In 2004, AT&T announced a USD 4.4 billion project named Lightspeed that involved a first phase of five years that would impact 18 million out of its 60 million fixed-line subscribers. The motivations behind the launch of Lightspeed included increasing competition from mobile operators for consumer voice services and the opportunity to launch digital IP video services. Some analysts have noted that forbearance by the Federal Communication Commission (FCC) from regulating
FTTx also helped pave the way for the migration.The access technology used by Lightspeed essentially involves FTTN which would benefit 17.5 million out of the targeted 18 million end users. The remaining 500 000 end users, located mainly in Greenfield areas, would benefit from FTTH.
The FTTN will be terminated with legacy copper access using ADSL2 or 2+, or VDSL2 technologies. Services provided to end users include high-quality video, which includes one highdefinition stream, high-speed multigrade 1.5, 3 and 6 Mbit/s Internet access, Video-on-Demand, IMS-based voice service,streaming music and other interactive applications.
AT&T plans to follow an IMS overlay strategy to develop these services. To support the migration, AT&T plans to encourage its voice customers to adopt its triple-play bundle, thus allowing the transition of voice lines to the new IMS network. No date has been set for a complete switchover from the legacy network.
Source: ITU
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