CN100433752C - Method of subscriber registration and communication in telephone terminal of session initiation protocol (SIP) - Google Patents

Abstract

The invention discloses a user registration and conversation method of a session initiation protocol (SIP) telephone terminal. In this method, a main control process and multiple user agent processes are set in the embedded system of the SIP telephone terminal, wherein each user agent process is independent of each other and corresponds to a registered user respectively, and the main control process passes through the user agent process The communication between control individual user agent processes. When a user registers with a SIP telephone terminal, the main control process assigns an independent user agent process to the user, and revokes the user agent process when the user logs out. When the registered user initiates a call or is called and the SIP phone terminal is in an idle state, the master control process dispatches the user agent process corresponding to the user and records that the phone terminal is in an occupied state, and then the user agent process performs communication command interaction and establish a session channel.

Description

User registration and call method in session initiation protocol telephone terminal

technical field

The invention relates to session initiation protocol (SIP) technology, in particular to a user registration and conversation method in a SIP telephone terminal.

Background technique

With the development of the Internet, the communication between people is no longer limited to fixed communication and mobile communication, and the Internet Protocol (IP) telephony technology for communication through the Internet is also gradually developed and popularized rapidly. In order to standardize IP telephony signaling control, the Internet Engineering Task Force (IETF) proposed the SIP protocol in RFC 3261.

The SIP protocol is used to control the signaling interaction of the IP phone, so as to establish the communication between the two parties. At present, there are already IP telephone terminals based on the SIP protocol, which we call SIP telephone terminals. The SIP telephone terminal here may be, for example, a PC installed with IP telephone software and corresponding hardware. Similar to common fixed telephone terminals and mobile telephone terminals identified by telephone numbers, SIP telephone terminals must also have an identifier, which can be an E164 number or a Uniform Resource Locator (URL) address. If a user wants to use an IP phone, he first needs to register his identification information with the network on the SIP terminal, that is, the E164 number or URL address. When a user actually makes a call, the network identifies the user through the user's identification information. For example, when the user is called, the network rings the SIP telephone terminal of the called user through the identification information of the called user input by the calling user, and the called user answers after hearing the ringing, thereby establishing the relationship between the calling user and the called user. conversation channel between.

Currently, a SIP terminal can only support a single user, that is, a SIP terminal can only be used by one user. Within a period of time, only one user can register its identification information with the network, that is, the E164 number or URL address. Other users can no longer use the terminal to register another identification information with the network, but can only choose to register on another SIP terminal, or can only register after the user of the original SIP terminal has logged out. In this way, since the SIP terminal can only support a single user but not multiple users, terminal resources and network resources cannot be fully utilized, and costs for users and system providers are increased.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a user registration and call method of a SIP telephone terminal, so that a SIP telephone terminal supports simultaneous registration and use of multiple users, thereby rationally utilizing terminal resources and network resources, and reducing user and system costs. business cost.

Above-mentioned purpose of the present invention is achieved by following technical scheme:

A user registration and conversation method of a session initiation protocol SIP telephone terminal, at least comprising:

a. set a main control process and more than two user agent processes in the embedded system of the SIP telephone terminal;

B. when a user utilizes this SIP telephone terminal to register, the master control process assigns an independent user agent process for the user after receiving at least the user information comprising the user identification, and allocates system resources corresponding to the user agent process;

c. When a registered user operates a SIP telephone terminal to initiate a call, the main control process determines the user identification of the registered user, dispatches the user agent process corresponding to the registered user according to the user identification and records that the telephone terminal is in an occupied state, and the user agent process Perform signaling interactions to attempt to establish a session channel;

When a SIP telephone terminal receives a call for a registered user, the main control process judges whether the telephone terminal is in an occupied state, and when the telephone terminal is not in an occupied state, determines the user identification of the registered user, and schedules a call corresponding to the registered user according to the user identification. The user agent process of the registered user records that the telephone terminal is occupied, and the user agent process performs signaling interaction and establishes a session channel.

In the above method, before the main control process receives user information in step b, it further includes: the main control process prompts the user to input user information, wherein receiving user information is receiving information input by the user through the SIP phone terminal. Alternatively, a smart card reader can be integrated in the SIP telephone terminal. Before the main control process receives user information in step b, it further includes: the main control process prompts the user to insert a smart card containing user information, wherein the user information is received by the smart card reader Extract the user information in the smart card.

In the above method, the user information in the step b includes ringing information, and the master control process further includes after distributing an independent user agent process for the user: the user agent process preserves the ringing information set by the user;

In step c, when the SIP telephone terminal receives a call for a registered user, after the main control process schedules the user agent process corresponding to the registered user, it further includes: the user agent process rings according to the ringing information preset by the registered user bell.

In the above method, the SIP telephone terminal includes a display screen, and when the SIP telephone terminal receives a call for a registered user in step c, after the master control process schedules the user agent process corresponding to the registered user, it further includes: user agent The process displays the identification information of the registered user on the display screen of the SIP telephone terminal.

In the above method, the user information in step b includes the incoming call password set by the user. In step c, when the SIP telephone terminal receives a call to a registered user, after the main control process dispatches the user agent process corresponding to the registered user Further include: the user agent process rings to the user, and prompts the user to input the incoming call password, and judges whether the user input is correct after receiving the incoming call password input by the user, if yes, performs signaling interaction and establishes a session channel; otherwise, ends This process.

In the above method, when the SIP telephone terminal receives a call for a registered user in step c, when the main control process judges that the telephone terminal is in an occupied state, the main control process dispatches the user agent process of the registered user, and the user agent process sends The calling user sends a response message indicating that the called SIP phone terminal is busy.

In the above method, after the main control process judges that the SIP telephone terminal is in the occupied state in the step c, it further includes:

The main control process prompts the first registered user to enter the new call and prompts the first registered user to select one of the following three items: rejecting the new call, maintaining the current conversation and ending the current conversation; the first registered user is currently occupied Registered users of the above-mentioned SIP telephone terminal;

When the first registered user selects to reject the new call, the master control process dispatches the user agent process of the second registered user, and the user agent process sends a response message indicating that the called SIP telephone terminal is busy to the calling user; the second registered user is the currently called registered user;

When the first registered user chooses to keep the current call, the main control process dispatches the user agent process of the second registered user, and the user agent process rings the second registered user, and establishes a session channel after the second registered user answers, and in the second After the registered user stops talking, remove the conversation channel, then dispatch the user agent process of the first registered user, and continue the call processing of the first registered user by the user agent process of the first registered user;

When the first registered user chooses to end the current conversation, the main control process dispatches the user agent process of the second registered user, which rings the second registered user, establishes a session channel after the second registered user answers, and Dismantle the session channel after the registered user stops talking.

In the above method, the user information in step b includes the operation interface password set by the user, and the SIP telephone terminal includes a display screen, which displays the public main interface when the SIP terminal is in a waiting state, and displays it when the user goes off-hook. The screen prompts the user to input the password of the operation interface. After judging that the password entered by the user is correct, the user operation interface corresponding to the user is displayed, and the public main interface is displayed again after the user hangs up.

The above method may further include: when the registered user of the SIP telephone terminal logs out, the main control process revokes the user agent process allocated for the registered user, and releases the system resource allocated for the registered user agent process.

As can be seen from the technical scheme of the present invention, the present invention sets a main control process and a plurality of user agent processes in the embedded system of the SIP telephone terminal, wherein each user agent process is independent of each other and corresponds to an independent user , the main control process controls each user agent process through communication with the user agent process. When a user registers with a SIP phone terminal, the main control process assigns an independent user agent process to the user, and when the registered user logs out, the main control process revokes the user agent process. When a registered user initiates a call, the main control process determines the user ID of the registered user, dispatches a user agent process corresponding to the registered user according to the user ID and records that the telephone terminal is in an occupied state, and then the user agent process performs signaling interaction to Attempt to establish a session channel. When the registered user is called, it will first check whether the state of the SIP telephone terminal is in the occupied state. If it is not in the occupied state, the master control process dispatches the user agent process corresponding to the user and records that the telephone terminal is in the occupied state, and then the The user agent process performs signaling interaction and establishes a session channel.

By setting the main control process and the user agent process, and by recording and judging the state of the SIP telephone terminal, the present invention realizes the registration of multiple users on the same SIP telephone terminal and the registered multiple users can use the SIP The telephone terminal makes a call, so that multiple users use the same SIP telephone terminal, which can effectively save telephone terminal resources and network resources, and thus reduce the cost of users and system providers. Therefore, the present invention has broad market prospects.

Description of drawings

Fig. 1 is an overall flowchart of the method according to the present invention.

FIG. 2 is a flowchart of the registration process according to the present invention.

Fig. 3 is a flow chart of the process of initiating a call by a SIP telephone terminal according to the present invention.

Fig. 4 is a flow chart of the process of receiving a call by a SIP telephone terminal according to the present invention.

Detailed ways

The present invention will be described in detail below through the accompanying drawings and specific embodiments.

In order to realize the purpose of registering multiple users on the same SIP telephone terminal, and the registered multiple users can use the SIP telephone terminal to make a call, the present invention adopts multi-process technology in the embedded system of the SIP telephone terminal, and also It is to set up a main control process and multiple user agent processes. The user agent process executes calling/called operations and registration/logout operations for each registered user, and the master control process controls the cooperative work between the user agent processes. In reality, both the main control process and the user agent process are software state machines that communicate with each other but are relatively independent.

In the present invention, each user agent process is responsible for implementing various operations and maintaining various states of the user on behalf of the corresponding user, such as registering with the SIP registration server of the network on behalf of the user, and repeatedly updating according to a specified cycle. When a user operates a SIP phone terminal to initiate a call or a SIP phone terminal receives a call, each user agent process generates a request, sends a request, processes a response on behalf of the corresponding user according to user information, and performs method analysis, header analysis, and processing of the received message. Content processing, application extension, response generation and other operations, and call the corresponding hardware and software resources to establish a two-way session channel after the signaling interaction is successful. Therefore, each user agent process can realize the user agent (UA) function defined in the SIP protocol.

The overall flow of the present invention will be described below with reference to FIG. 1 . As shown in FIG. 1 , first at step 101 , a master control process is set in the embedded system of the SIP telephone terminal. The embedded system here is the software and hardware system adopted by the SIP telephone terminal.

In step 102, when a user utilizes this SIP telephone terminal to register, the main control process prompts the user to input user information, and after receiving the user information input by the user, assigns an independent user agent process for the user, and assigns a corresponding System resources for this user agent process. The user information here includes at least the user identification, that is, the user's E164 number or URL address.

In step 103, when a user operates a SIP telephone terminal to initiate a call, the main control process determines the user ID of the user according to the calling user information in the call request, dispatches the user agent process corresponding to the user according to the user ID and records the call The terminal is in the occupied state, and then the user agent process performs signaling interaction to try to establish a call connection to the called user.

When a SIP telephone terminal receives a call for a user, the main control process judges whether the telephone terminal is in an occupied state, and when the telephone terminal is not in an occupied state, determines the user ID of the user, and dispatches the call corresponding to the user according to the user ID The user agent process records that the telephone terminal is in an occupied state, and the user agent process performs signaling interaction and establishes a session channel.

The overall process of the present invention has been described above, and the registration process of the user, the processing process of the SIP telephone terminal as the calling party and the processing process of the SIP telephone terminal as the called party are explained respectively below in conjunction with Fig. 2, Fig. 3 and Fig. 4.

In the embodiment of the present invention, the SIP telephone terminal has a display screen, such as a liquid crystal (LCD) display screen, etc., and the display screen can display information related to user registration and calls.

Figure 2 shows the user registration process. As shown in FIG. 2 , before the user registers, the public user interface is first displayed on the display screen, and the public user interface includes a button for adding a user. In step 201, the user selects the Add User button to request to register a new user on the SIP phone terminal. Then in step 202, a new user setting interface is displayed on the display screen, requiring the user to input user information and SIP server information. The user information here includes at least the user identification, that is, the E164 number or the URL address, and of course the user can set these two items at the same time. In addition, the user information may also include a distinctive ringtone set by the user, so as to distinguish it from the ringtones of other users registered on the same SIP phone terminal. User information can also include user password, incoming call password and operation interface password etc., wherein user password is the password that the user can use this SIP telephone terminal to set, and incoming call password is the password that requires user to input when answering the phone, The operation interface password is the password that the user is required to enter when going off-hook to enter the user operation interface. Of course, it can be understood that the three passwords may be the same or different. In order to prevent users from setting wrong passwords due to negligence, all passwords need to be confirmed twice.

In addition, a smart card reader can also be integrated in the SIP phone terminal, so that the user does not need to temporarily input, but inserts the smart card containing user information into the smart card reader of the SIP phone terminal, and then the smart card reader extracts the data stored in the smart card. User information and send it to the main control process.

In step 203, after the user confirms the input, whether the main control process of the SIP phone terminal checks the user's input information is complete and legal, if yes, executes step 204, otherwise returns to step 202, that is, re-enters the new user setting interface, and then The user can then re-enter the user information.

In step 204, the master control process creates and allocates an independent user agent process for the newly added user, and then allocates corresponding resources for the user agent process, such as memory space for storing the user information and status, and so on. After that, the master process notifies the user agent process to start running.

In step 205, the user agent process registers the terminal with the SIP registration server in the network on behalf of the user.

In step 206, the SIP registration server in the network judges whether the user's registration is successful, if yes, execute step 207, otherwise execute step 208 and subsequent steps.

In step 207, the display screen displays the dedicated interface to which the user belongs, through which the user can make calls and perform user settings. Of course, if an operation interface password is set in step 202, the user agent process prompts the user to input the operation interface password before displaying the user's dedicated interface, and judges whether the user input is correct after the user inputs. And only when the user input is correct, the dedicated interface to which the user belongs is displayed.

In step 208, the user agent process of the SIP telephone terminal sends a corresponding prompt message to the user after receiving the message that the user failed to register from the network, for example, displays a notification of the failed registration to the user on the display screen.

In step 209, the user agent process of the SIP phone terminal judges whether the user has given up the registration, if yes, execute step 210, otherwise execute step 211. Here, judging whether the user gives up the registration is, for example, judging whether the user has selected the give up button on the display screen.

In step 210, if the user does not give up the registration within the predetermined time, the user agent process of the SIP phone terminal further determines whether the user needs to re-enter information, for example, the user selects the button for re-entering information. If so, go back to step 202, that is, re-enter the new user setting interface, and then the user re-inputs the address of the SIP server, for example, and then executes step 203 and its subsequent steps again. If the user does not choose to re-input, step 211 is also performed.

In step 211, the main control process cancels the user agent process of the user, and then the display screen enters the common main interface.

So far, the user registration process is completed. For each new user, the master control process creates and allocates an independent user agent process for it, and allocates corresponding resources. When a registered user logs out, the master control process revokes the user agent process of the user and releases corresponding resources.

Fig. 3 shows the processing procedure of the SIP telephone terminal as the calling party. In step 301, when the user goes off-hook, the main control process of the SIP telephone terminal prompts the user to input the user name and user password through the display screen, and then in step 302, it is judged whether the user password input by the user is correct. If yes, execute step 303 and its subsequent steps, otherwise return to step 301 and require the user to re-input the user name and user password.

In step 303, the main control process sets the current SIP phone terminal as occupied.

In step 304, the main control process determines the user ID, and schedules the user agent process corresponding to the user. Here, determining the user identity is determined by analyzing the calling address information in the INVITE request initiated by the calling user.

In step 305, the user agent process waits for the user to dial, and enters the call processing flow after the user dials. The call processing flow here is the same as that of the existing SIP telephone terminal, and will not be repeated here.

The above describes the situation that the SIP telephone terminal is the calling party. If the SIP telephone terminal is the called party, its processing flow is shown in FIG. 4 .

First, in step 401, after the main control process of the SIP telephone terminal detects that a call is incoming, it checks the occupation status of the telephone terminal.

It has been explained above that if a SIP telephone terminal initiates a call as the calling party, for example, user A registered on the SIP telephone terminal initiates the call as the calling party, the main control process will record that the terminal is in the occupied state, and at this time when another user C When another user B registered on the SIP telephone terminal where user A is talking is called through another SIP telephone terminal, the SIP telephone terminal will detect that the telephone terminal is in an occupied state. In addition, if user A is using the SIP phone terminal as the called party to make a call, the main control process will also record that the terminal is occupied. Similarly, when another user C calls the SIP phone terminal where user A is talking through another SIP phone When another user B is registered on the telephone terminal, the SIP telephone terminal will also detect that the telephone terminal is in an occupied state. Correspondingly, no matter whether it is the calling party or the called party, when the user ends the call, the main control process will set the terminal to an idle state.

In step 402, the main control process judges whether the telephone terminal is occupied according to the detection result. If not occupied, execute step 403 and its subsequent steps, otherwise execute step 406 and its subsequent steps.

In step 403, the main control process determines the called party's identity according to the called party's address information in the received INVITE request, sets the telephone terminal to an occupied state, and then invokes the user agent process corresponding to the called party.

In step 404, the user agent process rings with the distinctive ring tone set by the user, displays the calling information and called information on the display screen, and waits for the called user to answer.

In step 405, when the called user goes off-hook to answer, the user agent process performs signaling interaction and establishes a session channel with the calling user. After that, when the called user hangs up to end the call, the main control process will set the telephone terminal to an idle state.

In step 406, if the main control process judges that the telephone terminal is being occupied, for example, user A is talking, then the main control process prompts user A to have a new call incoming for user B, and then displays the corresponding operation on the terminal display screen The interface is for user A to choose. In this embodiment, user A has three options: rejecting the new call, maintaining the current call and ending the current call.

In step 407, the main control process judges the content selected by user A after user A has selected, if it is to reject the new call, execute step 408; if it is to maintain the current call, execute step 409 and its subsequent steps; if it is to end the current call , execute step 412 and subsequent steps.

In step 408, if user A chooses to reject the new call, the main control process schedules the user agent process of user B, and the user agent process sends a response message indicating that the called SIP telephone terminal is busy to the calling user. During this process, user A continues the call, and sets the SIP terminal to an idle state after the call ends.

In step 409, if user A chooses to hold the current call, the main control process dispatches the user agent process of user B, which rings to user B, and displays the calling information and called information on the display screen, waiting for user B answer. In step 410, user B inputs the incoming call password to answer the call, and after inputting the operation interface password, the display screen displays user B's operation interface, then user B picks up the phone to answer, and user B's user agent process establishes a conversation channel. In step 411, after user B ends the call, the session channel established for user B's call is removed, and then the user agent process of user A is dispatched, and the user agent process of user A continues the call processing of user A.

In step 412, if the current user chooses to end the current call, the main control process dispatches the user agent process of user B, and the user agent process of user B rings to user B, and displays the calling information and called information on the display screen, and waits User B answers. In step 413, user B inputs the incoming call password to answer the call, and after inputting the operation interface password, the display screen displays user B's operation interface, then user B picks up the phone to answer, and user B's user agent process establishes a session channel. In step 414, the session channel is removed after user B stops talking, and the SIP terminal is set to an idle state.

In this way, the present invention provides a flexible processing method for the user when the SIP telephone terminal is called, and solves the coordination problem of different users' conversations that is easily caused by multiple users registering on the same SIP telephone terminal.

Of course, user B here can also be user A himself, that is to say, when user A is talking, another user C may also wish to talk with user A, which means that user A can find that there is a new incoming call, And the called party who should make the incoming call is himself. Similar to the above embodiment, user A can also have three options, except that the main control process will not schedule a new user agent process, but the original user agent process will continue to perform new processing.

In addition, in order to simplify the process, it is also possible not to provide user A with a choice in step 406, but when the SIP phone terminal is in an occupied state, the main control process directly schedules the user agent process of user B, and the user agent process of user B A response message indicating that the called SIP telephone terminal is busy is sent to the calling user, for example, a "486 response".

As mentioned above, the user information may contain an operation interface password. The purpose of setting the operation interface password is to prevent misoperation or stealing between users. For example, user A uses user B's identity to operate or communicate. In the case that the operation interface password is set, when the SIP telephone terminal is in the static waiting state, the display screen displays the common main interface shared by all users. When the user does not go off-hook, but directly operates through the terminal keyboard, the main control process only allows the user to operate on the public main interface, for example, the "add new user" operation belongs to the public main interface. Regardless of whether the user is the calling party or the called party, when the user picks up the phone, a prompt interface prompting the user to input or select the user name and the password of the operation interface will be displayed on the display immediately, and then the main control process will verify whether the user input is correct. If it is correct, the user operation interface is displayed, and only then can the user perform operations such as dial-up calls or user attribute settings. After the user hangs up or completes the setting operation, the display interface on the display screen returns to the public main interface immediately, and if the user goes off-hook, he needs to input the user name and the password of the operation interface again.

Therefore, it can be understood that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall include Within the protection scope of the present invention.

Claims (10)

1. A user registration and conversation method of a session initiation protocol SIP telephone terminal, comprising at least: a. set a main control process and more than two user agent processes in the embedded system of the SIP telephone terminal; b. When a user utilizes the SIP telephone terminal to register, the master control process assigns an independent user agent process for the user after receiving at least user information including user identification, and assigns a system corresponding to the user agent process resource; c. When a registered user operates a SIP telephone terminal to initiate a call, the main control process determines the user identification of the registered user, dispatches the user agent process corresponding to the registered user according to the user identification and records that the telephone terminal is in an occupied state, and the user The agent process performs signaling interaction to try to establish a session channel; When a SIP telephone terminal receives a call for a registered user, the main control process judges whether the telephone terminal is in an occupied state, and when the telephone terminal is not in an occupied state, determines the user ID of the registered user, and schedules a corresponding call according to the user ID. The user agent process of the registered user records that the telephone terminal is in an occupied state, and the user agent process performs signaling interaction and establishes a session channel. 2. The method according to claim 1, characterized in that, before the main control process receives the user information in step b, it further comprises: the main control process prompts the user to input user information, and the receiving user information is received by the user through a SIP phone terminal input Information. 3. The method according to claim 1, characterized in that, the method further comprises the step of integrating a smart card reader in the SIP telephone terminal, and before the main control process receives user information in step b, it further comprises: the main control process prompts The user inserts a smart card containing user information, and the receiving user information is to extract the user information in the smart card by a smart card reader. 4. method according to claim 1, it is characterized in that, the user information in the step b comprises ringing information, after master control process distributes an independent user agent process for this user, further comprise: described user agent process saves user agent process The ringing information set; In step c, when the SIP telephone terminal receives a call for a registered user, after the master control process dispatches the user agent process corresponding to the registered user, it further includes: The user agent process rings according to the preset ringing information of the registered user. 5. The method according to claim 1, wherein the SIP telephone terminal includes a display screen, and when the SIP telephone terminal receives a call for a registered user in step c, the main control process schedules the corresponding After the registered user's user agent process further includes: The user agent process displays the identification information of the registered user on the display screen of the SIP telephone terminal. 6. The method according to claim 1, wherein the step b user information includes the incoming call password set by the user, and in the step c, when the SIP telephone terminal receives a call for a registered user, the master control process scheduling Further include after the user agent process corresponding to the registered user: the user agent process rings the user, and prompts the user to input the incoming call password, and judges whether the user input is correct after receiving the incoming call password input by the user, and if so, proceeds Signaling interaction and session channel establishment; otherwise, end this process. 7. The method according to claim 1, characterized in that, in step c, when the SIP telephone terminal receives a call for a registered user, when the master control process judges that the telephone terminal is in an occupied state, the master control process schedules the registration A user agent process of the user, the user agent process sends a response message indicating that the called SIP telephone terminal is busy to the calling user. 8. The method according to claim 1, characterized in that, after the main control process judges that the SIP telephone terminal is in the occupied state in the step c, further comprising: The main control process prompts the first registered user to enter the new call and prompts the first registered user to select one of the following three items: rejecting the new call, maintaining the current conversation and ending the current conversation; the first registered user is currently occupied Registered users of the above-mentioned SIP telephone terminal; When the first registered user selects to reject the new call, the master control process dispatches the user agent process of the second registered user, and the user agent process sends a response message indicating that the called SIP telephone terminal is busy to the calling user; the second registered user For the currently called registered user; When the first registered user chooses to keep the current conversation, the main control process dispatches the user agent process of the second registered user, and the user agent process rings the second registered user, and establishes a conversation channel after the second registered user answers, and at the After the two registered users stop talking, remove the conversation channel, then dispatch the user agent process of the first registered user, and continue the conversation processing of the first registered user by the user agent process of the first registered user; When the first registered user chooses to end the current conversation, the main control process dispatches the user agent process of the second registered user, and the user agent process rings the second registered user, and after the second registered user answers, the conversation channel is established, and at the After the second registered user stops talking, the conversation channel is removed. 9. The method according to claim 1, wherein the user information of step b includes the user interface password provided by the user, and the SIP phone terminal includes a display screen, and the display screen is displayed when the SIP terminal is in a waiting state The public main interface, and when the user goes off-hook, prompts the user to input the password of the operation interface on the display screen, displays the user operation interface corresponding to the user after judging that the password entered by the user is correct, and displays the public main interface again after the user hangs up. 10. The method according to claim 1, characterized in that, the method further comprises: when the registered user of the SIP telephone terminal logs out, the master control process cancels the user agent process allocated for the registered user, and releases the System resources allocated by this registered user agent process.

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