What the B and D channels do?
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Answer / Avneesh Sharma
B channels carry voice, video, and other circuit-switched data, while D channels are used for control signaling and packet-switched data. Specifically, B channels provide 64 Kbps of bandwidth, and D channels come in two flavors: D1 (16 Kbps) and D2 (64 Kbps), used primarily for signaling and synchronization.
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