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HDSL 220 Transceiver Unit for Central Office Installation and Maintenance Practice
HDSL SYSTEM TESTING
The ADTRAN HDSL system provides extensive ability to monitor the status and performance
of the DSX-1 signals, DS1 signals, and HDSL loop signals. Detailed performance monitoring is
provided by the faceplate-mounted RS-232 Control Port. These features are valuable in
troubleshooting and isolating any system level problems that may occur at installation or
during operation of the HDSL system.
220 HTU-C Bantam Jacks
The front panel of the 220 HTU-C contains metallic splitting bantam jacks for both nonin-
trusive (monitoring) and intrusive (terminating) DSX-1 test access. Refer to
specific jack details.
T
DSX-1
R
DSX-1
MON
RX
EQ
RX
EQ
TX
DSX-1
MON
TX
T1
DSX-1
R1
Figure 19. 220 HTU-C Bantam Jack Arrangement
30
220 HTU-C
HDSL
Loop 1
HTU-C
Loop DC
Data
Power Source
Pump
HDSL
Loop 2
Figure 19
for
HDSL
Loop 1
HDSL
Loop 2
61247001L1-5A
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Troubleshooting
