Telephone
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Auto Telephone
There are various shapes (desktop type, wall-mounted type, embedded type, and portable type) suitabl… -
Common Battery Telephone
Common electric telephones use a 24 VDC power supply and can call the other party with a simple oper… -
Battery less Telephone
A batteryless phone is a phone that does not require an external power source. Call the other party … -
Peripheral Equipment for Telephone
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Intrinsically Safe Auto Telephone
Intrinsically safe explosion-proof automatic telephones consist of an explosion-proof telephone and … -
Intrinsically Safe Construction Battery less Telephone
Intrinsically safe explosion-proof batteryless telephones are installed in a safe compartment for ge…