Bedlam Loud Tonecaller

Part Number: refer to datasheet

The line powered 105dBA Bedlam Loud Tonecaller is a telephone extension sounder which has been designed for installation in large offices or factory areas which have high ambient noise levels so that a ringing telephone can easily be heard.

The unit is rated to IP66 and is suitable for operation in adverse conditions.



  • Telephone line powered (no mains voltage required)
  • Penetrating output (105dBA typical)
  • Volume control
  • Reduced installation costs
  • Available for hard wiring (using either screw or I.D.C. connections) or supplied with a 3 metre line cord and a 431A plug
  • Weatherproofing to IP66
  • REN of 0.75
  • Maintenance free operation
  • 2 selectable tones


The Bedlam Loud Tonecaller is designed to replace traditional mains powered bells, and is powered by the PABX and PSTN line voltage (60-100 volts AC). A variable output of 85-105 dBA is obtained by means of a potentiometer located within the unit.