Tag: Explosionproof Speaker Phone with LCD display

28/06/2020

Main Functions of Roadside Extension/Tunnel Extension

Emergency phone users can directly communicate with the operator of the emergency phone console, and push-to-talk (easy to operate). After the user presses the extension button, the sub-unit can automatically send a call to the console host of the monitoring center, and transmit basic information such as the local kilometer mark, up-down direction, etc. Each… Continue reading Main Functions of Roadside Extension/Tunnel Extension

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