SOUNDTEL® GRP
Sound-Powered telephones made of Glass Reinforced Polyester (GRP).
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.
SPT605
GRP with door
SPT605 is a sound powered waterproof telephone with manual call generator and door, made entirely of GRP (Glass Reinforced Polyester). Equipped with a door 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.
- SPT605Me mechanic hook
- SPT605Ma magnetic hook
- STP605EA redundant hook
SPT610
GRP without door
SPT610 is a sound powered waterproof telephone with manual call generator and door, made entirely of GRP (Glass Reinforced Polyester). 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.
- SPT610Me mechanic hook
- SPT610Ma magnetic hook
- STP610EA redundant hook
