A call box is a device used to make a call for emergency services in public places such as streets, highways, and public parks. However, there are several synonyms for call box such as emergency telephone, emergency phone, SOS phone, help phone, distress phone, and panic phone. These devices are strategically placed in areas where people might require assistance urgently. They are often bright red and have a distinctive shape to make them easily identifiable. Emergency services can be reached by simply lifting the receiver, and the call is automatically directed to the nearest control center. These synonyms are used interchangeably depending on the region or context.