News & field notes

What we learn on site, written down.

Practical notes on industrial telephony, IP networks and explosion protection, from the people who build the equipment.

11 articles 5 topic areas Since 2011 in the field

The Pulse of Industrial Digitalization: How SIP Works in Industrial Environments

A plain-language guide to the signaling layer behind industrial VoIP: how SIP sets up a call, and why it matters when the site is a chemical plant or a mine.

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More field notes.

Emergency telephone installed at an industrial campus

Emergency systemsMar 27, 20262 min read

Industrial Emergency Communication Systems: Architecture and Integration

The hardware, protocols and redundancy that keep an emergency call connected in tunnels, plants and public spaces.

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IP phone server hardware for an industrial communications network

SIP & networksFeb 25, 20262 min read

The Digital Nerve Center: Why IP Phone Servers Are the Silent Heroes of Industry

The server is the part nobody photographs. Here is what an industrial IP PBX does, and why an office VoIP box is not a like-for-like substitute.

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Range of industrial telephones in different enclosure materials

Materials & IP ratingsFeb 2, 20262 min read

What Are the Common Materials Used for Industrial Telephones?

Stainless steel, aluminum alloy, cold-rolled steel or GRP: how the enclosure material decides where a phone can survive.

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Stainless steel cleanroom intercom station

CleanroomsJan 19, 20262 min read

Silent Connectivity: How Cleanroom Intercom Systems Redefine Communication in Controlled Environments

Flush panels, non-porous surfaces and DSP audio keep cleanroom teams in contact without breaking contamination control.

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Waterproof industrial telephone being sprayed with water

Materials & IP ratingsJan 16, 20262 min read

Understanding IP Protection Ratings: What They Mean and Why They Matter for Waterproof Telephones

What the two digits after IP actually mean, from IP65 outdoor enclosures to IP67 temporary immersion.

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ATEX and IECEx certification marks for explosion-proof equipment

Explosion protectionJan 13, 20263 min read

International Explosion-Proof Standards for Industrial Telephones

IECEx, ATEX and the North American Class/Division system, compared for specifiers of explosion-proof telephones.

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Network infrastructure supporting industrial emergency communications

SIP & networksJan 12, 20262 min read

How IP Networks Support Urban Emergency Communication

How a single IP server lets distant call points and control rooms talk without a dedicated cable run.

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Stainless steel industrial telephone on a dark background

Materials & IP ratingsNov 5, 20252 min read

IP Ratings for Industrial Phones: What the Numbers Mean

IP65, IP66 and IP67 look similar on a datasheet. The difference is water pressure and immersion time.

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Red explosion-proof telephone with sound and light signals

Explosion protectionAug 27, 20252 min read

What Is an Explosion-Proof Telephone?

A guide to what explosion-proof telephones are, how their enclosures are built, and how they are installed.

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Industrial site requiring explosion-proof communication equipment

Explosion protectionAug 12, 20252 min read

Explosion-Proof Intercom Phones and Explosion-Proof Ratings

The working principle behind explosion-proof intercoms, where they are required, and how to read their ratings.

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