CN1299476C - Method for H.323 agent server to register on gatekeeper from terminals after being agent of NAT - Google Patents
Method for H.323 agent server to register on gatekeeper from terminals after being agent of NAT Download PDFInfo
- Publication number
- CN1299476C CN1299476C CNB2004100428716A CN200410042871A CN1299476C CN 1299476 C CN1299476 C CN 1299476C CN B2004100428716 A CNB2004100428716 A CN B2004100428716A CN 200410042871 A CN200410042871 A CN 200410042871A CN 1299476 C CN1299476 C CN 1299476C
- Authority
- CN
- China
- Prior art keywords
- acting server
- terminal
- private net
- gatekeeper
- message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/25—Mapping addresses of the same type
- H04L61/2503—Translation of Internet protocol [IP] addresses
- H04L61/2517—Translation of Internet protocol [IP] addresses using port numbers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
-
- 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
- H04L65/1066—Session management
- H04L65/1101—Session protocols
- H04L65/1106—Call signalling protocols; H.323 and related
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Business, Economics & Management (AREA)
- General Business, Economics & Management (AREA)
- Multimedia (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Telephonic Communication Services (AREA)
Abstract
The present invention discloses a method for H. 323 proxy servers registered on gatekeepers from terminals after being proxies of NAT. In the H. 323 protocol, the registered addresses of private network terminals adopt the express form that is IP addresses + terminal ports, different terminals are identified by adopting the form that is the same IP address + different terminal ports, the registered addresses sent out from the same H. 323 proxy server when different private network terminals pass through the same H. 323 proxy server are different, and therefore, different gatekeepers all can carry out accurate registration. The method provided by the present invention has favorable compatibility with different gatekeepers when the H. 323 proxy servers are registered on the gatekeepers after being proxies of the NAT, and the interconnection and the interoperability of systems are increased.
Description
Technical field
The present invention relates to multi-media communication, relate in particular to a kind of register method of the multimedia terminal based on agreement H.323 (being the Packet Based Network multimedia communication standard that International Telecommunications Union formulates).
Background technology
Flourish along with IP network broadband services in recent years, H.323 packet-based multimedia communications system standard extensively applies in video conference and the IP phone.Because a lot of enterprises and unit all have the local area network (LAN) of oneself, privately owned IP address has been adopted in inside, and the visit public network generally carries out address transition through NAT device.And H.323 agreement itself is not considered NAT (Network Address Translation, network address translation is divided into static NAT, three kinds of modes of pooled NAT and PAT) application, embedded characteristics in its address and NAT device have produced conflict, have produced the problem of inside and outside net interconnecting.
Current have a lot of methods can realize passing through of this NAT device, and adopting H.323, acting server is a kind of mode more completely that addresses this problem.Adopting H.323, the implementation method of acting server is: H.323 acting server is placed in the private network, on NAT device acting server H.323 being done static NAT (is that private net address and public network address are carried out man-to-man conversion, allow the method for public network visit Intranet), make outer net to visit, the terminal of Intranet is appointed as gatekeeper's (equipment of services such as address resolution and Bandwidth Management is provided for end points H.323) to acting server then, send register requirement to acting server H.323, H.323 acting server again as terminal to the public network gatekeeper registers, because H.323 acting server is modified as the IP address in the agreement H.323 the public network address of the static NAT that acting server H.323 does in advance on NAT device, the IP address of the terminal that obtains on the gatekeeper is exactly the public network address of acting server H.323.
Fig. 1 adopts the H.323 network topology structure schematic diagram of acting server.As shown in Figure 1, H.323 private net terminal 1 in the private network and private net terminal 2 all are connected on the acting server, and H.323 acting server links to each other with NAT device, and NAT device connects the gatekeeper in the public network.Adopt H.323 acting server to the gatekeeper process registration conclude and mainly contain following dual mode:
1, H.323 adopts proprietary protocol between acting server and the gatekeeper, H.323 acting server is when the registration message of receiving terminal is registered to the gatekeeper, comprise non-standard message in the registration message, the gatekeeper knows that according to non-standard message registration message sends by acting server H.323, the gatekeeper writes down this H.323 acting server terminal information of sending then, if have terminal call these through acting server terminal H.323, H.323 the gatekeeper just is directed on the acting server.
2, after H.323 acting server is received the private net terminal register requirement, the registered address in the registration message is modified as the H.323 address of acting server, to the gatekeeper registers of public network.
The 1st kind of mode that mode adopts is H.323 to contain non-standard message in the endpoint registration message, need be the gatekeeper and H.323 support non-standard message between the acting server, the shortcoming of this method is apparent: exist the interconnection and interflow problem with the gatekeeper of other producer.
The 2nd kind of mode adopted standard agreement H.323, the H.323 public network call address of acting server (IP address+port) has been adopted in the endpoint registration request of transmitting, but this logon mode causes such phenomenon, promptly all by same H.323 acting server be registered to public network gatekeeper's all corresponding same address of log-on message, will the gatekeeper support such a case like this, it is the terminal alias (terminal name) that the gatekeeper only checks registration, non-existent another name just adds a new log-on message, the terminal alias that the gatekeeper is upward different is just corresponding identical address (IP address and port) like this, but in the system of practical application, the gatekeeper of some type needs to check the registered address, if the registered address is identical, the gatekeeper just thinks identical terminal so, this gatekeeper just uses the log-on message record of newly receiving and covers original registration, and promptly the gatekeeper of some type does not support the corresponding same registered address of a plurality of terminals.This also is the problem that the second way exists in actual applications.
Summary of the invention
The present invention is exactly when overcoming that the H.323 acting server behind NAT is registered to the gatekeeper in the prior art, with the incompatible problem of dissimilar gatekeepers, proposes a kind of H.323 acting server and acts on behalf of behind the NAT terminal process registration to the gatekeeper.
The objective of the invention is in order to improve the H.323 interoperability of acting server and gatekeeper, therefore H.323 the message between acting server and the gatekeeper all adopts H.323 standard agreement, does not use non-standard message.Core concept of the present invention is: in agreement H.323, the registered address of private net terminal is to adopt the mode of (IP address+port) to represent, acting server when endpoint registration to different endpoint registration dynamic assignment listening ports, adopt (identical IP address+different port) to identify different terminals, make different terminals through same H.323 the registered address that sends out of acting server be different, strengthened intercommunication performance with different gatekeepers.
A kind of H.323 acting server is acted on behalf of behind the NAT terminal process registration to the gatekeeper, comprises the following steps:
The number of the first step, the private net terminal that will act on behalf of according to acting server H.323 defines a port pool;
Second step, do the H.323 static NAT of acting server on NAT device, the port pool that defines in the open first step allows the H.323 acting server port of intercepting of the outer terminal access of NAT device;
The 3rd the step, H.323 on the acting server port pool that defines in the first step being set, start H.323 acting server;
It is acting server that the 4th step, private net terminal are specified the gatekeeper, to acting server transmission register requirement H.323;
The 5th step, after H.323 acting server is received the register requirement of private net terminal, judge the whether for the first time registration of this terminal; If then in port pool, obtain a port that is not taken, and on this port, intercept by other terminal;
The 6th step, H.323 acting server is revised the login request message receive, the port the registered address is revised as the public network address behind the acting server static NAT H.323 and is H.323 intercepted for this terminal on the acting server sends registration message then to the gatekeeper;
The 7th step, gatekeeper authenticate after receiving the register requirement of acting server H.323, authentication is passed through, and registers for the first time if find this private net terminal, then adds the log-on message of this terminal, registered if find this private net terminal, upgraded the registration of this private net terminal; If authentication is not passed through, then forwarded for the 9th step to;
The 8th step, gatekeeper send acknowledge message to acting server H.323, and H.323 acting server is received this private net terminal information of record after the acknowledge message, and send acknowledge message to this private net terminal, and registration finishes;
The 9th step, gatekeeper send refuse information to acting server H.323, and H.323 acting server discharges the listening port that distributes for this private net terminal in the 5th step after receiving refuse information, and sends refuse information to this private net terminal, the registration end.
Port number in the above-mentioned first step middle port pond and H.323 the number of the private net terminal that will act on behalf of of acting server equate.
Private net terminal registered address in the register requirement of H.323 acting server transmission is the private net address of this terminal and a listening port on the terminal in above-mentioned the 4th step.
Said method also comprises the step of private net terminal cancel register:
Step 1, private net terminal send the message of cancel register to acting server H.323;
Step 2, H.323 acting server is released to the listening port of this terminal distribution after receiving this message, sends the message of cancel register then to the gatekeeper;
After step 3, gatekeeper receive the deregister message of acting server H.323, send cancel register to acting server H.323 and confirm;
Step 4, after H.323 acting server receives that gatekeeper's cancel register is confirmed, transmit this message to private net terminal, cancel register finishes.
Said method comprises that also the gatekeeper cancels the step of private net terminal registration:
Steps A, gatekeeper send the message of cancel register to acting server H.323;
Step B, H.323 acting server is released to the listening port that the registration terminal that is cancelled distributes after receiving this message, sends the message of cancel register then to this private net terminal;
After step C, private net terminal are received the deregister message of acting server H.323, send cancel register to acting server H.323 and confirm;
Step D, after H.323 acting server receives that the cancel register of private net terminal is confirmed, transmit this message to the gatekeeper, the gatekeeper cancels the private net terminal registration and finishes.
Technical scheme proposed by the invention is by setting up a port pool of intercepting (one section port address), adopt (identical IP address+different port) to identify different private net terminals, make different private net terminal through same H.323 the registered address that sends out of acting server be inequality, so, can carry out correct registration for dissimilar gatekeepers.The method of using the present invention to propose when the H.323 acting server behind NAT is registered to the gatekeeper, can both be carried out good compatibility, the interconnection and interflow that has improved system with dissimilar gatekeeper.
Description of drawings
Fig. 1 adopts the H.323 network topology structure schematic diagram of acting server;
Fig. 2 is the flow chart of the register method that proposes of the present invention;
Fig. 3 is the flow chart of private net terminal cancel register;
Fig. 4 is the flow chart that the gatekeeper cancels the private net terminal registration.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Fig. 1 had carried out explanation in background technology.
Fig. 2 is the flow chart of the register method that proposes of the present invention.The main process of method that the present invention proposes is: H.323 acting server is at first set up a port pool of intercepting (one section port address), H.323 after acting server is received the register requirement of private net terminal, from port pool, take out a listening port, the port that the registered address of endpoint registration request is revised the public network IP address become acting server H.323 and intercepted for this terminal, registration to the gatekeeper then, if gatekeeper registers failure or terminal cancel register, H.323 acting server discharges the listening port of this terminal, uses during for other endpoint registration.
Specifically comprise the steps:
The number of the first step, the private net terminal that will act on behalf of according to acting server H.323 defines a port pool; In one embodiment of the invention, the port number in the port pool and H.323 the number of the private net terminal that will act on behalf of of acting server equate.Second step, do the H.323 static NAT of acting server on NAT device, the port pool that defines in the open first step allows the H.323 acting server port of intercepting of the outer terminal access of NAT device; The 3rd the step, H.323 on the acting server port pool that defines in the first step being set, start H.323 acting server; It is acting server that the 4th step, private net terminal are specified the gatekeeper, and to acting server transmission register requirement H.323, the registered address is the private net address of this terminal and a listening port on the terminal.The 5th step, after H.323 acting server is received the register requirement of private net terminal, judge the whether for the first time registration of this terminal; If then in port pool, obtain a port that is not taken, and on this port, intercept by other terminal; The 6th step, H.323 acting server is revised the login request message receive, the port the registered address is revised as the public network address behind the acting server static NAT H.323 and is H.323 intercepted for this terminal on the acting server sends registration message then to the gatekeeper; The 7th step, gatekeeper authenticate after receiving the register requirement of acting server H.323, authentication is passed through, and registers for the first time if find this private net terminal, then adds the log-on message of this terminal, registered if find this private net terminal, upgraded the registration of this private net terminal; If authentication is not passed through, then forwarded for the 9th step to; The 8th step, gatekeeper send acknowledge message to acting server H.323, and H.323 acting server is received this private net terminal information of record after the acknowledge message, and send acknowledge message to this private net terminal, and registration finishes; The 9th step, gatekeeper send refuse information to acting server H.323, and H.323 acting server discharges the listening port that distributes for this private net terminal in the 5th step after receiving refuse information, and sends refuse information to this private net terminal, the registration end.
Fig. 3 is the flow chart of private net terminal cancel register.As shown in Figure 3, the step of private net terminal cancel register comprises: step 1, private net terminal send the message of cancel register to acting server H.323; Step 2, H.323 acting server is released to the listening port of this terminal distribution after receiving this message, sends the message of cancel register then to the gatekeeper; After step 3, gatekeeper receive the deregister message of acting server H.323, send cancel register to acting server H.323 and confirm; Step 4, after H.323 acting server receives that gatekeeper's cancel register is confirmed, transmit this message to private net terminal, cancel register finishes.
Fig. 4 is the flow chart that the gatekeeper cancels the private net terminal registration.As shown in Figure 4, gatekeeper's step of cancelling private net terminal registration comprises: steps A, gatekeeper send the message of cancel register to acting server H.323; Step B, H.323 acting server is released to the listening port that the registration terminal that is cancelled distributes after receiving this message, sends the message of cancel register then to this private net terminal; After step C, private net terminal are received the deregister message of acting server H.323, send cancel register to acting server H.323 and confirm; Step D, after H.323 acting server receives that the cancel register of private net terminal is confirmed, transmit this message to the gatekeeper, the gatekeeper cancels the private net terminal registration and finishes.
Claims (5)
1. the process registration to the gatekeeper of the terminal after the acting server agency network address transition H.323 is characterized in that comprising the following steps:
The number of the first step, the private net terminal that will act on behalf of according to acting server H.323 defines a port pool;
Second step, do the static network address conversion of acting server H.323 on network address translation apparatus, the port pool that defines in the open first step allows the H.323 acting server port of intercepting of the outer terminal access of network address translation apparatus;
The 3rd the step, H.323 on the acting server port pool that defines in the first step being set, start H.323 acting server;
It is acting server that the 4th step, private net terminal are specified the gatekeeper, to acting server transmission register requirement H.323;
The 5th step, after H.323 acting server is received the register requirement of private net terminal, judge the whether for the first time registration of this terminal; If then in port pool, obtain a port that is not taken, and on this port, intercept by other terminal;
The 6th step, H.323 acting server is revised the login request message receive, the registered address be revised as after the conversion of acting server static network address H.323 public network address and the port of H.323 intercepting for this terminal on the acting server, send registration message then to the gatekeeper;
The 7th step, gatekeeper authenticate after receiving the register requirement of acting server H.323, authentication is passed through, and registers for the first time if find this private net terminal, then adds the log-on message of this terminal, registered if find this private net terminal, upgraded the registration of this private net terminal; If authentication is not passed through, then forwarded for the 9th step to;
The 8th step, gatekeeper send acknowledge message to acting server H.323, and H.323 acting server is received this private net terminal information of record after the acknowledge message, and send acknowledge message to this private net terminal, and registration finishes;
The 9th step, gatekeeper send refuse information to acting server H.323, and H.323 acting server discharges the listening port that distributes for this private net terminal in the 5th step after receiving refuse information, and sends refuse information to this private net terminal, the registration end.
2. register method according to claim 1 is characterized in that: the port number in the described first step middle port pond and H.323 the number of the private net terminal that will act on behalf of of acting server equate.
3. register method according to claim 1 is characterized in that: private net terminal registered address in the register requirement of H.323 acting server transmission is the private net address of this terminal and a listening port on the terminal in described the 4th step.
4. register method according to claim 1 is characterized in that described method also comprises the step of private net terminal cancel register:
Step 1, private net terminal send the message of cancel register to acting server H.323;
Step 2, H.323 acting server is released to the listening port of this terminal distribution after receiving this message, sends the message of cancel register then to the gatekeeper;
After step 3, gatekeeper receive the deregister message of acting server H.323, send cancel register to acting server H.323 and confirm;
Step 4, after H.323 acting server receives that gatekeeper's cancel register is confirmed, transmit this message to private net terminal, cancel register finishes.
5. according to claim 1 or 4 described register methods, it is characterized in that described method comprises that also the gatekeeper cancels the step of private net terminal registration:
Steps A, gatekeeper send the message of cancel register to acting server H.323;
Step B, H.323 acting server is released to the listening port that the registration terminal that is cancelled distributes after receiving this message, sends the message of cancel register then to this private net terminal;
After step C, private net terminal are received the deregister message of acting server H.323, send cancel register to acting server H.323 and confirm;
Step D, after H.323 acting server receives that the cancel register of private net terminal is confirmed, transmit this message to the gatekeeper, the gatekeeper cancels the private net terminal registration and finishes.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100428716A CN1299476C (en) | 2004-05-28 | 2004-05-28 | Method for H.323 agent server to register on gatekeeper from terminals after being agent of NAT |
| CNB2004800430517A CN100525202C (en) | 2004-05-28 | 2004-08-02 | A method of registration for the private network terminal to the gatekeeper based on the H.323 protocol |
| PT2004000890A PT2005117346W (en) | 2004-05-28 | 2004-08-02 | ********** unknown ********** |
| PCT/CN2004/000890 WO2005117346A1 (en) | 2004-05-28 | 2004-08-02 | A method of registration for the private nerwork terminal to the gatekeeper based on the h.323 protocol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100428716A CN1299476C (en) | 2004-05-28 | 2004-05-28 | Method for H.323 agent server to register on gatekeeper from terminals after being agent of NAT |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1585364A CN1585364A (en) | 2005-02-23 |
| CN1299476C true CN1299476C (en) | 2007-02-07 |
Family
ID=34601692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100428716A Expired - Fee Related CN1299476C (en) | 2004-05-28 | 2004-05-28 | Method for H.323 agent server to register on gatekeeper from terminals after being agent of NAT |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1299476C (en) |
| PT (1) | PT2005117346W (en) |
| WO (1) | WO2005117346A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1893426B (en) * | 2005-07-08 | 2010-08-04 | 中国电信股份有限公司 | Method and system for realizing pass-through of fire-wall at personal network video signals |
| CN101188582B (en) * | 2006-11-17 | 2010-09-29 | 中兴通讯股份有限公司 | System and method for H.323 terminal communication cross the isomerous network |
| CN101193112B (en) * | 2006-12-01 | 2010-10-27 | 华为技术有限公司 | A registration method and agent server |
| CN101822026B (en) * | 2007-09-28 | 2013-08-28 | 西门子企业通讯有限责任两合公司 | Method and device for establishing connection between packet-oriented communication terminals through network address translation unit |
| US20130138813A1 (en) * | 2011-11-28 | 2013-05-30 | Microsoft Corporation | Role instance reachability in data center |
| CN103607333A (en) * | 2013-11-22 | 2014-02-26 | 深圳维盟科技有限公司 | Local area network port proxy method for port proxy server |
| CN105743715B (en) * | 2016-04-20 | 2020-01-07 | 上海斐讯数据通信技术有限公司 | Management system and method of gateway equipment |
| CN113038592B (en) * | 2019-12-24 | 2023-05-05 | 阿里巴巴集团控股有限公司 | Communication method and device between Internet of things devices |
| CN114745169A (en) * | 2022-04-06 | 2022-07-12 | 北京天融信网络安全技术有限公司 | Multi-port access method, device, equipment, medium and product based on NAT mapping |
| CN117221396A (en) * | 2023-10-26 | 2023-12-12 | 深圳市拓普泰尔科技有限公司 | Network data interaction method, device, system, storage medium and computer equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002089415A1 (en) * | 2001-04-26 | 2002-11-07 | N'ser Community Inc. | Method for communication audio and video data in multimedia communication system using h.323 protocol |
| KR20030007374A (en) * | 2002-12-31 | 2003-01-23 | (주) 컴앤라이프 | NETWORK ACCESS DEVICE FOR SUPPORTING VoIP AND METHOD THEREOF |
| EP1292091A2 (en) * | 2001-09-05 | 2003-03-12 | Samsung Electronics Co., Ltd. | Method for transmitting short message using internet phones and system therefor |
| CN1458797A (en) * | 2002-05-18 | 2003-11-26 | 深圳市中兴通讯股份有限公司 | Method and system for realizing meeting appointment business |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69708281T2 (en) * | 1996-04-24 | 2002-05-16 | Nortel Networks Ltd., St.Laurent | INTERNET PROTOCOL-FILTER |
| CN1208932C (en) * | 2002-06-19 | 2005-06-29 | 华为技术有限公司 | Transmission calling method for multimedia communication |
-
2004
- 2004-05-28 CN CNB2004100428716A patent/CN1299476C/en not_active Expired - Fee Related
- 2004-08-02 WO PCT/CN2004/000890 patent/WO2005117346A1/en active Application Filing
- 2004-08-02 PT PT2004000890A patent/PT2005117346W/en unknown
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002089415A1 (en) * | 2001-04-26 | 2002-11-07 | N'ser Community Inc. | Method for communication audio and video data in multimedia communication system using h.323 protocol |
| EP1292091A2 (en) * | 2001-09-05 | 2003-03-12 | Samsung Electronics Co., Ltd. | Method for transmitting short message using internet phones and system therefor |
| CN1458797A (en) * | 2002-05-18 | 2003-11-26 | 深圳市中兴通讯股份有限公司 | Method and system for realizing meeting appointment business |
| KR20030007374A (en) * | 2002-12-31 | 2003-01-23 | (주) 컴앤라이프 | NETWORK ACCESS DEVICE FOR SUPPORTING VoIP AND METHOD THEREOF |
Also Published As
| Publication number | Publication date |
|---|---|
| PT2005117346W (en) | 2007-05-31 |
| CN1585364A (en) | 2005-02-23 |
| WO2005117346A1 (en) | 2005-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10305856B2 (en) | System and method for logging communications | |
| CN1303798C (en) | Ip multicast distribution system, streaming data distribution system and program therefor | |
| CN1188983C (en) | Method of altering network equipment IP address via network managing equipment | |
| US20070217408A1 (en) | Address Resolution Device, Address Resolution Method, And Communication System Including The Same | |
| CN1658587A (en) | VoIP wireless telephone system and method utilizing wireless LAN | |
| CN1170393C (en) | Method and system of realizing IP speech service of private network | |
| US20060106929A1 (en) | Network conference communications | |
| CN1960338A (en) | Communication controlling method | |
| CN1716941A (en) | Method and call server for establishing a bi-directional peer-to-peer communication link | |
| CN1299476C (en) | Method for H.323 agent server to register on gatekeeper from terminals after being agent of NAT | |
| CN101047548A (en) | Communication in multiple NAT private network | |
| CN1822543A (en) | Method for establishing a peer-to-peer connection between two user agents | |
| CN1859304A (en) | Method for realizing neighbour discovery | |
| CN1917512A (en) | Method for establishing direct connected peer-to-peer channel | |
| US8184622B2 (en) | Integrated internet telephony system and signaling method thereof | |
| CN1863138A (en) | Method for implementing multimedia service NAT transition | |
| CN108848194B (en) | Session establishment method between intranet clients, router and session system | |
| CN1764172A (en) | Multimedia communication proxy system and method capable of crossing network address conversion and firewall | |
| CN1437358A (en) | Relay management method of network equipment based on Telnet protocol | |
| CN100525202C (en) | A method of registration for the private network terminal to the gatekeeper based on the H.323 protocol | |
| WO2000001118A2 (en) | A mobile lan connected to an external network | |
| CN1685690A (en) | Data communications system, computer, and data communications method for parallelly operating standard-based and proprietary resources | |
| CN1735055A (en) | Method for multimedia terminal point-to-point call inside two private networks | |
| CN1832437A (en) | Method for multimedium session transition NAT equipment of IL323 system | |
| CN1677949A (en) | Method for realizing communication between equipments in network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070207 Termination date: 20200528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |