CN1415159A - Flexible communications system - Google Patents

Abstract

A system that supports audio, video, data, and fax communications between a source personal computer and an audio communications device, such as a telephone or a destination personal computer. The system provides for communications first with an entry node, which selects an intermediate server. The selected intermediate server selects an ITSP gateway, for example, which provides access to the audio communications device. The selected intermediate server initiates voice or video communications using for example, the H.323 standard, with the ITSP gateway. The selected intermediate server then informs the source personal computer to communicate directly with the ITSP gateway. Thereby, the system scaleably supports voice or video communications in a ''thin-client'' environment.

Description

Flexible communications system

                  Background

1. invention field

The present invention relates to a kind of method and apparatus be used to video and voice communication are provided.

2. correlation technique discussion

VoIP (voice on the Internet protocol (IP)) has described one group of equipment, be used for to use public internet or private intranet or network rather than use public switch telephone network (PSTN) based on the custom circuit agreement, the transmission of Managing speech information. The major advantage of VoIP and Internet Protocol telephone is that it has been avoided by the business telephone service provider such as MCI^TMOr AT﹠T^TMThe expense of collecting (toll).

H.323 VoIP derives from ITU-T, H.323 is a kind of standard that is proposed by VoIP forum. H.323 standard definition use IP on public internet and in-house network to send the form of audio frequency, video, data or fax. Except IP, VoIP also uses known real-time protocol (RTP) (RTP) to guarantee that communication is provided in real time, has avoided the obvious time-out in voice or the video communication. Use public internet, currently be difficult to control the stand-by period. By enterprise or by the dedicated network that internet telephone service provider (ITSP) manages preferably service can be arranged.

Support the routine techniques of VoIP communication huge software need to be downloaded in user's the personal computer. For the communication link of low speed, the user need to download software for a long time. For the personal computer with low memory storage capacity such as personal digital assistant (PDA), consider the capacity of required software, VoIP communication may not be practicable.

                             Invention is summed up

According to embodiments of the invention, a kind of system is provided, allow at least personal computer and such as the voice communication between the audio communication device of phone. Also can support video, data and facsimile.

In one embodiment of the invention, the communication between personal computer and the audio communication device is supported by at least one intermediate equipment. For the communication between personal computer and the audio communication device, personal computer is communicated by letter with an Ingress node, and this node is selected an intermediate server. Personal computer is then communicated by letter with selecteed intermediate server, and this intermediate server is selected the ITSP gateway. Then, personal computer and ITSP gateway communication. The ITSP gateway is provided to the access of PSTN, and PSTN is provided to the access of purpose audio communication device. Personal computer is communicated by letter with the purpose audio communication device thus.

The advantage of this embodiment is that the software that downloads to personal computer is less than the situation that personal computer must be selected an ITSP and communicate by letter with described ITSP foundation.

Another advantage of this embodiment is to support that the architecture of VoIP communication is telescopic, thereby can carry out a large amount of VoIP communication.

Another advantage of this embodiment is that it can use the H.323 standard of many types to be used for VoIP communication.

In one embodiment, for the communication of client computer to remote client, the communication between client computer and the remote client is led directly to. In this embodiment, client computer is communicated by letter with remote client does not need to support H.323 client computer. So avoided a large amount of software storages.

By detailed description with reference to the accompanying drawings, will more fully understand various embodiments of the invention.

                         The accompanying drawing summary

Fig. 1 simply shows one embodiment of the present of invention, and one of them system is used to provide the communication between any client computer and any purpose audio communication device.

Fig. 2 shows according to the embodiment of the invention, concerns example between the ITSP gateway of ITSP network and the system.

Fig. 3 shows the more details drawing according to the system of the embodiment of the invention;

Fig. 4 shows the process chart according to the embodiment of the invention;

Fig. 5 simply shows according to the embodiment of the invention during the processing of Fig. 4, the message of communicating by letter between client computer, Ingress node, selected intermediate server and the selected ITSP gateway;

Fig. 6 shows the appropriate action flow chart according to the processing of embodiment of the invention Fig. 4;

Fig. 7 shows the sample site measure that uses in one embodiment according to the embodiment of the invention;

Fig. 8 shows the appropriate action flow chart according to the processing of embodiment of the invention Fig. 4;

Fig. 9 shows the appropriate action flow chart according to the processing of embodiment of the invention Fig. 4;

Figure 10 simply shows according to the relation between embodiment of the invention multi-client and the database.

The use of attention same numeral in different figure represents same or analogous parts.

                         Describe in detail

The data of quoting

Following table provides title and the data relevant with these titles. Here the data of quoting refers to the whole of them.

Title	Data
		UDP/IP	Internet Engineering task team (IETF) Request for Comment (Request for Comments) 768
TCP/IP	" TCP/IP and related protocol; about the McGraw-Hill series of compunication " third edition, Ulysses D.Black, mcgraw-hill, inc, 1997, ISBN:0079132820, " the TCP/IP example first volume: agreement ", W.Richard Stevens, Addison-Wesley, 1994.
		H.323 with the correlator agreement, such as RTP	" digital subscriber signaling system No.1 Internet-be used for isdn user-network interface layer 3 explanation of basic call control " (Q.931 ITU-T advise) and " circuit of non-telephone signal transmits "-for the control protocol (H.245 ITU-T advises) of multimedia communication

Client computer is to the purpose communication equipment

General introduction

Fig. 1 has schematically illustrated one embodiment of the present of invention, and wherein system 100 is used to provide any client computer 105-1 to 105-N and any purpose audio communication device 150-1 to 150-Z such as the voice communication between the routine call. In this embodiment, any client computer 105-1 to 105-N is by public or private network such as internet access system 100. Below, if not otherwise specified, any one client computer 105-1 to 105-N of client computer 105 fingers. Below, if not otherwise specified, any one purpose audio communication device 150-1 to 150-Z of purpose audio communication device 150 fingers.

System 100 uses public or private network such as internet to communicate by letter with ITSP network 140-1 to 140-Y. The back, if not otherwise specified, any one ITSP network 140-1 to 140-Y of ITSP network 140 fingers. At least one ITSP network is communicated by letter with public switch telephone network (PSTN), and public switch telephone network allows to communicate by letter with purpose audio communication device 150-1 to 150-Z.

Fig. 2 shows the example that concerns of the ITSP gateway 145-1 to 145-N of an ITSP network 140 and system 100. ITSP network 140 is dedicated networks, and it generally includes a plurality of ITSP gateway 145-1 to 145-N. Usually each ITSP gateway has unique address such as the IP address. For example, the ITSP network is by IDT and the Qwest of New Jersey^TMProvide. Each gateway is coupled at least one public switch telephone network (PSTN) 148. PSTN is provided to telephone unit such as the wired or wireless access of any one purpose audio communication device 150-1 to 150-Z. The back, if not otherwise specified, any one ITSP gateway 145-1 to 145-N of ITSP gateway 145 fingers.

Usually, H.323 each ITSP gateway uses agreement independently to realize supporting communication.

Interface between client computer 105 and the system 100

The example embodiment of client computer 105 is conventional personal computers (PC). A suitable PC comprises: input/output adapter, CPU (for example, microprocessor) and memory. The PC that is fit to for example is IBM PS/2 personal computer, Apple computer, based on the work station of UNIX or such as 3com^TMThe PDA of use Palm VII. PC further comprises such as the display of the computer monitor of super VGA class or other visual display device.

Client computer 105 has resident operating system usually such as Microsoft's Window NT^TMOr Microsoft's Window 95^TMOperating system (OS), IBM OS/2, apple MACOS or such as the UNIX OS of HP-UX.

Client computer 105 also comprises loudspeaker and microphone and sound card, to support such as the broadcasting of the audible information of pc user's voice and the transmission of audible information.

The pc user of accessing Internet or dedicated network can use web browser such as Microsoft Internet Explorer^TMOr Netscape Naviagtor^TMHave access to the webpage of graphic contents. In order to specify a website, user input shows the two resource locator (URL) of requested server and particular data (" webpage "). URL can specify a HTTP (HTTP) or another host-host protocol for the communication between server and the browser. Use the internet, URL is sent to the master server of the storage information corresponding with URL.

In one embodiment, client computer 105 is used the website access subsystem 100 that is stored in the network 110. As the conventional Website server supervisor of the part of network 110 website by client computer 105 accesses. Suitable Website server for example is Sun Microsystem^TMThe SPARC server that can provide, and use the NT4.0 of Microsoft, IIS or UNIX operating system.

The example of website will be described in conjunction with Fig. 7 in the back. The Website server support provides the request of feature from the user's by the website.

System 100

Fig. 3 provides the more detailed figure of system 100. System 100 comprises Ingress node 120, and this Ingress node uses public or private network such as internet to communicate by letter with at least one intermediate server 130-1 to 130-X. Each intermediate server 130-1 to 130-X can use public or private network such as internet to communicate by letter with each ITSP gateway 145-1 to 145-N. Certainly, additional Ingress node 120 can be used for supporting more communication session.

The Ingress node 120 of Fig. 3 monitors the action of intermediate server, and selects an intermediate server support from the voice communication of a separate customer machine 105 such as client computer 105-1. Example embodiment and the Website server of Ingress node 120 are similar. Select an ITSP gateway by managing successively of selecting of Ingress node 120 from the intermediate server of the voice communication of client computer 105, the ITSP gateway is provided to the access of PSTN, and PSTN provides and the communicating by letter of purpose audio communication device 150. Each intermediate server 130-1 to 130-X is similar to Website server. The back, if not otherwise specified, any one intermediate server 130-1 to 130-X of intermediate server 130 fingers.

Database server

In one embodiment, a separate database server (not shown) uses " log database " to store each user's information, and processes the information request about client computer 105 or specific user. Suitable database server is a General Server. The communication of database server and the example of communicating by letter from database server are provided in appendix B.

Software is realized general introduction

Appendix A has been described the code segment of being carried out by the client computer 105 among this embodiment, Ingress node server 120 and intermediate server 130-1 to 130-X as part of the present disclosure. Code segment is used for the process 400 of execution graph 4, communicates by letter between client computer 105 and purpose audio communication device.

In the action 405 of process 400, client computer 105 contact (contact) Ingress nodes 120 are to bring into use system 100. Provide with reference to Fig. 6 and to have moved 405 detailed description.

In action 410, Ingress node 120 is selected an intermediate server 130 that is fit to. Then Ingress node is the selected intermediate servers 130 of client computer 105 signs. The detailed description of action 410 is provided with reference to Fig. 8.

In action 415, the communication channel of selected intermediate server 130 selections and foundation and ITSP gateway 145, and be the selected ITSP gateways of client computer 105 signs. Then, client computer 105 and 145 direct communications of ITSP gateway. As previously described, ITSP gateway 145 is communicated by letter with the PSTN that communicates by letter with purpose audio communication device 150 is provided. Use ITSP gateway 145, client computer 105 is communicated by letter with purpose audio communication device 150. The detailed description of action 415 is provided with reference to Fig. 9.

In action 420, client computer 105 finishes the audio frequency communication session. The below provides the detailed description of action 420.

The advantage of this embodiment is that the communication between client computer 105 and the purpose audio communication device 150 is segmented, so that use Ingress node 120 and intermediate server 130 to carry out selection and the foundation of the communication channel between client computer 105 and the ITSP gateway 145. Thereby the software that downloads to client computer 105 is less than client computer must be selected and the situation about being connected (said " thin client computer " environment) of foundation with the ITSP gateway.

Message examples

Fig. 5 has schematically illustrated during the exemplary operations of the action 405 to 420 of process 400, the message of communication between client computer 105, Ingress node 120, selected intermediate server 130 and the selected ITSP gateway 145. Appendix D provides and has been used for the description of proper protocol of message transfer and the description of other message.

Action 405

Fig. 6 provides the appropriate procedure figure of action 405 (Fig. 4). In action 610, the user uses the figure web browser to provide resource locator (URL) such as Netscape omniselector or Microsoft's browser, or uses the hyperlink access one functional website that comprises according to the embodiment of the invention. For example express with HTML the website, and comprise potential several webpages, and each uses the link of HTML code.

For example, Fig. 7 has described a sample site measure 700. Website 700 comprises: figure touch panel 702, and can input character by this touch panel; Field (field) can be at this input character; Title " address book " 706 for example accesses a phone directory; With 708 the conventional logotype in the position.

In another embodiment, website 700 is provided to user's access of Email, voice mail message and fax. The website that is provided to user's access of Email, voice mail message and fax is known, for example referring to Hotmail.com^TM，Excite.com ^TM，jfax.com ^TM So in this embodiment, website 700 and system 100 allow user voice voice responsive mail message, Email or fax.

In action 610, after appointed website is connected, Website server is uploaded (upload) executable file to the PC of client computer 105, and described executable file consists of " strtp.dll ", " stnet.dll ", " vscp.dll " and " tsd2.dll ". These files and these^*.dll be listed in the appendix A.

With reference to Fig. 6, in action 620, the user in the website 700 field 704 for example input a purpose telephone number.

In one embodiment, when the title " address book " 706 of website 700 is selected, phone directory is offered the user. In this phone directory, select a telephone number startup to the call of purpose audio communication device 150.

In one embodiment, phone directory in database, will be described the order to database with aforesaid database server stores in more detail in appendix B.

In the position 708, show conventional logotype advertisement. For example use the available service of " Doubleclick ofNew York, New York " can arrange advertisement. Advertisement can be followed user's interest. By the advertisement for the specific user is provided, can make the advertising income maximization. In this embodiment, advertising income can be used for the communication cost of Zhi Fuyu purpose audio communication device 150.

Certainly, by being engaged in the logotype advertisement, the user can buy product or the service of advertising.

In action 630, client computer for example uses ICP/IP protocol to be connected to Ingress node 120. Action 630 is the message of " TCP connects (TCP Connect) " 502 (Fig. 5) corresponding to title. The IP address of Ingress node 120 and port numbers are preconfigured in the file of downloading in the action 610. In action 630, client computer to major general's purpose telephone number, ID, password and session id passes to Ingress node 120. ID identifying user and sign such as that in appendix B, describe and user-dependent message in database server stores. Password is used to determine whether to allow the user profile to from database to access by Website server. Session id is used for following the tracks of the state of voice communication.

In action 640, Ingress node 120 for example uses ICP/IP protocol that the contact details of selected intermediate server 130 are provided to client computer 105. With reference to Fig. 5, action 640 is the message of " VEGA server (VEGA Server) " 504 corresponding to table title. In this embodiment, contact details comprise IP address and the port numbers of selected intermediate server. In this embodiment, the IP address is 4 byte Ipv4 addresses (IP version 4) of selected intermediate server 130, and port numbers is that selected server monitoring is in the future from 2 byte port numbers of the communication of client computer 105.

In this embodiment, Ingress node 120 keeps the table of potential intermediate server 130 and the percentage that intermediate server 130 is remained valid and communicated by letter. Appendix C provides the description of suitable technology as the part of the disclosure, thereby Ingress node 120 monitors the activity grade of intermediate servers 130. In this embodiment, Ingress node 120 select the to have minimum movable percentage intermediate server 130 of (for example, by the active session number divided by the max-session number). If all potential intermediate servers 130 are idle to a certain extent, Ingress node selects to have the intermediate server 130 of minimum correlated identities number. Can use other system of selection such as selecting at random.

Action 410

Fig. 8 provides the suitable flow chart of action 410 (Fig. 4). Appendix A provides the description of the program of using in action 410.

In action 810, client computer 105 is used for example TCP/IP, utilizes IP address and the port numbers of previous appointment in action 610 to be connected to selected intermediate server 130. In the example of Fig. 5, action 810 is corresponding to (occurring for the second time) " TCP connection " 506.

In action 820, client computer 105 is for example used TCP/IP, (startup is connected with selected intermediate server 130 for clauses and subclauses 508, message Fig. 5) for " VSCP sets up (VSCP SETUP) " by for example sending title to selected intermediate server 130. Message " VSCP foundation " starts any communication between client computer 105 and the selected intermediate server 130. Following table provides the description of the field of using in message " VSCP foundation ".

Field name	Decimal system word section number	Summary
			ID
	1 to 8	ID
			Password
	9 to 16	Password string
			Client-side medium transmission address style	17 to 18	The type of medium transmission address. Support IPv4, although can use other agreement.
Client-side medium transmission address	19 to 22	The client-side IP address that is used for medium transmission.
			Client-side medium transmission port numbers	23 to 24	The client-side port numbers that is used for medium transmission.
Caller number length	25 to 26	The length of caller number.
			Caller number	27 to N, wherein N is the length of called party number	Called party number length (E.164-maximum 128).
Called party number length	N is to N+1	Called party number length (word).
			Called party number	N+2 is to M, and wherein M is the length of called party number	Called party number (E.164-maximum 128).
The client-side protocol type	M is to M+1	The protocol type that MEDIA FLOW is used. Support RTP, although can use other agreement.
			The client-side media type	M+2 is to M+3	Referring to following
The client-side PT Payload Type	M+4 is to M+5	Referring to following
			The maximum frame of client-side payload	M+6 is to M+7	The heap(ed) capacity of payload
The client-side silence detect enables	M+8	Silence detect enables
			The elimination of client-side echo enables	M+9	Echo elimination enables

Field client-side media type represents the media type that is transmitted.

Media type	Value
		Voice
	0×0001
		Video	0×0002
Data	0×0003
		Fax	0×0004

Field client-side PT Payload Type represent the to encode type of selected media type such as voice, video or data compression algorithm. Current, support the encoded voice payload.

PT Payload Type	Value
		Non-standard	0×0001
G.711A-Law64k	0×0002
		G.711A-Law56k	0×0003
G.711u-Law64k	0×0004
		G.711u-Law56k	0×0005
G.722 64k	0×0006
		G.722 56k	0×0007
G.723.1	0×0008
		G.728	0×0009
G.729	0×000a
		G.729 appendix A	0×000b
IS11172	0×000c
		IS13818
	0×000d
		G.729 appendix B	0×000e
G.729 appendix A appendix B	0×000f
		G.723.1 appendix C	0×0010
The GSM full rate	0×0011
		The GSM half rate	0×0012
GSM improves full rate	0×0013

In action 830, selected intermediate server 130 determines whether to allow client computer 105 beginnings based on the communication of voice or video. Selected intermediate server 130 is carried out checking, comprises the selected intermediate server 130 of client computer 105 uses that determines whether to allow to have specific user ID and password.

If do not allow client computer 105 to use, selected intermediate server 130 sends " discharging (RELEASE) " message (not shown among Fig. 5) to client computer 105. The back will be described message " release " in detail. Do not allow the reason example of client computer 105 to comprise unknown ID, incorrect password and the telephone number of not supporting. Referring to following description to message " release ".

If allow client computer 105 to use, then in action 840, selected intermediate server 130 is selected ITSP gateway (back claims " selected ITSP gateway "). The way of example of selecting an ITSP gateway is to determine the effective route of minimum cost of purpose telephone number. Selecting another way of example of an ITSP gateway 145 is the working load balance method, thereby selects to have the ITSP gateway 145 of minimal amount active session. Load balance has advantageously reduced the impact of single ITSP gateway 145 failures. Select another way of example of ITSP gateway 145 to be based on general structure choice ITSP gateway. Selected ITSP gateway 145 is connected with PSTN 148, connects the purpose telephone number by PSTN 148. Selected ITSP gateway is by the IP address designation.

In action 850, selected intermediate server 130 is communicated by letter with selected gateway 145. The suitable utilization that is connected with selected ITSP gateway 145 is agreement H.323, and the two is known for those skilled in the art. Q.931 and H.245 in action 850, agreement is conventional, and is H.323 describing in the agreement. Referring to for example " digital subscriber signaling system No.1 Internet-be used for isdn user-network interface layer 3 explanation of basic call control " (Q.931 ITU-T advises) and " circuit of non-telephone signal transmits-be used for the control protocol (H.245 ITU-T advises) of multimedia communication ", these are in this reference that all is cited.

Because each ITSP gateway 145 can use stand-alone mode H.323, selected intermediate server 130 advantageously can be supported each stand-alone mode H.323. Do not use selected intermediate server 130, client computer 105 has to support each stand-alone mode H.323, and this support may need huge software is uploaded to client computer 105.

Fig. 9 has been shown in further detail and has moved 850 operation. In this embodiment, ICP/IP protocol is used in the communication of action 850.

In action 910, foundation is connected with specific purpose audio communication device 150. In one embodiment, action 910 further comprises action 910-1 to 910-7.

In action 910-1, selected intermediate server 130 uses by the message of " setting up (SETUP) " of the routine of protocol definition Q.931, provides purpose pstn telephone number to selected ITSP gateway 145. Q.931, action 910-1 is corresponding to 510 " setting up " of Fig. 5.

In action 910-1, selected intermediate server 130 then to client computer initiate a message " (CALLPROCEED) carried out in calling " (clauses and subclauses 512, Fig. 5). " calling is carried out " message is delivered to client computer 105, and current call request is in treatment state at present. In this embodiment, message " calling is carried out " comprises 8 byte values that identify described calling. Message " calling is carried out " comprises for example unique Call Reference Value of 8 bytes, and it identifies specific communication session. Selected intermediate server 130 keeps the state of each ongoing session.

In action 910-2, selected ITSP gateway 145 dialing purpose pstn telephone numbers. Action 910-2 is corresponding to 514 " dialing (Dial) " of Fig. 5.

In action 910-3, PSTN signals to selected ITSP gateway 145, shows that purpose audio communication device 150 notifying the purpose user that one input voice communication is arranged. Action 910-3 is corresponding to 516 " ring-back (Ringback) " of Fig. 5.

In action 910-4, selected ITSP gateway 145 uses by the routine of protocol definition " alarm (ALERT) " message Q.931, replys the notice to the purpose audio communication device by PSTN to selected intermediate server 130. Action 910-4 is corresponding to 518 " the Q.931 alarms " of Fig. 5.

In action 910-5, selected intermediate server 130 sends signal to client computer, shows the purpose user by alarm, and " Call Reference Value " described later be provided. Action 910-5 is corresponding to 520 " VSCP alarm (the VSCP ALERT) " of Fig. 5.

In action 910-6, PSTN passes on the purpose audio communication device to permit communication to selected ITSP gateway. Action 910-6 is corresponding to 522 " answering (Answer) " of Fig. 5.

In action 910-7, selected ITSP gateway 145 uses by the routine of protocol definition Q.931 and connects signal, passes on the purpose audio communication devices to permit communication to selected intermediate server 130. Connect 910-7 corresponding to 524 " Q.931 connecting (CONNECT) " of Fig. 5.

In action 920, set the communication standard between selected intermediate server 130 and the selected gateway 145. In one embodiment, action 920 comprises action 910-1 to 920-2.

In action 920-1, selected intermediate server 130 uses conventional terminal capacity set (the terminal capability set that defines in agreement H.245, TCS) message, (for example pass on the compress technique of appointments in action 820 and media type to selected ITSP gateway 145, voice, video, data or fax). Action 920-1 is corresponding to 526 " the H.245 TCS " of Fig. 5.

In action 920-2, selected ITSP gateway 145 uses the conventional TCS ACK message that defines in agreement H.245, and signaling to selected intermediate server 130 shows the TCS message that receives action 935. Action 920-2 is corresponding to 528 " the TCS ACK " of Fig. 5.

In action 930, between selected intermediate server 130 and selected ITSP gateway 145, set up correspondence. In one embodiment, action 930 comprises action 930-1 to 930-3.

In action 930-1, selected intermediate server 130 uses the conventional principal and subordinate who defines in agreement H.245 to determine (MSD) message, and it oneself is caller to selected ITSP gateway 145 signs. Action 930-1 is corresponding to 530 " the H.245 MSD " of Fig. 5.

In action 930-2, selected ITSP gateway 145 is by being sent in the conventional MSD ACK message that defines in the agreement H.245, and signaling to selected intermediate server 130 shows the MSD that receives action 945. Action 930-2 is corresponding to 532 " the H.245 MSD ACK " of Fig. 5.

In action 930-3, selected intermediate server 130 uses the conventional main MSD message that defines in agreement H.245, and signaling to selected ITSP gateway 145 shows that principal and subordinate's process finishes. Action 930-3 is corresponding to 534 " the H.245 MSD ACK " of Fig. 5.

In action 940, between selected intermediate server 130 and selected ITSP gateway 145, set up voice channel. In one embodiment, action 940 comprises action 940-1 to 940-4.

In action 940-1, selected intermediate server 130 uses the conventional open logic channel (OLC that defines in agreement H.245, open logic channel), send signal to selected ITSP gateway 145, with open voice channel from selected intermediate server 130 to selected ITSP gateway 145. Action 940-1 is corresponding to 536 " the H.245 OLC " of Fig. 5.

In action 940-2, the conventional OLC ACK that H.245 selected ITSP gateway 145 uses shows the TCS that receives action 965 to selected intermediate server 130 signallings. Action 940-2 is corresponding to 538 " the H.245 OLC ACK " of Fig. 5.

In action 940-3, the conventional open logic channel (OLC) that selected ITSP gateway 145 uses as defines in H.245 sends signal to selected intermediate server, with open voice channel from selected ITSP gateway to selected intermediate server 130. Action 940-3 is corresponding to 540 " H.245OLC " of Fig. 5.

In action 940-4, the conventional OLC ACK that selected intermediate server 130 uses as defines in H.245 shows the OLC that receives action 975 to selected ITSP gateway signalling. Action 940-4 is corresponding to 542 " the H.245 OLC ACK " of Fig. 5.

With reference to Fig. 8, in action 860, selected intermediate server 1 30 connects to the client computer notification call by sending " connection " message corresponding to 544 " the VSCP connections " of Fig. 5, and following table provides the description of " connection ".

Field name	Decimal system sequence number
			Call Reference Value	1 to 8	Formerly provide Call Reference Value in " alarm " message.
Server side medium transmission address style	9 to 10	The medium transmission address style. Ipv4 is supported, although can use other agreement.
			Server side medium transmission address	11 to 14	The address of selected ITSP gateway (being the IP address in this embodiment)
Server side medium transmission port numbers	15 to 16	The port numbers of selected ITSP gateway
			Called party number length	17 to 18	Called party number length
Called party number	19 to N, wherein N is called party number length	Called party number (E.164-maximum 128)
			The server side protocol type	N is to N+1	The agreement that MEDIA FLOW is used. RTP is used, although other agreement can be used.
The server side media type	N+1 is to N+2	Be similar to previously described client-side media type
			The server side PT Payload Type	N+3 is to N+4	Be similar to previously described client-side PT Payload Type
The maximum frame of server side payload	N+	5 is to N+6				The heap(ed) capacity of payload
			The server side silence detect enables	N+7	Silence detect enables
The elimination of server side echo enables	N+8	Echo elimination enables

Action 415

In action 415 (Fig. 4), client computer 105 for example uses Real-time Transport Protocol to communicate by letter with selected ITSP gateway 145. RTP is the separate standards agreement for coding and transmitting multimedia MEDIA FLOW known to a person of ordinary skill in the art. Action 415 546 " RTP data (RTP Data) " corresponding to Fig. 5. Certainly, except RTP, can use other agreement, such as any proprietary MEDIA FLOW agreement.

According to the RTP standard, the program of describing in appendix A " strtp.dll " provides the transmission of encoded voice. The example technique of Code And Decode voice can be used " DSP Group of Santa Clara, CA's ". In this embodiment, program " tsd2.dll " comprises the example technique of Code And Decode voice.

So, voice flow direct communication between client computer and selected ITSP gateway. This direct communication has reduced the delay of packets of voice communication. This delay causes postponing significantly in the voice communication.

In one embodiment, before the beginning voice communication, by the loudspeaker of client computer 105, can provide brief audio advertisement to the user. Audio advertisement produces income, can be used for subsidizing the cost with purpose audio communication device 105.

Action 420

In action 420 (Fig. 4), voice communication finishes. For example, when the user wished to wind up a talk, client computer 105 was sent release (Fig. 5,548) to selected intermediate server 130. Equally, when calling receiver wished to wind up a talk, selected intermediate server 130 for example used TCP/IP to send " release " to client computer 105. In this embodiment, in action 420, use " the VEGA server source file " in appendix A, described.

A way of example that finishes voice communication is as follows. Selected intermediate server 130 for example uses the H.245 ESC message that defines in standard H.245, send H.323 session of signal ended (referring to 550 " the H.245 ESC " of Fig. 5) to selected ITSP gateway 145. Then selected ITSP gateway 145 for example uses the H.245 ESC message that defines in standard H.245, sends H.323 session of signal ended (referring to 552 " the H.245 ESC " of Fig. 5) to selected intermediate server 130. Then, selected ITSP gateway 145 sends the on-hook order to PSTN, to disconnect session (hanging up (Hangup) referring to 554 of Fig. 5). Then, selected intermediate server 130 for example uses the Q.931 disconnection message that defines in agreement Q.931, passes on end sessions (referring to 556 " Q.931 disconnecting (disconnect) " of Fig. 5) to selected ITSP gateway 145.

After this, selected intermediate server 130 discharges such as the resource for other the interim data structure of distributing that is moved to end session and is used for other session. In addition, log database is charged in the end that will call out of selected intermediate server 130. Log database recording start time, concluding time, success/failure, caller, callee's telephone number. The database server stores that log database is described by front and appendix B.

DTMF supports

When the user by being pressed in numeral on the website 700 when (for example, being used for voice mail (voice mail)), client computer 105 uses the DTMF message to send numeral to selected intermediate server 130. Then, H.245 selected intermediate server 130 uses message to selected ITSP gateway passes DTMF message.

Following table provides the parameter of DTMF message.

Field name	Decimal system sequence number	Short Description
			Call Reference Value	1 to 8	Describe such as the front.
The DTMF string length	9 to 10	The DTMF string length.
			The DTMF string	11 to N, wherein N is the length of DTMF string	The DTMF character. The maximum length of DTMF string for example is 128 bytes.

Communication stops

At any time, can produce communication by client computer, selected intermediate server 130 or any one use of remote client " VSCP discharges (VSCP REALEASE) " stops. For example, some communication between client computer and selected intermediate server 130 or the remote client or message must receive within the time of distributing. If communication or message can not receive within the distribution time, receiver sends release message to the communications/messages transmitter, to disconnect any communication in the session that starts or activate.

" release " message is used for finishing TCP and connects. For example, if selected intermediate server or client computer do not receive the message such as " foundation ", " calling is carried out ", " alarm " or " connection " within the distribution time, use " release " message. Following table provides the parameter of " release " message.

Field name	Decimal number
		Call Reference Value	1-8
Reason	9-10

The specific communication session of Call Reference Value field identification. Following table provides potential value and the related meanings of each cause field.

Reason	Value
		Unknown cause	0×0001
Do not allow	0×0002
		Do not arrive the destination	0×0003
The destination refusal	0×0004
		The user	0×0005

Client computer is to remote client

In remote client communication, this client computer and remote client are used internet or dedicated network direct communication in client computer. Message " TCP connection ", " VSCP foundation ", " VSCP calls out and carries out ", " VSCP connection ", " RTP data ", " VSCP release " communication that client computer uses the front to describe with reference to Fig. 5 at least. So in this embodiment, each client computer and remote client are only used " the client-side program " described in appendix A. Client computer use the assigned ip address be connected with the remote client port " TCP connection " message initiated with the communicating by letter of remote client. So for example each client computer and remote client are by IP address and port numbers sign.

Advantageously, each client computer does not need to support all H.323 agreement that this will be needed with the ITSP gateway communication. Yet, for the communication of client computer to remote client, only need to support RTP. So the software that each client computer needs is minimized. If client requests is communicated by letter with the purpose audio communication device, any independent realization of selected intermediate server support and the needed H.323 agreement of any ITSP gateway communication.

                                 Improve

The above embodiment of the present invention is exemplary, is not restriction. Obviously, for those skilled in the art under the premise of not departing from the present invention, can make amendment aspect wider and improve. For example, system 100 can easily support video, data or facsimile. Therefore, claims comprise all these changes and improvements that drop in the true scope of the present invention.

                              Appendix A

The Ingress node program

Program " vgk.c " is carried out by Ingress node 120, to support the communication between intermediate server and any client computer. Program " vgk.c " is used (Fig. 4 and 8) in action 405.

The client-side program

" client-side program " carried out by client computer 105, and supports any to client computer 105 and communicating by letter from client computer 105. Put together, the client-side program is used in action 610 and 620 Fig. 6's. In this embodiment, the title that provides in table is that the code segment of " Java file ", " Resource file ", " Microsoft COM Wrapper Class (only Internet browser) ", " Microsoft COM (the Common Object Model) associated documents that are used for Internet-browser ", " the Netscape Plugin associated documents that are used for the Netscape communicator ", " C++ compiler (Microsoft Visual C++6.0) associated documents ", " C++/Header file " and " External Dependencies " is uploaded to client computer.

Program " vegacomm.cpp ", " vegacomm2.cpp " and " vegacomm.h " are by the main client-side application program of together compiling formation.

All code segments that are listed under the C++/Header file table consist of " vscp.dll " together. The compiling of performing a programme " vscp.dsw " beginning " vscp.dll ".

The Java file is used for setting up java applet. It is the main modular of client applications. All end users mutual (interaction) and user interface are realized in these files.

Source file comprises user interface and multimedia object definition.

COM as java applet and^*.dll the interface between the file.

Netscape Plugin file allows control java program, with the control sound card. The Netscape Plugin file that is used for Netscape plays a part identical with the COM module that is used for microsoft the Internet explorer.

File " strtp.dll " is supported RTP communication and the audio coding/decoding function between client computer 105 and any destination device (for example PC is to telephone communication) or any remote client (for example, PC is to PC communication).

The Java file
			File	Explanation	Note
AnswerDialog.java	Be/no message conversation class
			BrowserType.java	For detection of the class of browser type on every side

ContactInfo.java	The personal information and the positional information that contain client computer
			DialDialog.java	The dialing conversational class
DialDialogEvent.java	Dialing dialogue event class
			MySocket.java	Receptacle utility program class
MyUtil.java	Be used for the often utility program class of the method for use
			VegaCommEvent.java	The VegaCommEvent class
VegaCommWrapper.java	The browser associated class that is used for inner vscp method
			Web2PhoneApplet.java	The main java applet class of communicating by letter with vscp engine (Plugin or COM) with browser
Web2PhoneHelper.java	The front end class that is used for the Web2PhoneApplet class

The Resource file
			File	Describe	Note
vscp.rc	Vscp dll From Template comprises version information and source data
			VegaComm.rgs	Be used for registration Vegacomm COM class to the registral source file of Windows
busy.wav	Busy tone	The PCM 8000Hz of Microsoft, 8, the monophonic form
			dialtone.wav	Dial tone	The PCM 8000Hz of Microsoft, 8, the monophonic form
ringback.wav	Ring sound	The PCM 8000Hz of Microsoft, 8, the monophonic form
			Tone0.Wav	The sound of button 0	The PCM 8000Hz of Microsoft, 8

		The position, the monophonic form
			Tone1.wav	The sound of button 1	The PCM 8000Hz of Microsoft, 8, the monophonic form
Tone2.Wav	The sound of button 2	The PCM 8000Hz of Microsoft, 8, the monophonic form
			Tone3.wav	The sound of button 3	The PCM 8000Hz of Microsoft, 8, the monophonic form
Tone4.wav	The sound of button 4	The PCM 8000Hz of Microsoft, 8, the monophonic form
			Tone5.wav	The sound of button 5	The PCM 8000Hz of Microsoft, 8, the monophonic form
Tone6.wav	The sound of button 6	The PCM 8000Hz of Microsoft, 8, the monophonic form
			Tone7.wav	The sound of button 7	The PCM 8000Hz of Microsoft, 8, the monophonic form
Tone8.wav	The sound of button 8	The PCM 8000Hz of Microsoft, 8, the monophonic form
			Tone9.wav	The sound of button 9	The PCM 8000Hz of Microsoft, 8, the monophonic form
Tonestar.wav	The button asterisk (*) sound	The PCM 8000Hz of Microsoft, 8, the monophonic form
			Tonepnd.wav	Button pound (pound) sound (#)	The PCM 8000Hz of Microsoft, 8, the monophonic form

The COM Wrapper Class of Microsoft (only Internet-browser)
			File	Describe	Note
IvegaCommEvent.java	The IvegaCommEvent wrapper that is used for the Java of Microsoft	Produced from vscp.dll by Microsoft Visual J++COM Wrapper
			IvegaComm.java	Be used for the Java's of Microsoft	Produce from vscp.dll

	IvegaComm wrapper
			TagCodecConstants.java	Encoding and decoding constant definition class	Produce from vscp.dll
TagStatusConstants.java	Case constant definition class	Produce from vscp.dll
			VegaComm.java	The VegaComm wrapper that is used for the Java of Microsoft	Produce from vscp.dll

Microsoft COM (the Common Object Model) associated documents that are used for Internet-browser
			File	Describe	Note
vscp.idl	IDL (Interface Definition Language, the IDL) file of the com interface of outside java class is presented in definition
			VscpCP.h	The C stub file that is used for COM tie point interface	Produce from vscp.idl
vscp.h	The stub file that is used for com interface	Produce from vscp.idl
			vscp_i.c	Has the C source file for the statement (declaration) of IDD (interface ID) and CLSID (class ID)	Produce from vscp.idl
vscp_p.c	Comprise the C source file for the proxy stub code of distribution COM	Produce from vscp.idl, do not use

The Netscape Plugin associated documents that are used for the Netscape communicator
			File	Describe	Note
npvscp.cpp	File realized in the C language that is used for basic Netscape Plugin method, VegaPlugin method, VegaCommEvent method	The inner COM that uses
			npwin.cpp	The Win32 interface that is used for Netscape Plugin	From Netscape PluginSDK source
Stubs.c	Be used for Netscape

	The stub file of LiveConnect (Java is to Plugin communication) technology
			VegaPlugin.java	Methods for Netscape Plugin JRI (Java Raw Interface, Java Raw interface) declaration file
VegaCommEvent.java	Events for status updates JRI (Java raw interface) declaration file
			com_serome_VegaComm         Event.c	Call an external Java classes for status Update event method Cross-language interface files
com_serome_VegaComm         Event.h	Call an external Java classes for status Update event method header file	From VegaCommEvent.java Produce
			com_serome_VegaPlugin           .c	Invoked by an external Java classes for Netscape Plugin methods Cross-language interface files	Produced from VegaPlugin.java Raw
com_serome_VegaPlugin            .h	Invoked by an external Java classes for Netscape Plugin methods The header file	Produced from VegaPlugin.java Raw
			SinkObj.h	JRI COM communications (CsinkObj)

C + + compiler (Microsoft Visual C + +6.0) Related Documents
			File	Description	Note
vscp.def	With COM and Netscape Plugin DLL output function is used in conjunction with
			vscp.clw	C language class information file	MSVC internal
vscp.dsp	Project File Information
			vscp.dsw	Project workspace information
stdafx.cpp	AFX files for standard features	MSVC internal

C + + / Header File
			File	Description	Note
VegaComm.cpp	Key features for the implementation file (CvegaComm)	Master File
			VegaComm2.cpp	Key features for the implementation file (CvegaComm)
VegaComm.h	For vegaComm.cpp, vegaComm2.cpp header file
			WaveCtrl.cpp	Manipulate the microphone and speaker hardware devices Equipment (CwaveCtrl.cpp)	Recording or playback
WaveCtrl.h	Header text for WaveCtrl.cpp Item
			stvscp.cpp	Frames / deframing (deframe) VSCP grouping
stvscp.h	VSCP header file
			vscp.cpp	dll master file
vscp.h	dll main header file

Extemal Dependencies
			File	Description	Note
stnet.h	Note...
			stnet.dll	Note...
sterror.h	Stnet defined error
			strtp.h	Stnet defined error...
strtp.dll	RTP DLL	Stnet defined error...
			stg711.h	G.711, G.723 codec DLL header file
Tsd2.dll	G.711, G.723 codec DLL

Intermediate server program

Intermediate server program...

Intermediate server program...
			File	Description	Note
Child.c	Main sub-processing routines and processes each Calling line routine
			h323stub.c	VEGA server for H.323 Stack calling routine
Sendvscp.c	VSCP packet transmission routine
			Utils.c	Miscellaneous routines
Vserver.c	Miscellaneous routines...
			Stdb.c	Miscellaneous routines...
Stdebug.c	Debugging / logging tool

H.323 Cheng Library

H.323 Cheng Library...

H.323 Stack Packages
			H.323 Cheng Library...	Description	Note
Stasn	Using OSS ASN.1 ASN.1 tools package
			sth245	H.245 Abstraction Layer (session management)
sth323m	H.323 multi-session (ToplevelAPI)
			Stnet	TCP / IP extraction layer
stq931	Q.931, and H.225.0 abstraction layer (call (call) Signaling)
			Stras	RAS abstraction layer (registration, admission, and status)
Strtp	Extraction layer RTP ​​(Real Time Protocol)
			Stwin32	Extraction layer RTP ​​(Real Time Protocol)...

Extraction layer RTP ​​(Real Time Protocol)...

Action	Program
			405，410，415，420	Program...
415	External Dependencies
		Program...	Intermediate server source files
850	H.323 Stack Packages

                          Appendix B: Database

The following command from the web server to the database server issues. Described here is used by the database server The response stated response. Figure 10 schematically illustrates a client 105-i and 105-i, and between database 1000 Relationship. In one embodiment, the use of TCP / IP to send commands.

The following command from the web server to the database server issues. Described here is used by the database server The response stated response. Figure 10 schematically illustrates a client 105-i and 105-i, and between database 1000 Relationship. In one embodiment, the use of TCP / IP to send commands....

The following command from the web server to the database server issues. Described here is used by the database server The response stated response. Figure 10 schematically illustrates a client 105-i and 105-i, and between database 1000 Relationship. In one embodiment, the use of TCP / IP to send commands....

Command ...	Command ...
		LOGIN     REGISTER     LOGOFF     GETSTATUS     UNREGISTER     ADDUSER     DELETEUSER     MODIFYUSER     GETUSER     ADDCONTACT     DELETECONTACT     MODIFYCONTACT     GETCONTACTLIST     GETCONTACTINFO     FINDUSERNAME	0×10   0×11   0×12   0×13   0×14   0×20   0×21   0×22   0×23   0×30   0×31   0×32   0×33   0×34   0×50

Return code

The following table shows the return codes and associated values. Return code in response to a command generation.

Command	Value
		RETCODE_SUCCESS   RETCODE_INVALID_USERID   RETCODE_INVALID_CONTACTID   RETCODE_INVALID_USERNAME   RETCODE_INVALID_PASSWORD	0×00   0×01   0×02   0×03   0×04

RETCODE_INVALID_IPADDRESS   RETCODE_INVALID_PORT   RETCODE_SERVER_ERROR   RETCODE_ALREADY_EXIST   RETCODE_INVALID_FOLDERID   RETCODE INVALID_FOLDERNAME   RETCODE_LOGIN_FIRST   RETCODE_INVALID_SESSIONID   RETCODE_ALREADY_CONNETED   RETCODE NO OWNER

0×05   0×06   0×07   0×08   0×09   0×0a   0×0b   0×0c   0×0d   0×0e

LOGIN

LOGON command is to log on to the selected server's command center. LOGON command format is as follows.

Field name	Field name...	Field name...
			Command User name Password ...	1        2-11       12-21	Command User name Password ...

The response for LOGIN

The response for LOGIN...

The response for LOGIN...	Decimal number
		Return code Session ID	1      2-33

Return code is in any one of the following: RETCODE_SUCCESS, RETCODE_INVALID USERNAME, RETCODE_INVALID_PASSWORD, or RETCODE_SERVER_ERROR. Session ID previously been described.

REGISTER

Return code is in any one of the following: RETCODE_SUCCESS, RETCODE_INVALID USERNAME, RETCODE_INVALID_PASSWORD, or RETCODE_SERVER_ERROR. Session ID previously been described....

Return code is in any one of the following: RETCODE_SUCCESS, RETCODE_INVALID USERNAME, RETCODE_INVALID_PASSWORD, or RETCODE_SERVER_ERROR. Session ID previously been described....	Decimal number
		Command Session ID IP addresses Port number Override flag	1     2-33     34-37     38-39     40

Command: 0 × 11

Command: 0 × 11...

Command: 0 × 11...

Port number: The port number selected intermediate server

Override flag is one of the following

NO_OVERRIDE (0 × 0): If you do not replace the information already exists

OVERRIDE (0 × 01): If you already have replacement information

The response for the REGISTER

The response to the REGISTER command format is as follows.

Field name	Decimal number
		Return code
	1        2-5
		Return code...

Return code...

The user ID has been described previously.

LOGOFF

LOGOFF command to specify which session to end. LOGOFF command format is as follows.

Field name	Decimal number	A brief description of
			A brief description of...	1       2-33	A brief description of...

The response on the LOGOFF

No response.

GETSTATUS

No response....

No response....	Decimal number	A brief description of
			Command User ID User name	1       2-5       6-15	0 × 13 Has been described previously Has been described previously

0 × 13 Has been described previously Has been described previously...

0 × 13 Has been described previously Has been described previously...

Field name	Decimal number
		Return code Status IP addresses Port number	1       2      3-6      7-8

Return code is any of the following: RETCODE_SUCCESS, RETCODE_INVALID_USERID, RETCODE_INVALID_USERNAME, or RETCODE_SERVER_ERROR.

Status is any of the following:

STATUS_NOTCONNECTED (0 × 00): not registered user clients;

STATUS_CONNETED (0 × 01): Registered user client.

IP address has already been described.

Port number has been described previously.

UNREGISTER

UNREGISTER command is a request to unregister from the database client IP address / port information. UNREGISTER command format is as follows.

Field name	Decimal number
			Command User ID User name	1      2-5      6-15	0 × 14 Has been described previously Has been described previously

The response on the UNREGISTER

No response.

ADDUSER

ADDUSERCommand is to add a new user to the database request, and provide a new user-related Information.ADDUSERCommand format is as follows.

Field name	Decimal number	A brief description of
			Command User name Name Surname Address 1 Address 2 City State ZIP Code Phone 1 Phone 2 Fax email Password Public Option ...	1     2-11     12-21     22-41     42-81     82-121     122-141     142-143     144-153     154-173     174-193     194-213     214-277     278-287     288	0 × 20 Has been described previously Open option, '0 'in the public eye Public record user information, 'N' Does not expose the user information ...

0 × 20 Has been described previously Open option, '0 'in the public eye Public record user information, 'N' Does not expose the user information ...

ToADDUSERCommand response is the following format.

Field name	Decimal number
		Return code
	1

Return code is any of the following: RETCODE_SUCCESS, RETCODE_INVALID_USERNAME, RETCODE_INVALID_PASSWORD, RETCODE_ALREADY_EXIST, or RETCODE_SERVER_ERROR.

DELETEUSER

DELETUSERCommands are deleted from the database user's request.DELETUSERCommand Format Below.

		A brief description of
			Command	1	0×21
Session ID	2-33	Has been described previously

The response on DELETEUSER

On DELETEUSER command response is the following format.

	Decimal number
		Return code
	1

Return code is any of the following: RETCODE_SUCCESS, RETCODE_INVALID_SESSIONID, or RETCODE_SERVER_ERROR.

MODIFYUSER

MODIFYUSERCommand is to modify the database user information requests.MODIFYUSERCommand format is as follows. Any change in the field is 0 × 00.

	Decimal number	A brief description of
			Command	1	0×22
User name	2-11
			Name	12-22
Surname	22-41

Address 1	42-81
			Address 2	82-121
City	122-141
			State	142-143
State...	144-153
			State...	154-173
Phone 2	174-193
			Fax	194-213
Email	214-277
			Password	278-287	Has been described previously
Has been described previously...	288	Has been described previously...

The response on MODIFYUSER...

The response on MODIFYUSER...MODIFYUSERCommand response format is as follows.

	Decimal number
		Return code
	1

Return code is any of the following: RETCODE_SUCCESS, RETCODE_INVALID_SESSIONID, or RETCODE_SERVER_ERROR.

GETUSERINFO

GETUSERINFOCommand to retrieve user information from the database requests.GETUSERINFOCommand format is as follows.

	Decimal number	A brief description of
			Command Session ID	1        2-33	Command Session ID...

Command Session ID...

ToGETUSERINFOCommand response format is as follows.

	Decimal number	A brief description of
			Return code	1
User name	2-11
			Name	12-22
Surname	22-41
			Address 1	42-81
Address 2	82-121
			City	122-141
State	142-143
			ZIP Code	144-153
Phone 1	154-173
			Phone 1...	174-193
Phone 1...	194-213
			Email	214-277
Password ...	278-287	Password ...
			Public Option ...	288	Public Option ...

Return code is any of the following: RETCODE_SUCCESS, RETCODE_INVALID_SESSIONID, or RETCODE_SERVER_ERROR.

ADDCONTACTINFO

ADDCONTACTINFOCommand is to add a new contact to the contact list is stored in the user database Medium.ADDCONTACTINFOCommand format is as follows.

	Decimal number	A brief description of
			Command	1	0×30
Session ID	2-33	Has been described previously
			Folder ID	34-35	2-byte identifier folder
User name	36-45

Name	46-65
			Surname	66-85
Phone 1 Type	86	Described below
			Phone 1	87-106
Phone 1...	107	Phone 1...
			Phone 2	108-127
Telephone three types	128	Described below
			Phone 3	129-148
Phone 4 types	149	Described below
			Phone 4	150-169
Email	170-233

Phone type is any of the following:

HOME_PHONE: Home Phone Number

WORK_PHONE: Work Phone Number

CELL_PHONE: cellular (cell) phone number

PAGER_PHONE: pager number

OTHER_PHONE: Other Number

The response on ADDCONTACTINFO

ToADDCONTACTINFOCommand response format is as follows.

	Decimal number
		Return code Contact ID	1      2-5

Return code is any of the following: RETCODE_SUCCESS, RETCODE_INVALID_SESSIONID, RETCODE_INVALID_USERNAME, RETCODE_ALREADY_EXIST, or RETCODE_SERVER_ERROR.

Contact ID is a 4-byte connection identifier.

DELETECONTACTINFO

DELETECONTACTINFOCommands are stored in the database from the contact list of the user deleted In addition to contact information requests.DELETECONTACTINFOCommand format is as follows.

	Decimal number	A brief description of
			Command	1	0×31
Session ID	2-33	Has been described previously
			Contact ID	34-37	Has been described previously

Has been described previously...

Has been described previously...DELETECONTACTINFOCommand response format is as follows.

8    7    6    5    4    3    2    1	Decimal number
		Return code
	1

Return code is any of the following: RETCODE_SUCCESS, RETCODE_INVALID_SESSIONID, RETCODE_INVALID_CONTACTID, RETCODE_NO_OWNER, or RETCODE_SERVER_ERROR.

MODIFYCONTACTINFO

MODIFYCONTACTINFOCommands are stored in the database to modify the user mailing list The link request.MODIFYCONTACTINFOCommand format is as follows.

	Decimal number	A brief description of
			Command	1	0×32
Session ID	2-33
			Contact ID	34-37
Folder ID	38-41
			User name	42-51
Name	52-71
			Surname	72-91
Phone 1 Type	92
			Phone 1	93-112

Phone 2 types	113
			Phone 2	114-133
Telephone three types	134
			Phone 3	135-154
Phone 4 types	155
			Phone 4	156-175
Email	176-239

The response on MODIFYCONTACTINFO

ToMODIFYCONTACTINFOTo...

To...

GETCONTACTLIST

GETCONTACTLISTCommand based on the provided search criteria, the request from the user contact list contact Tables.GETCONTACTLISTCommand format is as follows.

	Decimal number	A brief description of
			Command	1	0×33
Session ID	2-33
			Folder ID	34-35
Starting index	36-37	Parts that meet your search criteria link Will have to be smaller than the starting index Retrieve contact discarded.
			Parts that meet your search criteria link Will have to be smaller than the starting index Retrieve contact discarded....	38-39	Parts that meet your search criteria link Will have to be smaller than the starting index Retrieve contact discarded....
The first index characters	40	Search with the first and last word Characters beginning with the letter between the users Name of contact.
			Finally index characters	41	Search with the first and last word

		Characters beginning with the letter between the users Name of contact.
			Search string	87-150	Match search for the contact list String.
Sorting options	151	Category option is any of the following: SORT_LASTNAME_ASC, SORT_LASTNAME_DES, SORT_FIRSTNAME_ASC, SORT_FIRSTNAME_DES, SORT_USERNAME_ASC Or SORT_USERNAME_DES.

The response on GETCONTACTLIST

ToGETCONTACTLISTThe response header followed by multiple contact entry.

Header

	Decimal number
		Decimal number...	1-2      3-4

Decimal number...

	Decimal number	A brief description of
			Contact ID	1-4	4 bytes contact
Contact User ID	5-8	Contact user ID 4 bytes
			Name	9-28
Surname	29-48
			Phone 1 Type	49
Phone 1	50-69
			Phone 2 types	70
Phone 2	71-90

Telephone three types	91
			Phone 3	92-111
Phone 4 types	112
			Phone 4	113-132
Email	133-196	Null-terminated ASCII string

Phone type is any of the following:

HOME_PHONE (home phone number),

WORK_PHONE (work phone number),

CELL_PHONE (cellular telephone number),

PAGER_PHONE (pager number),

PAGER_PHONE (pager number),...

GETCONTACTINFO

GETCONTACTINFOPAGER_PHONE (pager number),...

GETCONTACTINFOCommand format is as follows. ...

	Command format is as follows. ...	A brief description of
			Command	1	0×34
Session ID	2-33
			User ID	34-37
Contact ID	38-41

The response on GETCONTACTINFO

ToGETCONTACTINFOCommand response format is as follows.

	Decimal number	A brief description of
			Return code	1
Contact User ID	2-5
			Name	16-35
Surname	36-45
			Phone 1 Type	46
Phone 1	47-76

Phone 2 types	77
			Phone 2	78-97
Telephone three types	98
			Phone 3	99-118
Phone 4 types	119
			Phone 4	120-139
Email	140-203

Return code is any of the following: RETCODE_SUCCESS, RETCODE_INVALID_SESSIONID, RETCODE_INVALID_USERID, RETCODE_INVALID_CONTACTID, RETCODE_NO_OWNER, RETCODE_SERVER_ERROR.

Phone type is any of the following:

HOME_PHONE (home phone number),

WORK_PHONE (work phone number),

CELL_PHONE (cellular telephone number),

PAGER_PHONE (pager number),

OTHER_PHONE (other numbers).

FINDUSERNAME

FINDUSERNAMECommand is a request matches surname, first name and email user table.FINDUSERNAMECommand format is as follows.

	Decimal number	A brief description of
			Command	1	0×50
Name	2-21
			Surname	22-41
Email	42-105

The response on FINDUSERNAME

ToFINDUSERNAMECommand response includes a header followed by multiple contact entry.

Header

8    7    6    5    4    3    2    1	Decimal number
		Entrance #	1-2

Each user entry

8    7    6    5    4    3    2    1	Decimal number
		User name Name Surname	1-10      11-30      31-50

Each user name, first name, last name is null-terminated ASCII string.

                            Appendix C

Entry node to maintain the IP address, port number, and the selected intermediate server status information, the ingress node Further according to the state information of the client's call request is routed to an intermediate server.

Entry node can be used to disable or enable an intermediate server. In the middle of the selected server failure situation State, the backup server can be easily replaced middle intermediate server failure.

Entrance to keep all intermediate server node information table. Entrance to the intermediate node periodically Services Is spread REPORT_REQUEST packet, and all intermediate servers grouped according to registration / report it Their information. Because REPORT_REQUEST packet is periodically transmitted, a new intermediate server can Enough is added, there is no need to restart the entry node. In the present embodiment, the IP on the UDP (with User datagram protocol) transmission REPORT_REQUEST.

REPORT_REQUEST packet including the IP address and port number. IP address, for example, the entry node 4-byte IPv4 address. Ingress port number, for example, a 2-byte receive a response the port number.

Intermediate server response REPORT_REQUEST, send SERVER_REPORT groupings. It Contains the IP address / port information and intermediate server 130 loading information. In this embodiment, the use of UDP / TCP / IP transport SERVER_REPORT.

The following table describes the fields in SERVER_REPORT grouping.

Field name	Decimal number
		IP addresses Port number Activation Sessions Maximum number of sessions	1-4      5-6      7-8      9-10

IP address, for example, 4 bytes of respective intermediate server IPv4 address. Port number, for example, in the corresponding Answering a server from the client to communicate two-byte port number. Once the port number from the entry node The request is passed to the client. Activate the corresponding intermediate server sessions is the number of calls being processed. That Information from the entrance used to assign client node uses the call request. The maximum number of sessions the corresponding intermediate server Services can handle the maximum number of concurrent calls.

                      Appendix D: Message

Message Transfer Protocol

Provide information suitable transmission topology description. In this embodiment, the message using the TCP / IP transport. The following Conventional TCP header is used to transmit all messages.

Field name	Decimal number
		Protocol discriminator (high byte)	1
Protocol discriminator (low byte)	2
		Content length (high byte)	3
Content length (low byte)	4

Protocol discriminator specified byte order. Byte sequence is used to form a "word" in this order. Some flat Taiwan first to use high byte, low byte first used some platforms. For example, to express the number "1", On some systems, it is 0001, on other systems is 0100. Byte order on different CPU platforms Is different. For example, Sun SPARC and Intel use different byte order. For network applications, Which typically pass data to other different types of systems, so that the remote party to know the word is being used Section sequence program is important.

In this embodiment, the protocol discriminator is 0 × 5354. Content-Length header that indicates a packet and message The total length of the content together.

Message header

The following is the message header.

Field name	Decimal number
		Message type (high byte)	1
Message type (low byte)	2
		Version Information - Main (high byte)	3
Version Information - Major (low byte)	4
		Version Information - secondary (high byte)	5
Version Information - minor (low byte)	6

Message Type field specifies the type of message. The following table provides the correlation values ​​and messages.

Message type	Value
		Establish	0×0001
Calls	0×0002
		Connection	0×0003
Alarm	0×0004
		Release	0×0005
DTMF	0×0006
		Status	0×0007

Version Information field specifies the version number of the message. Because the message protocol definition by using the version information Can be changed in the future. If it is higher than the version supported by the receiver, the receiver can reject the message.

Version messages

Version messages...

Version messages...

Field name	Decimal number
		Call reference value	1-8
Status	9-10

Status...

Claims (20)

1. Status...

   Access to a Web site;

   Supplied to the entry node of the link information;

   Supplied to the intermediate node, the link information;

   Access intermediate nodes;

   Providing a link to the gateway node information; and

   Access Gateway Node.
2. Access Gateway Node....
3. Access Gateway Node....
4. 4, as claimed in claim 1, wherein said gateway node comprises ITSP gateway.
5. 5, as claimed in claim 1, further comprising using the receiver associated with the audio object PSTN.
6. 6, as claimed in claim 5, wherein said audio receiver comprises a remote client object Machine.
7. 7, as claimed in claim 1, wherein said intermediate node and the gateway node to establish H.323-based communications.
8. 8, as claimed in claim 1, wherein said web site providing advertising, and wherein Communication can choose any user.
9. 9, A method for providing a client and the destination communication between the audio receiver means, said apparatus comprising:

   At least one gateway server can communicate with the destination audio receiver;

   At least one intermediate server, with said at least one gateway server communication;

   Entry node, with said at least one intermediate server and the client communicate, wherein

   The client node sends signals to said inlet choose an intermediate server;

   Select said selected intermediate server gateway server;

   Said selected intermediate server starts communication with the gateway server, and

   The audio receiver and the destination client without using an entry node to communicate.
10. 10, as claimed in claim 9, wherein said object includes a distal passenger audio receiver Client.
11. 11, as claimed in claim 9, wherein said means provided to the client through the advertisement, Provide the client and purpose between audio receiver free (free) audio communication.
12. 12, as claimed in claim 11, wherein said advertisement includes video ads.
13. 13, as claimed in claim 11, wherein said advertisement comprises an audio advertisement.
14. 14, as claimed in claim 9, wherein said object includes a distal passenger audio receiver Client.
15. 15 A to provide customers with free audio communication method including the steps of:

    To provide users with advertising;

    The purpose of providing audio receiver identifier; and

    Purpose audio receiver identifier provides the signal path for audio communication.
16. 16, as claimed in claim 15, wherein said providing advertisement further comprises: using Website provides visual advertising.
17. 17, as claimed in claim 15, wherein said providing advertisement further comprises: generating Audio Ads.
18. 18, as claimed in claim 15, wherein said providing signal path further comprises:

    Supplied to the entry node of the link information;

    Supplied to the intermediate node, the link information;

    Access to said intermediate node;

    Providing a link to the gateway node information;

    Accessing the gateway node.
19. 19, as claimed in claim 15, wherein said object includes a distal passenger audio receiver Client.
20. 20, as claimed in claim 19, wherein said destination identifier comprises audio receiver The IP address of the remote client.

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