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The Truth About Inmate-Visitor Telephones Electrical or Sound-Powered? Two kinds of telephones are being produced for the inmate-visitor environment. They are electrically powered, and sound-powered. Electrically powered phones are similar to the standard consumer units that have become familiar over the years. Sound-powered units were designed to be used in areas where electricity was not available, as on a battlefield, or in situations where communications must be maintained in case of a power failure, as on a submarine. As a trade-off for not requiring electricity, sound-powered phones are very low in their output. Further, since they generate the current by speech moving a membrane on a magnetic assembly. Any shock to the handset can offset the membrane and magnetic assembly, causing a severe decrease in output. For this reason some sound-powered handsets are made of metal, to protect the mechanism. Manufacturers of sound-powered phones, in order to have adequate volume, have begun to incorporate amplifiers running on batteries (batteries that need to be changed periodically). In the corrections environment, we have electricity. We can take advantage of this modern convenience, and provide high-quality communications in a package that is light, efficient and virtually maintenance-free. Here is a comparison chart:
And so… The Model 100 Inmate-visitor Telephone was born…. imagine… using electricity. It’s a no-brainer…less expensive, more reliable, no batteries to replace, louder conversations volume, more content visitors and inmates - while maintaining maximum security in your visiting area – and all at a lower price. And that’s the truth about inmate-visitor telephones. Call today so that we can design a system for your existing or future facility. Sincerely, Paul Ginsberg, President Professional Audio Laboratories, Inc. |