Weatherproof Telephone FernTel IP4

VoIP-Telephone for indoor and outdoor applications

With FHF approved technology, the FernTel IP4 is suitable for outside installation. It‘s the ideal weatherproof VoIP desk/wall telephone for applications in potentially harsh and rough environments in many industrial applications -– no matter if exposed to seawater, high humidity or extensive mechanical strain.

The elegant housing is manufactured from polycarbonate: an impact-resistant thermoplastic. The FernTel IP4 provides durability and longevity while minimising the need for maintenance. The FernTel IP4 provides highly effective ergonomics with an intelligent user-friendly menu structure and easy installation and maintenance.

The illuminated keypad and luminous display ensures visability in low light environments. The Ethernet connectivity with the internal 2-port switch allows the user to connect a laptop in an outdoor area which then obtains network access through the telephone. The FernTel IP4 offers high-quality features while meeting industrial standards and provides high quality communication, safely.

Ingress protection class IP 65
according to IEC60529
• ambient temperature -40°C to
• Ringing volume >= 95 dB(A) in 1 m
• Pixel-based luminous OLED display
• Illuminated keypad
• Intelligent and user-friendly menu
• VoIP Protocols: SIP, H.323 (UDP,
• Power supply: PoE or external
• Connection to 10/100
/1000-BASE-T Ethernet
• Relay built-in (SPST)
• Relay module (optional) 2x SPDT

Power supplyPower over Ethernet according to IEEE 802.3af via 48 V DC PoE power
supply (44 V min, 57 V max)
Voltage external power
22.8 VDC – 53 VDC
Power consumption4 W (POE class 0)
Connection2x RJ45 Port (10/100/1000 Mbit/s) 1x PoE
Ringing volumeMax. approx. 95 dB(A) in 1 m distance
On Board Relay (standard)
Switching voltage
AC 30 V
DC 60 V
(standard) Switching currentAC 1.0 A
DC 1.0 A
(standard) Switching capacityAC 15 VA
DC 15 W
Relay 1 and Relay 2 (optional) Switching voltage (Vswitch)AC 250 V
DC 230 V
Switching current (optional)AC 5,0 A
DC 5,0 A
Switching capacity (optional)AC Vswitch≥35V 15 VA
AC Vswitch<35V 100 VA
DC Vswitch≥50V 15 W
DC Vswitch<50V 100 VA
Inputs 1-3 (optional)
Open circuit voltage
Short circuit current

22.8 VDC – 57.0 VDC
< 10 mA (internally limited)
Handset Mouthpiece
Electret microphone
Dynamic capsule with magnetic field generator for inductive coupling of
hearing aids
Stabilization bracketOptional
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