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Transmission over copper CXR is offering a range of low rate transmission, the Base Band Modem , and four ranges of high rate transmission, using the symetrical DSL technologies. Both are using one or two pairs of copper without discontinuity. The Base Band Modem are transmiting synchronous or asynchronous links for point-to-point or multipoint connections with at speed below 1Mbps. This equipment are mainly used for industrial applications, interconnection of asynchronous terminals or local loop for the leased line distribution. CXR is offering various technologies DSL allow the symmetrical transmission until 15Mbps between two points with possibilities of concentration. These technologies are the MSDSL, GSHDSL and VDSL. This transmission is allowing the LAN extension, the voice extension like the PBX interconnection and the local loop for all carrier application.
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