I need to dial passcode automatically after dialing conference number from an iPhone app. I tried to make the call and the call gets connected. How can I dial the passcode automatically after the call get connected?
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You can include the character 'p' to introduce a 1 second delay. Digits after the first pause will be sent as post-dial digits using DTMF.
So if your conference access number was 1800123456 and the access code was 987654 then you would specify something like.
Tel://1800123456pp987654
You may need to add more p characters - it can be a bit trial and error.
See RFC2806