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impulse indicator

In the electromechanically switched telephone networks, signalling was carried out by means of pulse indicators (IKZ) and pulse dialling

. The pulse indicator was already used for signalling in the classic circuit-switched telephone network, the POTS (Plain Old TelephoneService

), and already activated the lifting rotary dialer

, via which thecircuit

switching was then switched. Thepulse indicators themselves are DC pulses generated via number dialling.

The pulse indicators were and are also used in private branch exchanges for direct dialling to telephone extensions.

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Englisch: impulse indicator
Updated at: 22.09.2008
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Translations: DE