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GSM  Solar Emergency Speaker  Phone KNEM 21 GSM

small arrowGSM version 2G - 3G
small arrowVandal Proof
arrowMains or Solar Powered
arrowRechargeable Battery
small arrowIP55 - CE Mark - EMC - RoHS

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Brochure & Specification

KNEM 21 GSM 2G - 3G Tower wireless emergency help point phone with the option solar powered with battery back up, single button auto dial with 2 button or handset options.

As soon as the button is pressed you will be automatically connected to an operator and an beacon light will flash. The remote operator can call the speaker phone which will auto answer enabling the operator to speak via the loudspeaker. e.g. " please leave the area" " help is on the way"

Can be supplied with a variety of different speaker phones / press the button to talk panels or handset. Vandal proof for operation in public places, Stations, Railway, Shipping, Tunnel and Road Side applications as well as for many other applications indoor and outdoor use.

KNEM 21 GSM is manufactured to a very high standard in a steel housing, IP65 rated protection against all the weather elements as well as dirt and ingress. Built with tough vandal resistant components.

KNEM 21 meets the latest UK and European standards CE Mark, EMC, RoHS, lightening protection and with a wide operating temperature range, it is built for long term high reliability of operation.

Main Features

  • GSM 2G - 3G standalone - SMS GPRS support
  • AC powered 110/220 volts with rechargeable battery
  • Standby 21 days - Talk time 21 hours
  • One button auto dial help ( Full Keypad Option )
  • Robust steel housing and armoured cables (Stainless steel Option)
  • Solar panel powered with battery back up OPTION
  • Vandal resistant and tamper-resistant hardware, easy installation
  • Bright fade resistant lacquered paint
  • Housing colour and graphics can be customized
  • Inner components insulated from exterior, offers high EMC immunity
  • Built in microphone and loud speaker with LED indication of call
  • Weather resistant to IP55 standard
  • Service temperature range from: -20 to +60 deg C
  • Hearing Aid compatible receiver 12 volts required
  • Noise canceling microphone
  • On site or remote diagnostics support option
  • Adjustable time out, to release the line if the caller hangs up
  • Lightening protection to ITU-T recommendation K.21
  • Ingress Protection: IP 67 MTBF: 100,000 hours
  • EMC: EN55022 / EN55024/ Railway Electromagnetic Approved EN50121-3-2:2006 CE Mark-FCC-ISO 9001-TUV
All information and specifications on this site is subject to change without prior notice and should be considered as "preliminary" only.

Examples of post mount GSM and Solar Panels

Post mounted GSM emergency telephones                      Solar Powered Water proof telephones                                                                          


Public help emergency vandal proof waterproof telephone wireless applications no mains power roadside sos, docks and on ships, Factories, Taxi Ranks, Bus Stations, Roadside Motorway, Terminals, Tunnel, Ports, Mines, Generation facilities and many more.
This phone is also called: GSM speaker phone, waterproof telephone, weather proof telephone, SOS telephone, fire alarm telephone, monitor telephone, ATM help telephone, bank telephone, kiosk telephone, roadside telephone, airport service telephone, railway telephone, underground telephone, metro telephone, tunnel telephone, station telephone, car park telephone, public telephone, outdoor telephone, payphone, school telephone, university telephone, hospital telephone, police station telephone, dock telephone, prison telephone, etc.

Please see Koon Technology web site for company information:

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