Fixed telephone terminal emergency call ringing system and method
A terminal and incoming call technology, applied in the field of communication, can solve problems such as missing phone numbers
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Embodiment 1
[0040] Such as figure 1 As shown, the emergency ringing system for a fixed-line terminal provided in this embodiment includes a display module, a horn, and a connected ringing oscillating signal generating module and a coupling circuit; the ringing oscillating signal generating module generates a ringing After the oscillating signal is stepped down by a coupling circuit; it is characterized in that it also includes: a rectification circuit, an MCU and a system motherboard; the MCU includes a communication module and a decoding module and a signal conversion module connected to the communication module; the decoding module is used for decoding The ptsn signal is used to obtain the caller number signal; the rectification circuit is used to rectify the ringing oscillating signal after the coupling circuit is stepped down to obtain a ringing square wave signal; the signal conversion module is used to convert the ringing square wave signal into a ringing signal ring digital signal;...
Embodiment 2
[0045] Such as figure 2 As shown, a method for ringing an emergency call at a fixed-line terminal provided in this embodiment includes:
[0046] Incoming calls from fixed-line terminals;
[0047] The decoding module decodes the ptsn signal to obtain the caller number signal;
[0048] The ringing oscillating signal generating module generates the ringing oscillating signal;
[0049] The coupling circuit depressurizes the ringing oscillating signal;
[0050] The rectification circuit rectifies the reduced ringing oscillating signal to obtain a ringing square wave signal;
[0051] The signal conversion module converts the ringing square wave signal into a ringing digital signal;
[0052] The communication module transmits the incoming call number signal and the ringing square wave signal to the system main board;
[0053] The system board judges whether to receive the caller number signal and the ringing square wave signal within the preset time threshold; when receiving th...
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