Installation - ADTRAN HTU-C M Installation And Maintenance Manual

1244022L1 Low Voltage HTU-R SA
1244041L2 Low Voltage T400 HRE
1244042L1 Low Voltage 819A HRE
1244044L1 Low Voltage 439 HRE
1245021L1 Low Voltage HTU-R T200
CP
1245022L1 Low Voltage HTU-R SA
1245024L1 T400 HTU-R w/Local Power
Option
1245026LX Low Voltage HTU-R
1246026LX 6th Gen HTU-R
1245041L1 T200 HRE
1245045L1 239 HRE
1246041L1 T200 HRE
1246045L1 239 HRE
The HTU-C M can be deployed in circuits consisting
of one HTU-C M and one HTU-R. When deployment
requires the HDSL Range Extenders, the HTU-C M
can be deployed with one or two Low Voltage HREs
and one Low Voltage HTU-R.
The HDSL local loop operates as two independent
subsystems each operating over a single twisted pair.
The HTU-C M communicates over these two twisted
pairs to the HDSL Transceiver Unit Remote end
(HTU-R). Each subsystem carries half of the total
bandwidth along with a small amount of overhead
used for maintenance and performance monitoring.
System power and alarm bus connections are made
through the backplane of the 220 shelf. DSX-1 and
HDSL signals are connected through the wire-wrap
pins or the 50-pin shelf connectors related to each
individual slot.
The HTU-C M contains an onboard fuse. If the fuse
opens, it supplies a -48 VDC voltage to the fuse alarm
bus and all front panel indicators will be off. This fuse
is not field-replaceable.
The 220/E220 HTU-C M uses a DC-to-DC converter
to derive its internal logic and span powering voltages
from the -48 VDC office supply. The 220/E220
HTU-C M can span power HREs and HTU-Rs as
listed above. When used with Low Voltage HREs and
HTU-Rs, the HTU-C M can span power the Low
Voltage HTU-R and Low Voltage HREs at either less
than -140 VDC or at -190 VDC. Span powering
voltages meet all requirements of Class A2 voltages as
specified by Bellcore GR-1089-CORE.
2
Revision History
This is the second issue of this practice. This revision
correct default settings for the SW6 and SW7.

2. INSTALLATION

Unit subject to electrostatic damage or
decrease in reliability. Handling precautions
required.
After unpacking the unit, inspect it for possible
shipping damage. If damage is discovered, file a
claim immediately with the carrier, then contact
ADTRAN Customer Service (see subsection 10).
The 220/E220 HTU-C M plugs directly into standard
220 office repeater shelves. These include Kentrox
T-Term 220, Wescom 34220 and 34230, Lynch
303MA30 as well as the ADTRAN E220 Shelf and
the ADTRAN E220 RP Shelf. No installation wiring
is required.
Electrical Code Compliance
Table 1 shows the UL/CUL Telecommunications
Codes for the 220/E220 HTU-C. The 220/E200
HTU-C complies with the requirements covered under
UL 1459 third edition and is intended to be installed
in an enclosure with an Installation Code (IC) of "B"
or "E."
1. This product is intended for installation
in RESTRICTED ACCESS
LOCATIONS only.
2. Input current at maximum load is 0.7 A
Table 1. UL/CUL Telecommunications Codes
C o d
C I
T C
P C
Section 61246001L2-5, Issue 2
CAUTION:
NOTE:
e n I p t u
A
–
F
O u p t t u
–
X
C
61246001L2-5B