Calling OBi from a number which does not exist in the "Trusted Caller IDs"

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ajayhere24:
Thank you both for the quick responses! MichTel thank you again for the quick and detailed responses.

Ajay

jimates:
Just asking, how does google voice do it?
Pressing * while the phone is ringing brings up the attendant. Some cell providers do the same thing.

OBi-Guru:
GV phone app is the equivalent of the Phone attached to the OBi.   In this case, yes, one can do almost anything to make it work during the "ringback" state - because the ringback is actually audio signal sent out by the OBi device to the phone.

However, the OP asks about incoming calls which the OBi has not yet answered, and trying to send some DTMF tones.   This is not possible.

jimates:
Not calling from google.

I am talking about calling my GV number from any phone, and as soon as it rings the first time I press * and it goes to the attendant. I don't have to wait for 4 rings and the voicemail pickup.

i can do the same thing to access my cellular voicemail from any land line.

MichiganTelephone:
One thing you need to understand is that there are differences in operation before and after a line is "answered."  When you call someone, until the line is answered, the destination switch can send audio back to the caller (ringing signal, busy signal, number not in service recordings, etc,) but cannot receive audio from the caller (touch tones or voice).  Once the call is "answered" and the caller begins to be charged for the call (if on a traditional long distance call), then audio can be sent in both directions.  So if Google Voice or any other service can receive touch tones and act on them while you're listening to a ringing signal, it means they have already answered the call and (if you're calling via regular long distance) you are getting charged to listen to ringing signal, even if no one ultimately answers (either that, or they're not following standard telephone company practices).

So with the OBi devices, in order for them to allow touch tone input during ringing signal, they'd have to actually answer the call first to establish two-way audio and then play "fake" ringing signal (fake only in the sense that it's not coming from the telephone company), and then long distance callers would get charged to listen to ringing signal  >:(, and a lot of people would complain about that!

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