WiFi Hazardous Area VoIP Paging Telephone and System

摘要

VoIP-based telephone is provided with integral paging amplifier and a WiFi antenna, and is designed for hazardous areas such as UL Class I, Division 1, Division 2 and IEC Ex including the WiFi antenna. A system of VoIP-based telephone units supports multicast to provide prioritized and loudspeaker-zoned paging. The integral 30-watt class D amplifier in the telephone units provides sufficient volume for paging and ringing to be reliably detected by personnel in hazardous locations. Upon lifting the handset, the telephone unit can automatically revert to standard VoIP telephone operation. The telephones can be powered via DC, AC or with Power over Ethernet (POE).

主权项

1. A voice over internet protocol (VoIP) unit comprising:
a VoIP control module for VoIP operations among VoIP units that is configured to selectively establish peer-to-peer communication between the VoIP unit and another one of the VoIP units, and multicast paging among a plurality of the units; a WiFi antenna configured for operation in a hazardous area in compliance with the one or more hazardous area standards; a WiFi interface module connected to the VoIP control module and the WiFi antenna and configured to exchange bi-directional Ethernet data between the antenna and the VoIP control module; and an enclosure configured to comply with one or more hazardous area standards and enclose the VoIP control module and the WiFi interface module; wherein the antenna is mounted on the exterior of the enclosure through an opening therein and pressure fitted within the opening to create a flame path that retains the compliance of the enclosure with the one or more hazardous area standards when the antenna is deployed in the opening.