martin@bellcore.bellcore.com> (08/31/90)
[ Much stuff deleted about CCITT recomendations] Ok, here's today's trivia question: what were the following tones used for: [ quoted from CCITT reccomendations about tones that answering machines shouldn't use ] > 2040 and 2400 Hz > 600 and 750 Hz > 1200 and 1600 Hz > 500 and 20 Hz > 1000 and 20 Hz Some of them, I think, may be a little obscure to North American readers. I'll followup with some answers in a couple of days. Martin Harriss martin@cellar.bae.bellcore.com