Explosion proof emergency telephone with stainless steel enclosure, suitable for hazardous environments, featuring a speaker grille and robust design.

Explosion proof emergency telephone with stainless steel casing and dual cable connections, designed for hazardous environments.

Stainless steel explosion-proof emergency telephone box with speaker and connectors, designed for hazardous environments.

Explosion Proof Handsfree Speed Dial Emergency Telephone JWBT831

The JWBT831 analog explosion-proof emergency telephone is built for hazardous industrial zones, featuring a robust 304 brushed stainless-steel enclosure that runs directly on phone line power with no external supply needed. It delivers full-duplex hands-free communication with an integrated high-power loudspeaker for loud environments, alongside a single pre-set speed-dial button easily operable even with heavy safety gloves. Seamlessly compatible with traditional analog PBX, PABX, and industrial dispatch host systems, it provides reliable emergency communication for offshore platforms, petrochemical plants, refineries, mines, and port terminals.

Widely used in：

MARINE ENVIRONMENT

HIGHWAY SHOULDER

SUBWAY STATION

TUNNEL

UNDERGROUND FACILITY

RAILWAY PLATFORM

MINING SITE

OTHERS

KEY FEATURES

Rugged & Certified Protection

304 Stainless Steel: Shockproof, anti-rust, WF2 salt-spray resistant, and IP66 rated for extreme corrosive and seaside areas.
Explosion-Proof: ATEX/IECEx certified for Zone 1 & 2 gas locations with compliant explosion-proof cable glands.

Line-Powered & Retrofit-Ready

No External Power: Runs directly on analog PSTN/PBX lines to streamline wiring and installation.
System Compatible: Fully integrates with legacy analog dispatch hosts; wall-mounted for quick retrofits.

Hands-Free & High-Noise Audio

One-Touch Speed Dial: Single button instantly dials a pre-set hotline, fully operable with heavy gloves.
Industrial Noise Reduction: Full-duplex hands-free operation with a high-power speaker and echo cancellation for loud plants.

Optional Features

External beacon/warning light output, auto-hang-up timer, and line surge/lightning protection.

Item	Technical data
Explosion-Proof Mark	Ex d ib IIC T6 Gb/EX tD A21 IP66 T80℃
Voltage	Phone Line Powered
Standby Work Current	≤0.2A
Frequency Response	250～3000 Hz
Amplified Output Power	10～25W
Ringer Volume	110dB(A) at 1m distance
Corrosion Grade	WF2
Ambient Temperature	-40～+60℃
Atmospheric Pressure	80～110KPa
Relative Humidity	≤95%
Lead Hole	2-G3/4”
Installation	Wall-mounted

PACKAGE

All Joiwo products are packaged in strict compliance with international transport and export packaging standards to guarantee complete physical and environmental protection during transit. Each unit is securely housed within a heavy-duty, moisture-resistant corrugated outer box, backed by customized high-density shock-absorbing foam to prevent impact damage. All shipping cartons feature clear hazard labeling, standardized handling symbols, and full regulatory documentation, ensuring seamless customs clearance and fully compliant logistics for hazardous-area equipment worldwide.

Proof Heavy Duty Telephone in Packaging for Industrial Use.

FREQUENTLY ASKED QUESTIONS

Q1: Does this analog phone need external power supply?

No. It is line‑powered, drawing power directly from analog PBX/PABX telephone line. No extra power adapter required.

Q2: What PBX systems is this analog phone compatible with?

It supports standard analog POTS / PABX / industrial scheduling host. Works with most traditional analog telephone exchange devices.

Q3: Is this unit suitable for offshore salt‑spray environment?

Yes, 304 stainless‑steel housing with WF2 anti‑salt‑spray performance, suitable for offshore & seaside projects.

Q4: How to set the one‑button hotline number?

Configure target hotline number via local hardware setting or DTMF remote programming.

Designed for high-risk industrial environments, the JWBT831 emergency telephone provides reliable, continuous communication across critical infrastructure and hazardous sites:

Offshore Platforms & Seaside Terminals: 304 stainless steel, WF2 salt-spray protection, and IP66 rating withstand harsh marine corrosion.
Petrochemical Plants & Refineries: ATEX/IECEx Zone 1 & 2 certified for safe operation in explosive gas environments.
Mines & Wastewater Plants: Glove-friendly single-button design and high-power speaker overcome heavy dust and extreme background noise.
Legacy Factory Retrofits: Line-powered operation and universal analog compatibility enable seamless, low-cost equipment upgrades.

Joiwo delivers end-to-end communication systems engineered for hazardous industrial environments, seamlessly integrating explosion-proof hands-free terminals, IP networks, communication servers, and central management consoles with optional PA and video support. Bridging field operations to central control, Joiwo provides safe, reliable, and scalable communication solutions tailored for oil & gas, chemical processing, refineries, offshore platforms, and mining facilities.