Prowid course material: https://kurslar.prowid.com/en/index.php?id=lesson&m=3585
Voice over IP: Codecs, RTP, DTMF and Quality · DTMF in VoIP
RFC 4733 packet sequence: marker bit, duration increase and retransmission
🔒 This is the beginning of the lesson. The full lesson is available with a subscription.
