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700-702-900-04, Revision 04
O
VERVIEW
This guide contains installation information for the ADC WorldDSL
UTU-702C List 1 and ETU-752C List 1 Rate Selectable (RS) line and desktop
units.
R
S
ATE
ELECTABLE
WorldDSL RS is a single pair High-bit-rate Digital Subscriber Line (HDSL)
solution that offers extended reach capabilities through the use of
industry-leading multi-rate DSL technology. The UTU-702C and ETU-752C
deploy HDSL in networks using a single pair of copper wire running at speeds
between 64 kbps and 2048 kbps. The HDSL line rates are either menu
selected in time slot increments of 64 kbps or derived automatically from the
Terminal Transmission (TT) clock received at the Nx64k serial data port from
the Network Data Terminal Equipment (DTE). Transmission ranges vary
according to the rate selected. Depending on noise environment, ranges of up
to 8.5 km (5.3 miles) are possible at the lowest-selectable HDSL line rates
(64 and 128 kbps).
WorldDSL RS units are not backward compatible with
standard HDSL or management unit firmware. The installed
firmware must be that designed for rate selectable units.
WorldDSL RS units must have the same payload rates
available. An LTU set for a rate of 768 kbps will not function
with an NTU whose maximum available rate is 256 kbps.
UTU-702C L
The UTU-702C can be configured as a Line Termination Unit (LTU) or
Network Termination Unit (NTU). The default configuration is NTU.
When configured as an LTU, the UTU-702C serves as the Exchange Office
side of a repeaterless, HDSL transmission system. The LTU-configured unit
connects to an NTU-configured unit (UTU-702C or ETU-752C) over one
twisted-pair of copper wire, completing the HDSL transmission system.
The UTU-702C has an Nx64k serial data interface with user-selectable
protocols that include V.35, V.36, X.21, and RS-530 (RS-449). The
UTU-702C accepts the DTE payload at its Nx64k serial data port and
transports the data to the remote unit at the selected HDSL rate. The
UTU-702C requires -36 to -72 Vdc from a local power supply or an
enclosure's AC-to-DC power supply; it does not supply power to other HDSL
units.
UTU-702C and ETU-752C List 1
HDSL
U
INE
NIT
June 14, 2002
Overview
™
RS
1
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