SMC Networks this week said it is shipping the \u201cthe industry's first 10 Gigabit Ethernet over CAT-5e transceivers.\u201d However, it should be noted that these are based on Vativ Technologies\u2019 approach.You may remember the controversy over Vativ\u2019s technology, which I discussed in a couple of newsletters last year. I passed along the comments from both the IEEE 802.3an Task Force chair and Vativ\u2019s director of marketing. You can find those newsletters in our archive, here and here.Vativ argued that its approach to 10 Gigabit Ethernet over copper is superior to that of the standards body. The company\u2019s stance is that the standard would cost more than its approach, require more power and require new cabling.SMC is using Vativ transceivers in 10 Gigabit Ethernet XENPAK modules. The modules use a hot-pluggable XAUI interface on the host side, SMC says. They connect to other devices via Cat-5e cabling and RJ-45 connectors over short distances (up to 10 meters). They would connect to switches, routers or servers from a switch.The transceivers are just $450, and are intended as uplinks for SMC\u2019s Gigabit Ethernet switches, namely the 24- and 48-port SMC TigerStack 1000 switches.This is the first shipment of Vativ\u2019s 10 Gigabit technology to end users. SMC says it chose the controversial technology because it \u201cis committed to being a leader in 10Gig product offerings.\u201d SMC sees 10 Gigabit in general as being the dominant technology in enterprise backbones and in storage technology, and the company wants to be out in front of that trend.