The Out-band Transmission In MSR Series
Keywords:MSR;Out-band Transmission
Q: What is Out-band Transmission in MSR Series ?
A:
Normally, when we make an IP call, we will dial a chain of number first, such as 17910, there will be a voice sounds up: Please input...., then any number that you dial all belong to DTMF code. It not a single voice transfer. If this signal is modulated with voice signal and send out, we call it In-band transmission, therefore, Out-band transmission is set up another tunnel for this DTMF signal.
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