Section 150-619-100
Revision 01
Page 8
B. INSTALLATION AND TESTING
6. INSTALLATION
6.01
Upon receipt of the equipment, visually
inspect it for signs of damage. If the equipment has
been damaged in transit, immediately report the
extent of damage to the transportation company and
to PairGain.
6.02
The HLU-619 mounts in the group of both
wire-wrapped and connectorized shelves listed in
Section A Paragraph 1.02. The HLU-619 slot pin-
outs are shown in Figure 3.
7. TESTING
7.01
Section D provide step-by-step test
procedures for the HLU-619 as a function of the
loopback option selected. These procedures allow
verification of the integrity of the VHDSL channel to
the HRU-612 remote unit as well as the DS1
channels to the customer and the local DSX-1
interface.
7.02
The HLU-619’s four-character front panel
display has many useful system diagnostic
messages. They are listed in Table 3. This display
turns on when power is initially applied to the HLU-
619. To conserve power, the display remains on for
only five minutes when neither the Mode nor SEL
buttons are pressed. The use of either button
activates the four-character display and restarts the
five-minute power control timer.
7.03
If trouble is encountered on the HLU-619
DSX-1 interface, verify that the HLU-619 is making a
positive connection with its mounting assembly
(shelf) connector. Also, verify that the HLU-619
equalizer is set to the correct distance range (see
EQL in Table 2). All installations should be set to
the largest distance range value that does not
exceed the distance from the DSX-1 to the shelf.
7.04
The transmit and receive DSX-1 ports have
splitting access and bridging miniature 210 jacks
(see Figure 2). Connecting one cable between the
two Bridging jacks, and another between the two
Span jacks, splits the XMT and RCV and creates
metallic loopbacks toward both the DSX-1 and the
HLU-619. If plugs are inserted into both Line jacks,
the BRG jacks can be used to send and receive test
patterns toward the DSX-1.
7.05
Viewing Maintenance Terminal Menu
Screens. Figures 6 through 12 shows the HLU-619
maintenance menu screens. It contains useful
information on the VHDSL loops and the DS1 input.
Figures 10, 11 and 12 show the Performance Data
and Alarm History screens. All the performance
data shown in Figures 10 and 11 can be cleared to
zero by selecting the (C)lear option from the HLU-
619 Status Screen shown in Figure 7.
Note that since the HLU-619 is considered the
master module, this clears all Performance Data
screens at both the HLU-619 and the HRU-612.
The Performance Data can not be cleared from the
HRU-612. See the Glossary in Section 19 for
definitions of Maintenance Menu termonology.
3
4
5
6
C
D
E
F
H
7
8
J
9
K
10
L
G N D
V H D S L 1 -T
V H D S L 1 -R
V H D S L 2 -R
V H D S L 2 -T
M N R A LM **
N M A B U S
F R A M E G N D
-4 8 V B AT
F U S E A LA R M *
FA C TO R Y B U R N -IN
(D O N O T U S E )
1
A
D S 1 T X -T
D S 1 T X -R
2
B
D S 1 R C V -T1
D S 1 R C V -R 1
FUSE ALARM:
MNRALM:
Normal = +5 to -60 Vdc Maximum
Activated = +5 V, 10mA Maximum
Normal = 0 to -60 Vdc Maximum
Activated = -48 Vdc, 10mA Maximum
*
**
Figure 4.
HLU-619 Card-Edge Connectors.
The active pins are highlighted in black in the
above illustration.
