ST RK ISO 9001:2009


ST RK ISO 14001-2006


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FTC–0.1-GR Telephone Filter

Purpose:
 
Phone filter is intended for protection against unauthorized listening of acoustic signals   
in rooms via digital and analog telephone apparatus.
Climatic modification is MCC of category 4.
 
Technical specification:
 

Indicator name

Norm, dB

Weakening of the low-amplitude signal in the telephone line  when the  telephone handset lies on a cradle within the band of minimum 0.3…3.4 kHz, 

40

Weakening of the signal in the telephone line  in case the  telephone handset is raised from the handset within the band of no more than 0.3…3.4 kHz

0,2

Weakening of the signal in the telephone line when the telephone handset lies on the cradle on a frequency of minimum 20 kHz

20

Weakening of the signal in the telephone line when the telephone handset lies on the cradle on a frequency of minimum 100 kHz

40

 


Delivery set:  
  • Article – 1pc.
  • Passport – 1 pc.                  
 

                 

 
 

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