Owner's manual

6
HDSL remote access shelf
With the HDSL remote access shelf,
the user gains additional access
points on the HDSL span. The shelf
houses the HDSLtransmission unit at
the remote site, namely a standard
200/400-mechanics HTU-R card.
Much like the HTU-C card within the
HDSLdoubler power supply performs
T1-to-HDSL, the HTU-R within the
remote access shelf performs the
HDSL-to-T1 conversion. The remote
access shelf also contains T1 jacks
that allow the T-BERD Outside Plant
Tester to perform BER testing.
Hardware accessories
Users can order accessories for the
T-BERD Outside Plant Tester that can
enhance the test set’s functionality
in performing a number of testing
applications.
TroubleshootT1 spans
Repeater adapter
The repeater adapter enablesthe
T-BERD Outside Plant Tester to test
repeatered spans with a single cable.
During this process, the user can
control test access to easily section-
alize span trouble. The repeater
adapter allows testing toward the
customer or central office as well as
testing the repeater itself to section-
alize span trouble. Italso provides
an additional accesspoint, at the
repeater casing, along the T1 span.
Repeater power supply
The repeater power supply powers-up
a T1 circuit from the main distribution
frame (MDF) which allows the T-BERD
Outside PlantTester to test and
qualify circuits prior to installation
and connection of the central office
repeater. If the span is longer than
17 repeaters, the user can selecta
current between 60 mA, 100 mA, and
140 mA to power-up longer spans.
The repeater power supply displays
span voltage and current for compari-
son with circuit design.
Repeater power supplymultiplexer
The repeater power supply multi-
plexer allows the user to switch
automatically between T1s in the
field. It can remotelyswitch power
between up to sixT1 spans and
provide regenerative signal
loopbackfor single-technician
applications. Itmay be used with
standard and intelligentline repeaters.
Turn Up and Troubleshoot HDSLspans
HDSL doubler power supply
With the HDSLdoubler power supply,
the technician can access the span at
the MDF and emulate the HDSL trans-
mission unit at the central office
(HTU-C) by housing the 220 mechan-
ics HTU-C card. The HTU-C card inside
the doubler power supply performs
T1-to-HDSLconversion and supplies
the appropriate span power. The front
panels of the doubler power supply
contain T1 jacks that allow the T-BERD
Outside PlantTester to perform BER
testing. In addition, the T-BERD
Outside PlantTester can provide
loopbackcapabilities using prepro-
grammed HTU-C, HTU-R, and doubler
loopcodes.