CN1809099B - Number priority based method of forced disconnecting calls - Google Patents

Abstract

This invention provides one method based on number priority calling and to the sound system based on internet and one control method between the interface gate and servo. This invention matches phone number priority through servo with strong dissemble function interface network gate through getting number priority and the network gate judges the calls number priority to achieve sound system interfacing method. This invention is of IP telephone system number to provide one priority to realize network all phone number and IP calls to support priority plug to ensure the emergency call normal on VOIP network.

Description

A method of forcibly demolishing a call based on number priority

technical field

The invention relates to an Internet-based voice system, in particular to a control method between a voice access gateway and a server.

Background technique

In some existing government departments, such as courts, public security, military, etc., in order to ensure the smoothness of some emergency calls due to safety and emergency considerations, there must be some mechanism to realize the forced demolition function, that is, when the called number When the line is busy, the emergency calling number can disconnect the current call of the called number and preempt the conversation with the called number.

In the current VOIP (voice over Internet) network composed of gateways and gatekeepers, as shown in Figure 1, for the VOIP gateway GW1, A, B, and C three phones are called internal phones, and D, E, and F Both are called external telephones; on the one hand, GW1 can communicate with telephone D connected to PBX (program-controlled exchange) in PSTN (public switched telephone network) through external lines (generally FXO, E1 and other interfaces), or through IP network and gateway GW2 talks to phone F; GW1 supports the function of forcibly tearing down an existing call and inserting a new call. The solution usually used to implement the forced demolition function on GW1 is: configure the priority of the internal line calls A, B, and C, which is the priority of the corresponding internal line port; since GW1 cannot directly manage the number, for the external line access phone D, then Configure the corresponding external line port priority of GW1, but this port can correspond to multiple incoming calls from different numbers such as E and D. Assume that the priority of phone C is higher than that of A and B; the priority of the incoming call port corresponding to D is also higher than that of A and B. When phones A and B are talking, C calls A. Since C has a higher priority, GW1 connects to AC to make a call, and plays a busy tone to B or hangs up. This situation is called an internal line forced release; when D calls A, because the external line port that D calls in has a high priority, GW1 connects to AD and plays a busy tone to B. Or hang up, which is called outside forced demolition.

It can be seen from the above examples that in the current VOIP network, the automatic forced demolition service based on number priority has the limitation that the phones corresponding to these numbers are required to be in the same VOIP gateway. Forcible demolition by level or physical port, not by number. If it is necessary to implement forced demolition for all incoming calls according to the number, manual intervention is required, which wastes labor costs to a certain extent. In addition, for phone F in the VOIP network, since the priority cannot be configured on GW1, the call on GW1 cannot be forcibly released.

Contents of the invention

The present invention solves the problem that the existing VOIP system cannot provide automatic disconnection of the current call of the called number and access to a new call according to the emergency calling phone number in the entire network, and provides a method according to the priority of the phone number, so that emergency calls can be prioritized A method for accessing an existing voice system.

The present invention proposes a scheme in the VOIP system based on the priority of the telephone number to both parties who are talking, as shown in Figure 2, including the following steps:

a) Define a priority list of phone numbers;

b) Configure the defined number priority list to the call server;

c) the access gateway with the forced demolition function obtains the priority list in step b);

d) When a user requests to call in the user number that the gateway of this station is talking to, the gateway queries the priority list and makes a judgment. When the priority of the calling number is higher than the priority of the user number that is talking with the called party, enter step e) , otherwise go to step f);

e) The calling user disconnects the current call of the called number;

f) The calling user calls waiting or hangs up.

Further, in step e), if the called number has a call waiting function, the calling user dials according to the prompt tone to choose whether to enter the forced demolition or enter the call waiting process in step f).

Wherein, the access gateway in step c) can serve as a call server at the same time. In addition, the number priority list obtained by the access gateway in step c) can be updated in real time.

For step d), when the access gateway does not find the required priority information in the priority list, the number is defaulted as the lowest priority.

In addition, in step e), the calling user compares the priority of his number with the priority of the called number according to the situation before disconnecting the current call of the called number.

Beneficial effects of the present invention: provide unified priority for IP telephone system telephone numbers, thereby realizing that all telephones dialed into the network or all telephones in the IP network support forced removal and forced insertion according to priority, and unified deployment of the entire network, Guarantee the unimpeded flow of important emergency calls on the VOIP network.

Description of drawings

FIG. 1 is a schematic diagram of a prior art network with a forced demolition function.

Fig. 2 is a flowchart of the present invention.

Fig. 3 is a schematic diagram of a network according to an embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. In the present invention, the call server is not restricted to use any hardware platform, and logically can be H.323 gatekeeper, soft switch, SIP server, VOIP gateway, etc. in the VOIP network.

The specific H.323 network architecture is taken as an example for illustration. As shown in Figure 3, the gatekeeper acts as a call server, phone A is a user of gateway 1, phone B is a user of gateway 2, and phone C and fixed phone D are users of gateway 3. Gateway 1, gateway 2, and gateway 3 are all registered on the gatekeeper, first configure the number priority list on the gatekeeper, that is, configure the number and its corresponding priority. These numbers can be telephone numbers within the IP telephone network, or fixed telephone numbers outside the IP telephone network, mobile phone numbers, PHS numbers, etc. The phone number that needs to be demolished needs to define the priority. This phone number range includes all valid numbers, and the priority of the number can be defined: 1, 3,...n, the larger the number, the lower the priority. During implementation, if a certain telephone number has no priority defined, its priority is the lowest priority by default, and the number priority is configured on the call server gatekeeper. Gateway 1, Gateway 2, and Gateway 3 with the forced demolition function enabled will send IRQ messages to the gatekeeper respectively to obtain the number priority list on the server. After the gatekeeper receives the IRQ message from the gateway, it will send the configured number priority list to the gateway in turn through the IRR message; the gateway will reacquire the list from the gatekeeper through the IRQ message at regular intervals to ensure that the priority list is up-to-date of.

After completing the above steps, if A and B are talking, user C or D initiates a call to user A through the IP network. Gateway 1 will query the user number priority list obtained from the server on the gatekeeper. If the number priority of C is found to be higher than that of B and A, C will directly disconnect the call from AB, and A and B will hear a prompt to forcibly disconnect If A has the call waiting function, C can also dial according to the prompt tone to choose whether to enter the forced demolition or call waiting process. When the number priority list of the gatekeeper changes, the gatekeeper can actively send an IRR message to gateway 1, gateway 2, and gateway 3 to notify the gateway of the latest priority list.

In an environment where user priorities are strictly controlled, the present invention can provide services for distinguishing priority users. High-priority phone users can directly disconnect calls from low-priority users and talk to one of them. In emergency situations, special calls are made with the highest call priority, so as to ensure that emergency situations and orders can be quickly transmitted throughout the network. The present invention is not limited to the H.323 network architecture, and all forced demolition functions realized by the thought of the present invention belong to the protection scope of the present invention.

Claims (6)

1. the method based on the number priority forced disconnecting calls is characterized in that, comprises the steps:

A) priority list of definition telephone number;

B) configuration step a) defined priority list to call server;

C) have the IAD obtaining step b of the function of tolling breakdown) in priority list;

D) when the user asks Subscriber Number that incoming call this TV station gateway conversing, gateway inquiry priority list also judges, enters step e) when calling number priority is higher than with the called Subscriber Number priority of conversing, otherwise enters step f);

E) calling subscriber removes the current talking of called number;

F) calling subscriber's Call Waiting or on-hook.

2. according to claim 1 based on the method for number priority forced disconnecting calls, it is characterized in that, in the described step e), if called number has call waiting function, the calling subscriber dials according to prompt tone and selects to enter the Call Waiting flow process of tolling breakdown or entering in the step f).

3. according to claim 1 based on the method for number priority forced disconnecting calls, it is characterized in that in the described step b), IAD is simultaneously as call server.

4. according to claim 1 based on the method for number priority forced disconnecting calls, it is characterized in that in the described step c), the priority list that IAD obtains can real-time update.

5. according to claim 1 based on the method for number priority forced disconnecting calls, it is characterized in that in the described step d), when IAD was not found the precedence information of current number in priority list, giving tacit consent to this number was lowest priority.

As described in the arbitrary claim of claim 1-5 based on the method for number priority forced disconnecting calls, it is characterized in that in the step e), the calling subscriber removes before the current talking of called number, its number priority and called number priority be compared.

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