Method for providing ring back tone
A technology of ringback tone and called user, applied in the direction of automatic exchange, telephone communication, electrical components, etc., can solve the problem of not being able to provide differentiated services for users of different brands
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no. 1 Embodiment
[0047] refer to figure 1 , this figure is the flow chart of the first specific embodiment of the method that the present invention provides ring-back tone, specifically mainly comprises the following steps:
[0048] Step 11, the calling switch judges whether the called user is idle, if so, then executes step 12, otherwise, executes step 18, during specific implementation, the calling switch obtains the roaming number of the called user from the called switch through the location server; The switch judges whether the called user is free by using the roaming number through the called switch, and after judging yes, sends the numbers of the calling and called users to the service switching point;
[0049] Step 12, sending the calling and called user numbers of the current call to the service switching point;
[0050] Step 13, the service switching point detects whether a ring-back tone access code is carried in the called number, if so, then perform step 14, otherwise, perform st...
no. 1 Embodiment
[0056] It should be noted that the ring back tone defined in the present invention is the personalized ring back tone customized by the user, that is, the commonly described ring back tone, and the service exchange point in the present invention can adopt the gateway mobile switching center in the specific implementation system in addition (GMSC) or other node equipment with the function of service switching point, the following will take the system including GMSC as an example to illustrate, refer to figure 2, this figure provides the first specific embodiment system networking schematic diagram of the method for ring-back tone provided by the present invention, and this system comprises:
[0057] The calling switch (OMSC) is used to connect with the called end office and service switching point through ISUP / TUP;
[0058] The called switch (VMSC), the called end office where the CRBT user B is located, is responsible for accessing the called user B, and returns the status of...
no. 2 Embodiment
[0094] refer to Figure 4 , this figure provides the second specific embodiment flowchart of the method for ring-back tone for the present invention, specifically comprises the following steps:
[0095] Step 21, the calling switch judges whether the called user is free, if so, then executes step 12, otherwise, executes step 28, during specific implementation, the calling switch obtains the roaming number of the called user from the called switch through the location server; The switch judges whether the called user is free by using the roaming number through the called switch, and after judging yes, sends the numbers of the calling and called users to the service switching point;
[0096] Step 22, sending the calling and called user numbers of the current call to the service switching point;
[0097] Step 23, said service switching point detects whether a ring-back tone access code is carried in said called number, if so, then perform step 24, otherwise, perform step 27;
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