Installation - ADTRAN 3192 HTU-C Installation And Maintenance Manual

The HTU-C can be deployed in circuits consisting of
one HTU-C and one HTU-R. When deployment
requires the HDSL Range Extender (HRE), the
HTU-C can be deployed with one Low Voltage HRE
(T400, 239, 439, or 819A) and one Low Voltage
HTU-R.
NOTE
When deployment requires the use of two
HREs, the HTU-C can be deployed with two
HREs (P/N 1244041L2, 1245045L1,
1244044L1, or 1244042L1) and one HTU-R
(P/N 1245026LX).
The HDSL local loop operates as two independent
subsystems each operating over a single twisted pair.
The HTU-C communicates over these two twisted
pairs to the 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 3192 shelf. DSX-1 and
HDSL signals are connected through the wire-wrap
pins or the 64-pin shelf connectors related to each
individual slot.
The HTU-C contains onboard fuses. If a fuse opens,
it supplies a -48 Vdc voltage to the fuse alarm bus and
all front panel indicators will be off. These fuses are
not designed to be field-replaceable.
The 3192 HTU-C uses a DC-to-DC converter to
derive its internal logic and span powering voltages
from the -48 Vdc office supply. The 3192 HTU-C can
span power HREs and HTU-Rs as listed above. When
used with Low Voltage HREs and HTU-Rs, the
HTU-C can be configured to span power the Low
Voltage HTU-R and Low Voltage HRE at either less
than -140 Vdc or at -190 Vdc (for applications
requiring two HREs and an HTU-R). Span powering
voltages meet all requirements of Class A2 voltages as
specified by Bellcore GR-1089-CORE.
Revision History
This practice has been reissued to a incorporate a CLEI code
change.
2

2. INSTALLATION

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 of this
practice).
The 3192 HTU-C plugs directly into standard CI
Wescom 3192 office repeater shelves. The unit may
be plugged into any of the first 28 slots of the 3192
shelf. No installation wiring is required.
One three-position slide switch (SW1), one
eight-position rotary switch (SW2) and one
four-position Dipswitch pack (SW3) are used to
configure the mode of operation. Figure 2 shows the
location of these switches.
A definition of each switch is shown in Tables 1, 2,
and 3. Configuration changes must be performed by
manually selecting each option switch. The HTU-C
transfers the local configuration to the HTU-R when
circuit synchronization is achieved. The HTU-R then
sets its configuration to match the HTU-C.
Position
AIS ................ Upon Customer Loss of Signal (DS1) at the
LBK .............. Upon Customer Loss of Signal (DS1) at the
CDI 1
.......................
1
The CDI is generated by transmitting the framing received from the network while
overwriting the payload with a repeating pattern. For applications where the DS1
is Extended Superframe, the data link is overwritten with a Yellow Alarm that is
interrupted once every second by a 100-millisecond code burst of FE (HEX).
Section 61245004L6-5, Issue 4
C A U T I O N ! C A U T I O N
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
Table 1. SW1 Option Settings
Description
terminating end of the HDSL circuit, AIS is generated
from the HTU-R toward the network.
terminating end of the HDSL circuit, a logical
network loopback is initiated at the HTU-R.
Customer Disconnect Indication. Upon Customer
Loss of Signal (DS1) at the terminating end of the
HDSL circuit, the HTU-R returns DS1 Idle Signal
to the network.
61245004L6-5D