File: Hertz of Telco Tones >>===========================================================<< >> ANOTHER TELECOMMUNICATIONS PHILE FROM THE ARCHIVES OF THE << >> PRIVATE SECTOR BBS (201) 366-4431, OFFICIAL BOARD OF 2600 << >> FOR BEST RESULTS WHEN READING TRY 80 COLUMNS / LOWER CASE << >>===========================================================<< TELCO TONES by Compy Well, last night I took the telephone and a few oscillators to see what combination of tones formed the dial-tone, busy-signal, etc... Here they are: Dial-tone: 350hz and 440hz Busy-signal: 620hz and 440hz - on for 1/2 second, off for 1/2 second... Attention: (blasting tone you get when you forget to hang up the phone: 1400hz, 2060hz, 2450hz, 2600hz all mixed together. (Pulsed at a rate of 5hz) Ring: 440hz, 480 hz. Also, you cannot hear the following tones, but when your phone rings, the switching office sends the following signals to activate different types of 'ringing' sounds: Decimonic ring: 20, 30, 40, 50hz Harmonic ring: 16-2/3, 25, 33-1/3, 50hz Synchromonic ring: 20, 30, 42, 54hz On the standard ESSX or DMS-100 switching systems, you only get one type of ring. However, if you are on a SLC-60 switching system (coming soon from Bell), the phone company can choose which one you get by the flip of a switch... >>===========================================================<< >>=> PHOR THE BEST IN TELECOMMUNICATIONS INPHORMATION READ <=<< >>===========================================================<< >> 2600 MAGAZINE, BOX 752, MIDDLE ISLAND, NY 11953-0752 << >> 12$ A YEAR, 1$ FOR BACK ISSUES << >>===========================================================<< >>=> FOR THE BEST IN TELECOMMUNICATIONS INPHORMATION MODEM <=<< >>===========================================================<< >> THE PRIVATE SECTOR BBS ... 300/1200 ...... (201) 366-4431 << >> THE PEARLY GATES BBS ..... 300 BAUD ...... (203) 624-4425 << >> SHADOWLAND BBS ........... 300 BAUD ...... (303) 939-9614 << >> THE DARK FOREST BBS ...... 300/1200 ...... (516) 549-0268 << >> THE BROADWAY SHOW BBS .... 300 BAUD ...... (718) 615-0580 << >>===========================================================<< >> ANOTHER TELECOMMUNICATIONS PHILE FROM THE ARCHIVES OF THE << >> PRIVATE SECTOR BBS (201) 366-4431, OFFICIAL BOARD OF 2600 << >> FOR BEST RESULTS WHEN READING TRY 80 COLUMNS / LOWER CASE << >>===========================================================<< Call The Works BBS - 1600+ Textfiles! - [914]/238-8195 - 300/1200 - Always Open