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Accessible from your Account page after purchase. Requires the free QuickTime Player software.
Videos can be viewed on: Windows 8, Windows XP, Vista, 7, and all versions of Macintosh OS X including the iPad, and other platforms that support the industry standard h.264 video codec.
RTP header compression (cRTP), as demonstrated in this video, can reduce the bandwidth used by a voice call over a WAN link. Specifically, a voice packet's 40 Byte Layer 3 and Layer 4 headers can be reduced to only 2 or 4 Bytes.