First-quarter digital subscriber line (DSL) network equipment numbers are in, and according to a market research firm, there is a major upswing -- driven in part by the growing IPTV market. First-quarter DSL access concentrator port shipments reached record levels, totaling almost 19.2 million ports. That�s a 35 percent jump compared with the same quarter of last year, when 14.2 million ports were shipped, according to a report issued by Dell'Oro Group. Defining network gear volumes by ports shipped reflects business in new DSL aggregation units and upgrades adding connection ports to add capacity. "Port shipment growth is increasingly driven by service providers upgrading to all-IP networks, as well as deploying higher bandwidth equipment to enable new revenue producing services such as IPTV," said Steve Nozik, principal analyst for broadband access research at Dell'Oro Group. That included significant deployments of very high-speed DSL (VDSL) technology outside of A
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