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Choosing the wrong equipment for a hazardous area can create safety risks, failed inspections, and costly downtime. ATEX ratings help you select devices that are certified for specific gas or dust zones and specific protection levels. This article from Joiwo will explain the ins and outs of the ATEX directive, including zones, equipment categories, and…

Oil rigs are dangerous industrial environments with constant flammable gas and vapor, and standard communication devices that create heat or electrical arcs during operation are a major hazard in such a scenario. Therefore, explosion proof telephones on oil rigs have become a necessity for oil & gas operations. In this article, we at Joiwo will…

Ningbo Joiwo’s  Inmate & Prison & Jail  vandal resistent armored rugged Telephone System is a full solution including the prison telephone, office control telephone，circuits, monitoring and recording system, call-control system, secure database, PA system, control station, printers, and associated software. Joiwo could provide the supports all prison equipment system to satisfied our customers’ demand. So how does the inmate…

IP rating is also known as Ingress Protection or International Protection ratings which are defined to the international standard of EN 60529 (British BS EN 60529:1992, European IEC 60509:1989). These standards are used to define the levels of sealing effectiveness of electrical enclosures against intrusion from foreign bodies such as dirt and water. The rating…

1.Overview Analog phonesystem – also commonly known as Plain Old Telephone Service (POTS) – that carries voice signals over copper wires . VoIP technology transmits voice traffic over Internet in the form of data packets . 2.Phone cost Analog telephone cheaper than voip telephone 3.System cost Analog:In addition to the PBX host and external line cards, a large number…

Nowadays, we may use elevators wherever we go, such as office buildings, hospitals, shopping malls, schools, residential quarters, etc. In the elevator, the floor buttons of the elevator are usually used, and the emergency calls in the elevator are often ignored and do not know how to use them. However, there is often no signal…