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2. The network shielded wire must be connected to the weak grounding point in the general control room.
3, before the call for each door host code, can not be repeated.
4. When the residential building intercom system cannot work, you should check whether the D1 and D2 data lines are wrong. 
5, under normal circumstances, the network data line D1 has a voltage of about 2.3V, D2 has a voltage of about 2.7V, D1, D2 voltage is usually changed between 2-3V. If the voltages of D1 and D2 are the same, the joint building network intercom system cannot operate. When calling and talking, audio A1 and ground have 5.6-6V voltage. If the above parameters are not normal, it is necessary to check the relevant lines.
6, on the cell door less host cell, if the device and the line is correct, but after power on the transaction machine can not work, you can leave the nearest airport host computer, relay isolator, connect their lines, its Above removed, unit test.
7. Regarding the larger cells that surpass the host of 24 cell gates, disconnect the network bus on the cell center trunk isolator first, and access the transponder on the central relay isolator to recognize that the fault is not in the central relay isolator. Before and after, find the test sequentially.
After completing the installation and commissioning of the above residential community building intercom network system , if there are doubts, it is recommended that you contact the manufacturer.
Keywords: community building intercom community building intercom network system
Attention to the installation of residential building intercom networking system 1. Before commissioning, it is necessary to check whether the wiring of the networking bus and each trunk isolator is wrong, and the contact is not solid.