NV-700I Managed Industrial VDSL2 CO/CPE Modem USER’S MANUAL Ver. A.5
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enable operators and carriers to gradually, flexibly, and cost-efficiently upgrade existing xDSL
infrastructure.
The protocol was standardized in the International Telecommunication Union telecommunications
sector (ITU-T) as Recommendation G.993.2. It was announced as finalized on 27 May 2005,[1] and
first published on 17 February 2006. Several corrections and amendments were published in 2007
through 2011.
VDSL2 is an enhancement to very-high-bitrate digital subscriber line (VDSL), Recommendation
G.993.1. It permits the transmission of asymmetric and symmetric aggregate data rates up to 200
Mbit/s downstream and upstream on twisted pairs using a bandwidth up to 30 MHz.
VDSL2 deteriorates quickly from a theoretical maximum of 250 Mbit/s at source to 100 Mbit/s at 0.5
km (1,600 ft) and 50 Mbit/s at 1 km (3,300 ft), but degrades at a much slower rate from there, and
still outperforms VDSL. Starting from 1.6 km (1 mile) its performance is equal to ADSL2+.
