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gialinh Posted - Mar 23 2005 : 11:40:17 PM
Hi all,

When I dial to another telephone, how can I detect the signal to make sure that they are accept ?
I mean that how can detect the feedback signal when they press "OK" ?

Please help !
Thanks a lot.
gialinh
1   L A T E S T    R E P L I E S    (Newest First)
audioguru Posted - Mar 24 2005 : 11:03:49 AM
I have never seen a phone with an "OK" button.
In my country we answer a phone call by going off-hook or turning-on the speakerphone. See, every country is different!

When the other end answers the call that I have dialed, the ring-back tone that I hear during their phone's ringing, stops. I don't remember but when they answer, maybe the phone company gives a momentary disconnection to my phone's DC, or momentarily reverses its polarity.

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