Kristallen (Algemeen)

door Maurice , Dordrecht, 14.08.2017, 19:02 (2659 dagen geleden) @ J vd Westelaken

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Out-of-band signaling is achieved by moving the signaling tone frequency outside the 300Hz to 3,400Hz VF passband (but still within the 4kHz channel slot). A common example of this is the use of a 3,825Hz signaling tone.

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