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RAD
HTU-2 HDSL Termination Unit |
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- Using HDSL technology,
HTU 2 extends the range of digital equipment up to
4.8 km (3.0 miles) over 24 AWG (0.5 mm), 4 wire
copper cable. Using the HDSL repeater extends the
range up to 8.4 km (5.2 miles) between the central
office and customer premises.
- HTU-2 eliminates the
need for repeaters or optical cable in the last mile
(local loop) or in the campus network environment.
- Using advanced
equalization, adaptive-filtering, echo cancellation
technology and 2B1Q line coding, HTU 2 compensates
for line impairments, bridge taps and mixed cabling.
High immunity to background noise enables
transmission of multiple HDSL lines via the same
physical cable.
- Two clock modes are
available:
- Internal -
available only when the unit is configured as
"CENTRAL". In this mode, the internal
clock generator provides clock to the digital
interface and the HDSL line.
- External -
available when the unit is configured as either
"CENTRAL" or "REMOTE". In
"CENTRAL" mode, the clock is recovered
from the digital interface and passed to the
HDSL interface. In "REMOTE" mode, the
clock is recovered from the HDSL interface and
passed to the digital interface.
- Setup, control and
monitoring of status and diagnostics information can
be performed using one of the following:
- Front panel LCD
with three push buttons, using menu driven
management
- ASCII terminal
connected to the async control port using
command line interpreter
- SNMP management
station connected to the async control port,
using Serial Link Interface Protocol (SLIP).
- The priority bumping
feature allows the user to select the timeslot
priority (high or low) in case one of the HDSL lines
is down.
- HTU-2 is available as
a standalone unit or as a rack mount card (HTU-2C)
for the LRS-12 modem rack with SNMP management.
- HTU-2 is available in
either AC or DC version and can be mounted in a
standard 19" rack using special hardware. One
or two HTU-2 units can be mounted side-by-side.
- The HTU-2C card can
provide a remote power feed for an HTU E1L/P or
HTU-2/P unit. For the remote power feeding option, a
standalone power supply, LRS PS-FEED, should be
ordered separately.
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