Building inter-speaking system and method
A technology of building intercom system and corresponding relationship, applied in the field of communication, can solve the problems of no function refresh, inconvenience, trouble, etc., and achieve the effect of good maintainability, convenient function upgrade and investment reduction.
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[0016] The embodiment of the present invention utilizes the dial-up call function provided by the traditional fixed telephone network to connect the outdoor unit and the indoor unit through the PSTN network. Each indoor unit corresponds to a short number and a network access number, and the outdoor unit corresponds to a network access number. The network access number and the network access number of the indoor unit are set as a cluster, and only the short numbers in the cluster can be dialed through the outdoor unit. In this way, when the outdoor unit dials the short number corresponding to the indoor unit, the intelligent service switching center obtains the corresponding network access number according to the short number, and then connects the call to the indoor unit corresponding to the network access number through the PSTN network. When the outdoor unit and the indoor unit are connected, the door can be opened through the special key on the indoor unit.
[0017] In orde...
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