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Loud Bell/Ringer for Mobile/Cell Phone

johnc83

Jan 23, 2015
5
Joined
Jan 23, 2015
Messages
5
Hi, we have a noisy factory area where we need to reach people by phone and we need a loud ringer so the people can hear it ringing.

I am aware of loud external ringers but they only seem available for fixed LandLine telephones. I need one for a mobile phone. If possible I'd like a simple loud bell rather than speakers. Could anyone advise if it is possible to get something like this?
 

Tha fios agaibh

Aug 11, 2014
2,241
Joined
Aug 11, 2014
Messages
2,241
There's one called ringmaster on the market.
Or, you could design and build your own.
 

Bluejets

Oct 5, 2014
5,997
Joined
Oct 5, 2014
Messages
5,997
Most mobiles have a buzzer/motor vibrator.
One on my Iphone is difficult to ignore.
 

andrea chiu

Mar 13, 2018
5
Joined
Mar 13, 2018
Messages
5
I think you try this Algo 8180 SIP Audio Alerters. It works great as an external ringer.
 

FuZZ1L0G1C

Mar 25, 2014
366
Joined
Mar 25, 2014
Messages
366
I don't know if the Ringmaster or Algo 8180 have this design, but my idea is to have a small mike mounted in a cellphone cradle, with input sensitivity control, to avoid ambient sounds triggering it.
The relatively loud mobile ring (rectified audio) would trigger an alarm circuit via thyristor gate.
 
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