard on the time slot of specifying to gateway device according to the management information obtained from gateway device, or receives the signaling of respective standard from gateway device;
The service of connection devices obtains gateway device by the identification code inputting this equipment on the administration interface of terminal and configures to the time interval resource configuration information of this equipment, the part or all of information in the time-gap number comprising all signaling standards of this equipment and correspondence thereof and the relaying group sequence number be assigned with.
As can be seen from Figure 1, gateway device comprises the relay resource administration module, message control module and the signaling coding/decoding module that connect successively further, wherein:
Relay resource administration module, for the signal deployment time interval resource for various criterion, and manages all the service of connection devices information by interpolation, change and deletion action; By the service of connection devices information transmission of management to signaling coding/decoding module;
Signaling coding/decoding module, for according to the time slot of specifying in the service of connection devices information, is decoded business information by the signaling of the service of connection devices received by trunk by the signaling standard in the service of connection devices information, and reports message control module; Or the business information to be passed down by message control module is encoded into corresponding signaling by the signaling standard in the service of connection devices information, and send to the service of connection devices by trunk;
Message control module, sends to Softswitch for the business information reported by signaling coding/decoding module; Or the business information interoffice signaling that Softswitch forwards analyzed by corresponding signaling standard in this signaling, and process accordingly according to the business information analyzed, pass to signaling coding/decoding module by under this business information simultaneously.
Message control module is by sending to Softswitch to start to control call flow the business information of decoding.
If it is off-hook information that message control module is analyzed in interoffice signaling, then application takies relay resource preparation Call-Control1 and (comprises Idle state by corresponding signaling standard switch call state, Deng number state, the call flow states such as conversation state), wait the business information (such as the information such as off-hook response message or on-hook) of next interoffice signaling to be analyzed.
As shown in Figure 2, be the embodiment of the method flow process that gateway device provided by the present invention realizes trunk docking, comprise the steps:
Step 210: according to different signaling standard configuration time interval resource, and manage the service of connection devices information;
Part or all of information in the time-gap number that the service of connection devices information of management comprises all signaling standards of the identification code of the service of connection devices, this service of connection devices and correspondence thereof and the relaying group sequence number that is assigned with.
Step 220: the interoffice signaling receiving Softswitch forwarding by the time slot of specifying, and process accordingly according to the business information therefrom analyzed;
If it is off-hook information that gateway device is analyzed in interoffice signaling, then application takies relay resource preparation Call-Control1 and (comprises Idle state by corresponding signaling standard switch call state, Deng number state, the call flow states such as conversation state), wait the business information (such as the information such as off-hook response message or on-hook) of next interoffice signaling to be analyzed.
Step 230: the business information of analysis is encoded into standard signaling by the service of connection devices information according to management, sends to corresponding the service of connection devices by the time slot of specifying by trunk;
According to signaling standard corresponding in the service of connection devices information, the business information of analysis is encoded into standard signaling.
Step 240: by the time slot of specifying from the corresponding standard signaling of relaying line receiver the service of connection devices, and become business information according to the service of connection devices information decoding, send to Softswitch.
The service of connection devices, according to the time interval resource configuration information known, sends the signaling of respective standard at the time slot of specifying to gateway device; Gateway device is according to the standard signaling decoding of signaling standard corresponding in the service of connection devices information to reception.
By inputting the identification code of this equipment, the service of connection devices knows that gateway device configures to the time interval resource configuration information of this equipment, the part or all of information in the time-gap number comprising all signaling standards of this equipment and correspondence thereof and the relaying group sequence number be assigned with.
Gateway device is by sending to Softswitch to start to control call flow the business information be decoded into.
In said method embodiment, step 240 becomes business information to send to Softswitch the standard signaling decoding received, also can receive before interoffice signaling carries out information analysis and coding in step 220,230, in fact the lower signaling of coding and decoding receive signaling and priority requirement in out-of-order.
The embodiment to sum up exemplified can be found out, the present invention by configuring and manage different time interval resources for the channel associated signalling of arbitrary standard on E1/T1 trunk, solve the problem that limited relay resource is not enough to support multiple channel associated signalling specification, thus fully, efficiently utilize E1/T1 digital junction resource.
Claims (13)
1. realize a system for trunk docking, comprise Softswitch, gateway device and one or more the service of connection devices, wherein:
Softswitch, for realizing corresponding business by carrying out Signalling exchange to gateway device; Described signaling is channel associated signalling;
Gateway device, for the signal deployment time interval resource for various criterion, meets the networking requirement that a trunk supports multiple standards channel associated signalling; The interoffice signaling that Softswitch forwards is encoded into standard signaling by the service of connection devices information according to management, and gives corresponding the service of connection devices by the slot transmission of specifying;
The service of connection devices, for the time interval resource configuration information of this equipment managed according to gateway device, receives the signaling of respective standard at the time slot of specifying from gateway device.
2., according to system according to claim 1, it is characterized in that,
Described the service of connection devices also sends the signaling of respective standard at the time slot of specifying to described gateway device;
The business information decoded also according to the described standard signaling decoding that described the service of connection devices information will receive from described the service of connection devices at the time slot of specifying, and is sent to Softswitch by described gateway device.
3., according to the system described in claim 1 or 2, it is characterized in that,
Part or all of information in the time-gap number that the service of connection devices information of described gateway device management comprises all signaling standards of the identification code of described the service of connection devices, described the service of connection devices and correspondence thereof and the relaying group serial number information that is assigned with;
Described the service of connection devices by inputting the identification code of this equipment on the administration interface of this device end, obtain the time interval resource configuration information of described equipment, the part or all of information in the time-gap number comprising all signaling standards of this equipment and correspondence thereof and the relaying group serial number information be assigned with.
4. according to system according to claim 3, it is characterized in that, described gateway device comprises the relay resource administration module, message control module and the signaling coding/decoding module that connect successively, wherein:
Relay resource administration module, for the signal deployment time interval resource for various criterion, and manages described the service of connection devices information by interpolation, change and deletion action; By the described the service of connection devices information transmission of management to signaling coding/decoding module;
Signaling coding/decoding module, for according to the time slot of being specified by described time-gap number in described the service of connection devices information, the standard signaling of the described the service of connection devices received by trunk is decoded business information by corresponding signaling standard, and reports message control module; Or the business information to be passed down by message control module is encoded into corresponding standard signaling by corresponding signaling standard, and send to the service of connection devices by trunk;
Message control module, sends to Softswitch for the business information reported by signaling coding/decoding module; Or the business information interoffice signaling that Softswitch forwards analyzed by corresponding signaling standard in this signaling, and process accordingly according to the business information analyzed, pass to signaling coding/decoding module by under this business information simultaneously.
5., according to system according to claim 4, it is characterized in that,
If it is off-hook information that described message control module is analyzed in described interoffice signaling, then application takies relay resource preparation Call-Control1 and by corresponding signaling standard switch call state, waits the business information of next interoffice signaling to be analyzed.
6. realize a gateway device for trunk docking, comprise the relay resource administration module, message control module and the signaling coding/decoding module that connect successively, wherein:
Relay resource administration module, for the signal deployment time interval resource for various criterion, meets the networking requirement that a trunk supports multiple standards channel associated signalling, and manages the service of connection devices information; By the described the service of connection devices information transmission of management to signaling coding/decoding module; Described signaling is channel associated signalling;
Signaling coding/decoding module, for according to the time slot of specifying in described the service of connection devices information, decodes business information by the standard signaling received from the service of connection devices by corresponding signaling standard, and reports message control module;
Message control module, sends to Softswitch for the business information reported by signaling coding/decoding module.
7., according to gateway device according to claim 6, it is characterized in that,
The interoffice signaling that Softswitch also forwards by message control module by corresponding signaling standard analysis business information wherein, and processes accordingly according to the business information analyzed, and passes to signaling coding/decoding module by under this business information simultaneously;
The business information that message control module also passes down by signaling coding/decoding module is encoded into corresponding standard signaling by signaling standard corresponding in described the service of connection devices information, and sends to the service of connection devices according to the time slot of specifying in described the service of connection devices information.
8., according to gateway device according to claim 7, it is characterized in that,
Part or all of information in the time-gap number that the service of connection devices information of described relay resource administration module management comprises all signaling standards of the identification code of described the service of connection devices, described the service of connection devices and correspondence thereof and the relaying group serial number information that is assigned with; Described the service of connection devices information is managed by interpolation, change and deletion action;
Described signaling coding/decoding module is according to the time slot of being specified by described time-gap number in described the service of connection devices information, the standard signaling of the described the service of connection devices received by trunk is decoded business information by corresponding signaling standard, and reports message control module; Or the business information to be passed down by message control module is encoded into corresponding standard signaling by corresponding signaling standard, and send to the service of connection devices by trunk;
If it is off-hook information that described message control module is analyzed in described interoffice signaling, then application takies relay resource preparation Call-Control1 and by corresponding signaling standard switch call state, waits the business information of next interoffice signaling to be analyzed.
9. realize a method for trunk docking, relate to gateway device and one or more the service of connection devices, the method comprises:
Described gateway device is the signal deployment time interval resource of the service of connection devices various criterion, meets the networking requirement that a trunk supports multiple standards channel associated signalling; The interoffice signaling received from Softswitch is encoded into standard signaling by the service of connection devices information according to management, and gives corresponding the service of connection devices by the slot transmission of specifying; Described signaling is channel associated signalling;
The time interval resource configuration information of this equipment that described the service of connection devices manages according to gateway device, receives the signaling of respective standard at the time slot of specifying from gateway device.
10. in accordance with the method for claim 9, it is characterized in that, also comprise:
Described the service of connection devices, according to the time interval resource configuration information of described equipment, sends the signaling of respective standard at the time slot of specifying to described gateway device;
The described standard signaling decoding that described gateway device will receive from described the service of connection devices at the time slot of specifying according to described the service of connection devices information, and the business information decoded is sent to Softswitch.
11., according to the method described in claim 9 or 10, is characterized in that,
Part or all of information in the time-gap number that the service of connection devices information of described gateway device management comprises all signaling standards of the identification code of described the service of connection devices, described the service of connection devices and correspondence thereof and the relaying group serial number information that is assigned with;
Described the service of connection devices by inputting the identification code of this equipment on the administration interface of this device end, obtain the time interval resource configuration information of described equipment, the part or all of information in the time-gap number comprising all signaling standards of this equipment and correspondence thereof and the relaying group serial number information be assigned with.
12. 1 kinds of methods realizing trunk and dock, relate to gateway device and one or more the service of connection devices, the method comprises:
Described gateway device is the signal deployment time interval resource of the service of connection devices information various criterion, meets the networking requirement that a trunk supports multiple standards channel associated signalling, and manages the service of connection devices information; Described signaling is channel associated signalling;
The time interval resource configuration information of this equipment that described the service of connection devices manages according to gateway device, sends the signaling of respective standard at the time slot of specifying to described gateway device;
The described standard signaling decoding that described gateway device will receive from described the service of connection devices at the time slot of specifying according to the service of connection devices information of management, and the business information decoded is sent to Softswitch.
13. in accordance with the method for claim 12, it is characterized in that,
Part or all of information in the time-gap number that the service of connection devices information of described gateway device management comprises all signaling standards of the identification code of described the service of connection devices, described the service of connection devices and correspondence thereof and the relaying group serial number information that is assigned with;
Described the service of connection devices by inputting the identification code of this equipment on the administration interface of this device end, obtain the time interval resource configuration information of described equipment, the part or all of information in the time-gap number comprising all signaling standards of this equipment and correspondence thereof and the relaying group serial number information be assigned with.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010567523.6A CN102480439B (en) | 2010-11-30 | 2010-11-30 | Gateway equipment, system and method for implementing butt joint of trunks |
| PCT/CN2011/078821 WO2012071908A1 (en) | 2010-11-30 | 2011-08-24 | Gateway device, system and method for docking trunk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010567523.6A CN102480439B (en) | 2010-11-30 | 2010-11-30 | Gateway equipment, system and method for implementing butt joint of trunks |
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| CN102480439A CN102480439A (en) | 2012-05-30 |
| CN102480439B true CN102480439B (en) | 2015-06-03 |
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| CN201010567523.6A Expired - Fee Related CN102480439B (en) | 2010-11-30 | 2010-11-30 | Gateway equipment, system and method for implementing butt joint of trunks |
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| WO (1) | WO2012071908A1 (en) |
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| CN108600565B (en) * | 2018-04-24 | 2021-04-20 | 深圳震有科技股份有限公司 | Network system, method and switch for sharing SS7 signaling point by multiple PBXs |
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| Publication number | Publication date |
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| WO2012071908A1 (en) | 2012-06-07 |
| CN102480439A (en) | 2012-05-30 |
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