SOUNDTEL® ALU

Sound-Powered telephones made of ALUMINUM.

Sound-powered are a particular type of telephone that does not require any power source to operate. They do not have electronic circuits, but are equipped with telephone capsules that can generate an audio signal simply by using the energy of the sound pressure generated by the person speaking.

Of course, these telephones cannot be used on any of the traditional telephone networks, but they can be used to build private networks in special environments, such as ships and tunnels and metropolitan tunnels.

They are equipped with a rotary manual call generator which generates a sound which is used to induce the operator to the other end of the line to answer the call. The advantages of this technology also include the possibility of establishing connections with a common copper telephone cable over considerable distances, even greater than 20 km.

SPT700
Aluminium with door

SPT700 is a sound powered waterproof telephone with manual call generator and door, made entirely of die-cast aluminum. It requires no power source and allows operation on copper cables over several kilometers. It is produced with a mechanical or magnetic hook, or with a dual technology redundant hook.

Order Codes
  • SPT700Me Mechanical Hook
  • SPT700Ma Magnetic Hook
  • STP700EA Redundant Hook

 

SPT710
ALU without door

SPT710 is a sound powered waterproof telephone with manual call generator, made entirely of die-cast aluminum. It requires no power source and allows operation on copper cables over several kilometers. It is produced with a mechanical or magnetic hook, or with a dual technology redundant hook.

Order codes
  • SPT710Me Mechanical Hook
  • SPT710Ma Magnetic Hook
  • STP710EA Redundant Hook