About hotwire 8777 and 8779 tdm sdsl units, Tdm sdsl overview, Chapter 1 – Paradyne U8777 User Manual
Page 9: About hotwire 8777, And 8779 tdm sdsl units
8700-A2-GB20-40
May 2002
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About Hotwire 8777 and 8779
TDM SDSL Units
TDM SDSL Overview
Hotwire
®
Time Division Multiplexer Symmetric Digital Subscriber Line (TDM
SDSL) products maximize customer service areas by varying the DSL line rate.
This ensures symmetric DSL connectivity over a wide range of telephone line
distances and transmission line qualities. Hotwire 2-wire TDM SDSL products
transmit data over 14,000 feet (4.6 km) at rates up to 2.048 Mbps.
Hotwire products support autorate. Units first synchronize to the highest line rate
that the 2-wire loop supports, then automatically configures the unit to the highest
multiple of 64 Kbps supported by that line rate. Eight line rates are available. At all
rates, an 8 Kbps management channel is available, which enables functions such
as firmware downloads to remote units. Units can also be configured manually to
full or fractional T1 or E1 rates.