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The telephone types of the subway official telephone system mainly include dispatch telephones, inter-station traffic telephones, in-station telephones, and vehicle base station telephones.
The emergency telephone system is an IP emergency system specially set up in the subway. The emergency system is a complete communication system. The communication system centrally manages the emergency help point on the platform, the waterproof and anti-electromagnetic interference telephone in the tunnel, and the subway elevator intercom.
The emergency intercom is a part of the on-board broadcast, which consists of four parts: train broadcast, head-to-tail intercom, passenger emergency intercom, and line-adjustment intercom.
