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Date: 11/26/02 at 6:45 PM
Posted by: gilbert bautista
E-mail: noobtobias@yahoo.com

i am currently working a project wherein it would dial telephone numbers and play a certain message for notification. i need a circuit to detect the dial tone, the calling ring (the audible ring when you call somebody) and the busy signal conditions so that i could use them as inputs to my microcontroller so that the status of the party being called could be determined.

Follow Ups:

  Re: dial tone, calling ring and busy signal detection Beso   Posted at: 06/18/03 (1)

  Re: dial tone, calling ring and busy signal detection gilbert   Posted at: 07/03/03 (0)

  Re: dial tone, calling ring and busy signal detection Grasshopper   Posted at: 12/13/02 (1)

  Re: dial tone, calling ring and busy signal detection gilbert bautista   Posted at: 01/06/03 (0)

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