Figure 3. Front Panel Features; Figure 4. Rear Panel Features - ADTRAN HDSL 851 Installation And Maintenance Manual

The remote LP1/LP2 signal jacks provide access to
the remote's CO side loop 1 and loop 2 signals. The
DS1 TX and RX signal jacks provide access to the
DS1 signals on a remote line unit installed in the
remote unit slot. These jacks are used when the line
unit front panel does not have jacks for accessing the
DS1 signals. The TX is an input jack and RX is an
output jack.
See Figure 3 for front panel features.
Figure 4 shows the HDSL 851 rear panel power
adapter along with compliance and electrical safety
precautions.
Powering the HDSL Remote Installation Kit
WARNING
On a live HDSL circuit, potentially dangerous
voltage may be present on the loop 1 and loop 2
signals. Use extreme caution when accessing
these signals at the LP1/LP2 jacks.
The ADTRAN HDSL Remote Installation Kit can be
powered by installing cables between its LP1/LP2
Repeater Unit
Slot
LP1 LP2 LP1 LP2
RPTR. C.O. RPTR. TO REMOTE
CABLE PAIRS CABLE PAIRS

Figure 3. Front Panel Features

61190851L2-5C
1190851L2
HDSL 851 REPEATER/REMOTE
CAUTION:
RISK OF ELECTRICAL
SHOCK. MAXIMUM
VOLTAGES UP TO
-200 VDC MAY BE
PRESENT ON TELECOM
CIRCUITS.
Remote Unit
Slot
ESD
GND
RPTR
LP1 LP2 TX RX
IN OUT
DS1
REMOTE
CABLE PAIRS
61190851L2-5, Issue 3
signal jacks and the LP1/LP2 signal jacks on the
Central Office Installation Kit. See the documentation
for the HDSL CO Installation Kit (P/N 1190852L2)
for directions on powering the CO. When span
powering is not available, the unit can be locally
powered by applying -48 Vdc to connectors on the
back of the unit.
Preventing ESD Damage
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
To prevent damage caused by electrostatic discharge
(ESD), follow these precautions when using the HDSL
Installation Kit.
1. Install the ground cable between ground and the
bottom ground lug on the front of the HDSL
Installation Kit.
2. When working with HDSL line units, make sure
your ESD wrist strap is attached to the top ground
lug on the front of the HDSL installation kit.
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesirable
operation.
POWER CODE (PC)
TELECOMMUNICATION CODE (TC)
INSTALLATION CODE (IC)
FOR PROTECTION FROM
ELECTRICAL SHOCK HAZARD,
ENSURE PROPER FRAME GROUND
CONNECTION. FOR USE BY
-48VDC 0.2A
QUALIFIED SERVICE
PERSONNEL ONLY.
— +
USE COPPER
CONDUCTORS ONLY

Figure 4. Rear Panel Features

IN OUT
F C
X X
E -
WARNING
3