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51 lines
2.6 KiB
Plaintext
51 lines
2.6 KiB
Plaintext
File: Hertz of Telco Tones
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>>===========================================================<<
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>> ANOTHER TELECOMMUNICATIONS PHILE FROM THE ARCHIVES OF THE <<
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>> PRIVATE SECTOR BBS (201) 366-4431, OFFICIAL BOARD OF 2600 <<
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>> FOR BEST RESULTS WHEN READING TRY 80 COLUMNS / LOWER CASE <<
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>>===========================================================<<
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TELCO TONES by Compy
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Well, last night I took the telephone and a few oscillators to see what
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combination of tones formed the dial-tone, busy-signal, etc... Here they are:
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Dial-tone: 350hz and 440hz
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Busy-signal: 620hz and 440hz - on for 1/2 second, off for 1/2 second...
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Attention: (blasting tone you get when you forget to hang up the phone: 1400hz,
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2060hz, 2450hz, 2600hz all mixed together. (Pulsed at a rate of 5hz)
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Ring: 440hz, 480 hz.
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Also, you cannot hear the following tones, but when your phone rings, the
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switching office sends the following signals to activate different types of
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'ringing' sounds:
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Decimonic ring: 20, 30, 40, 50hz
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Harmonic ring: 16-2/3, 25, 33-1/3, 50hz
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Synchromonic ring: 20, 30, 42, 54hz
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On the standard ESSX or DMS-100 switching systems, you only get one type of
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ring. However, if you are on a SLC-60 switching system (coming soon from Bell),
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the phone company can choose which one you get by the flip of a switch...
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>>===========================================================<<
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>>=> PHOR THE BEST IN TELECOMMUNICATIONS INPHORMATION READ <=<<
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>>===========================================================<<
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>>===========================================================<<
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>> THE PRIVATE SECTOR BBS ... 300/1200 ...... (201) 366-4431 <<
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>>===========================================================<<
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>> ANOTHER TELECOMMUNICATIONS PHILE FROM THE ARCHIVES OF THE <<
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>> PRIVATE SECTOR BBS (201) 366-4431, OFFICIAL BOARD OF 2600 <<
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>> FOR BEST RESULTS WHEN READING TRY 80 COLUMNS / LOWER CASE <<
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>>===========================================================<<
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