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COD. ART.: ENPTK-100D
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DIGITAL TELEPHONE TRANSMITTER
The product operate several functions, like telephone line monitoring and transmission of the obtained informations via digitally encrypted radio channel that eliminates interception of the transmitted data.
Analog-digital conversion is based on the principle of adaptive-delta modulation (ADM).
The transmitter is designed as a rectangular metal module with telephone line connection leads and flexible antenna.
The product is connected serially in a «brake» of one of wires in any point of an urban telephone line with any polarity.
The product goes to the transmission mode automatically as soon as the handset is picked up. Unless the handset is picked up the product stays in the standby mode, the transmitter is switched Off.
As soon as the unit is powered from the telephone line the time of its operation is practically unlimited. Connecting the unit to the telephone line does not cause any effect on the line.
The product can be connected to telephone lines of analog mini-ATXs.
TECHNICAL SPECIFICATION OF DIGITAL TELEPHONE TRANSMITTER
| Frequency |
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416,5 - 423,5 MHz |
| Frequency control |
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Crystal |
| Modulation |
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GMSK |
| Phone line connection |
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serial connection |
| Output power |
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15 mW |
| Power supply |
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telephone line |
Voltage drop on the product
in the phone line monitoring mode |
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6.5 V |
| Time of continuous operation |
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unlimited |
| - operation mode |
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34 mA |
Dimensions
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72 x 22 x 5 mm |
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