ANI then callback circuit. DSCN0452

Описание к видео ANI then callback circuit. DSCN0452

First a random green A.E. phone is I.D.d to get its number. Then the callback
circuit is dialed at 311, gets its dialtone, then the number of the phone 3469
is entered and the circuit responds with loud 500 cycle tone. Then the green phone is hung up and the callback circuit calls it. Then it gets answered and the tick-tone is heard confirming the call is coming from the callback test
circuit.

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