Unsecured SIP is still common in harsh sites. One misconfigured switch or a tapped cabinet

A Zone 1 phone can be online and still sound broken. Voice packets fight with

A Zone 1 hazardous area classification 1 phone can be certified and still go offline

Downtime in hazardous areas is expensive. A dead phone can also become a safety incident.

ESD can reset or kill an Ex telephone in one touch. In hazardous areas, that

Lightning does not need to hit the phone to kill it. A nearby strike can

A certified Ex telephone can still fail an audit if the grounding is weak. One

A certified Ex telephone can still become a site risk if the cable entry is

Coastal air can ruin outdoor phones faster than rain. Corrosion starts at tiny edges, then

The choice between NPT and Metric threads is not a matter of "better" or "worse";