Telephone answer supervision circuit

Discussion in 'Embedded Systems and Microcontrollers' started by sivlag07, Jun 2, 2011.

  1. sivlag07

    Thread Starter New Member

    Feb 8, 2011
    1
    0
    Hello everyone, I need some support regarding telephone answer supervision. What circuit can be implemented in order to know for sure that the far end in a call have answered. I understand I can use a Call Progress device in order to have a ring back signal fed to my circuit but is it enough to be sure that the far end is talking once the ring back tone is ended by the CO?
    I am bulding a circuit using an 8051 Ucontroller for use as a meter reading for time consume while talking on the phome.
    Thanks for your ideas
    ;)
     
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