Section 150-611-103
Revision 01
Page 13
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DS1 TI
P
DS1 RI
N G
DS1 TI
P1
DS1 RI
NG 1
39
40
41
42
43
44
45
46
47
48
49
50
-48 V
* FUSEALARM I
SNO RM ALLYFLO ATI
NG AND AT-48 V
W HEN AC TI
VATED
**M I
NO R ALARM C O NTAC TS(PI
NS 20 AND 21)ARE
NO RM ALLYO PEN AND C LO SEUPO N ALARM
1
2
3
4
5
6
7
8
9
10
11
FUSEALARM *
VHDSL TI
P1
VHDSLRI
NG 1
KEY
26
27
28
29
30
31
32
33
34
35
36
37
38
12
13
ALRM **
D
S
X
1
KEY
Figure 4. HLU-611 Pin-outs.
CAUTION
The HLU-611 is incompatible with the
newer Kentrox 224 shelves when these
shelves are optioned to connect their -V
line (which is normally -48V to -130V). The
-V line connects to pin 40. The HLU-231
connects pin 40 to 39 and pin 39 to -48V,
which causes the conflict.
11. TESTING
11.01
Tables 3 through 8 provide step by step test
procedures for the HLU-611 Unit 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.
11.02
The HLU’s 4 character front panel display
has many useful system diagnostic
messages. They are listed in Table 9. This display
turns on when power is initially applied to the 611.
In order to conserve power, it only remains on for 5
minutes if neither the MODE nor SEL buttons are
depressed. The use of either button restarts the 5
minute power-control timer.
11.03
If trouble is encountered on the DSX-1
interface, verify that the hit is making a
positive connection with the mounting assembly’s
connector. Also, verify that the pre-equalizer is
properly set. All installations should be set to the
largest value that does not exceed the distance from
the DSX-1 to the shelf
11.04
The transmit and receive T1 DSX-1 ports
have splitting access and bridging miniature
210 jacks as shown in Figure 2. Connecting one
cable between the two BDG jacks and another
between the two SPAN jacks splits the XMT and
RCV and creates metallic loopbacks towards both
the DSX-1 and the HLU.
11.05
Figure 7 shows the HLU status screen. It
contains useful information on the VHDSL
loops and the DS1 input. Figures 11, 12 & 13 show
the performance data & alarm history screens. All
the performance data shown in Figures 8 , 11 & 12
can be cleared to zero by selecting the (C)lear
option from the HLU Status Screen shown in Figure
7. Note that since the HLU is considered the master
module, this clears all performance data screens at
both the HLU & the HRU. Clearing the data from
the HRU only clears performance data at the HRU.
It does not clear it at the HLU.
