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- Metering_pulse abstract "In telecommunications signalling, metering pulses are signals sent by telephone exchanges to metering boxes and payphones aimed at informing the latter of the cost of ongoing telephone calls.The properties of these signals differ between countries, but they typically have a frequency of 50Hz, 12 kHz or 16 kHz, and a duration of several tens or hundreds of milliseconds. 50Hz pulses are applied to the telephone circuit as common-mode signals, with respect to ground, as applying them differentially would allow the talking parties to hear 50Hz buzz tones. These pulses are applied at relatively high voltage to distinguish them from 50Hz power-mains-induced signals. 12- and 16 kHz metering pulses are applied differentially across the telephone circuit, as these frequencies cannot be heard by listeners with conventional telephone instruments.Each pulse represents a certain incremental cost. Therefore, during more expensive calls the exchange will generate more metering pulses per minute than during cheaper calls.See also: Automatic Message Accounting".
- Metering_pulse wikiPageID "8885183".
- Metering_pulse wikiPageRevisionID "545420725".
- Metering_pulse hasPhotoCollection Metering_pulse.
- Metering_pulse subject Category:Telephony_signals.
- Metering_pulse type Abstraction100002137.
- Metering_pulse type Communication100033020.
- Metering_pulse type Signal106791372.
- Metering_pulse type TelephonySignals.
- Metering_pulse comment "In telecommunications signalling, metering pulses are signals sent by telephone exchanges to metering boxes and payphones aimed at informing the latter of the cost of ongoing telephone calls.The properties of these signals differ between countries, but they typically have a frequency of 50Hz, 12 kHz or 16 kHz, and a duration of several tens or hundreds of milliseconds.".
- Metering_pulse label "Gebührenimpuls".
- Metering_pulse label "Metering pulse".
- Metering_pulse label "Telefoontik".
- Metering_pulse sameAs Gebührenimpuls.
- Metering_pulse sameAs Telefoontik.
- Metering_pulse sameAs m.027n8b3.
- Metering_pulse sameAs Q206294.
- Metering_pulse sameAs Q206294.
- Metering_pulse sameAs Metering_pulse.
- Metering_pulse wasDerivedFrom Metering_pulse?oldid=545420725.
- Metering_pulse isPrimaryTopicOf Metering_pulse.