Zhone 7995 ユーザーガイド
7990-A2-GB20-20
September 2004
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About the TDM SHDSL Endpoint
TDM SHDSL Overview
Hotwire
®
Time Division Multiplexer Symmetric High-bit-rate Digital Subscriber Line
(TDM SHDSL) 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.
rate. This ensures symmetric DSL connectivity over a wide range of telephone line
distances and transmission line qualities.
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. Thirty-one line rates are available.
At all rates, a 3 kbps Embedded Operations Channel (EOC) is available, which
enables functions such as firmware downloads to remote units. Units can also be
configured manually to full or fractional E1 rates.
that the 2-wire loop supports, then automatically configures the unit to the highest
multiple of 64 kbps supported by that line rate. Thirty-one line rates are available.
At all rates, a 3 kbps Embedded Operations Channel (EOC) is available, which
enables functions such as firmware downloads to remote units. Units can also be
configured manually to full or fractional E1 rates.
Hotwire products transport data over a 2-wire, full-duplex circuit over varying
distances based on the conditions of the loop. Using 24 AWG cable, these
TDM SHDSL products have a loop reach greater than 15,000 feet (4.6 km) at
2.048 Mbps.
distances based on the conditions of the loop. Using 24 AWG cable, these
TDM SHDSL products have a loop reach greater than 15,000 feet (4.6 km) at
2.048 Mbps.