a header that contains the start and end bits used to package image frames. It also includes information on whether the packet contains an image that has been exclusively intraframe encoded, and an indication of whether motion vectors are used in the bit stream. The header also includes bits used for decoding a group of blocks and associated macroblocks, the value to be used during the quantization process, and horizontal and vertical motion vector data. Internet standards track advances quickly. The Draft that defines an RTP Payload Format for H.263 Video Streams concisely states, "It is inappropriate to use Internet- Drafts as reference material or to cite them other than as work-in-progress." ADVANCING THE PERSONAL CONFERENCING INDUSTRY The personal conferencing industry was made not born. Many large and influential companies decided that it was time for the multimedia industry to take off and did something about it. Key in this group are Intel and Microsoft, both of which have a stake in seeing successive generations of increasingly powerful desktop applications. AT&T, MCI, Sprint, and the former Baby Bells all worked toward a time when average users would transmit multi-megabit traffic as routinely as they made telephone calls. In short, many different organizations are cooperating and embracing standards to provide the means for an interactive multimedia market. Driven by the need to simplify, they are bundling products into turnkey solutions. Personal Conferencing Intel may have introduced the modern one-stop shop trend in personal conferencing. Its ProShare introduction barely preceded an announcement of an impressive partnership of five of the seven RBOCs, GTE, AT&T, and several networking companies. Intel offered steep price reductions when ProShare customers bought their systems through these partners. The discounts were especially attractive when ProShare was bundled with multi-carrier offerings (LEC and IXC combinations). One key aspect of Intel's partnership was its creation of the "ISDN Blue" stand