5
Section 61246001L2-5, Issue 2
61246001L2-5B
Table 4. Front Panel Indicators
D
E
L
n
o
i
t
a
c
i
d
n
I
n
o
i
t
p
i
r
c
s
e
D
1
P
L
f
f
O
d
e
R
w
o
l
l
e
Y
n
e
e
r
G
g
n
i
k
n
i
l
B
.
n
o
i
t
a
z
i
n
o
r
h
c
n
y
s
o
N
1
>
(
1
p
o
o
L
n
o
y
t
i
l
a
u
q
l
a
n
g
i
s
r
o
o
P
0
7
-
.
)
R
E
B
(
1
p
o
o
L
n
o
y
t
i
l
a
u
q
l
a
n
g
i
s
l
a
n
i
g
r
a
M
<
1
e
v
o
b
a
n
i
g
r
a
m
B
d
2
0
7
-
.
)
R
E
B
1
e
v
o
b
a
n
i
g
r
a
m
B
d
2
>
(
1
p
o
o
L
n
o
y
t
i
l
a
u
q
l
a
n
g
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s
d
o
o
G
0
7
-
.
)
R
E
B
.
1
p
o
o
L
f
o
d
n
e
r
e
h
t
i
e
n
o
r
o
r
r
e
d
e
t
c
e
t
e
D
2
P
L
f
f
O
d
e
R
w
o
l
l
e
Y
n
e
e
r
G
g
n
i
k
n
i
l
B
.
n
o
i
t
a
z
i
n
o
r
h
c
n
y
s
o
N
1
>
(
2
p
o
o
L
n
o
y
t
i
l
a
u
q
l
a
n
g
i
s
r
o
o
P
0
7
-
.
)
R
E
B
(
2
p
o
o
L
n
o
y
t
i
l
a
u
q
l
a
n
g
i
s
l
a
n
i
g
r
a
M
<
1
e
v
o
b
a
n
i
g
r
a
m
B
d
2
0
7
-
.
)
R
E
B
1
e
v
o
b
a
n
i
g
r
a
m
B
d
2
>
(
2
p
o
o
L
n
o
y
t
i
l
a
u
q
l
a
n
g
i
s
d
o
o
G
0
7
-
.
)
R
E
B
.
2
p
o
o
L
f
o
d
n
e
r
e
h
t
i
e
n
o
r
o
r
r
e
d
e
t
c
e
t
e
D
X
S
D
f
f
O
g
n
i
k
n
i
l
B
d
i
l
o
S
t
o
n
s
e
o
d
t
a
h
t
t
a
m
r
o
f
a
f
o
s
i
r
o
t
n
e
s
b
a
s
i
l
a
n
g
i
s
1
-
X
S
D
e
d
i
s
-
k
r
o
w
t
e
N
.
t
i
u
c
r
i
c
L
S
D
H
e
h
t
f
o
g
n
o
i
s
i
v
o
r
p
e
h
t
h
c
t
a
m
r
o
r
r
e
C
R
C
r
o
,
)
e
d
o
m
F
S
(
r
o
r
r
e
t
i
b
e
m
a
r
f
,
)
V
P
B
(
n
o
i
t
a
l
o
i
V
r
a
l
o
p
i
B
.
l
a
n
g
i
s
1
-
X
S
D
t
a
d
e
t
c
e
t
e
d
)
e
d
o
m
F
S
E
(
.
d
e
z
i
n
o
r
h
c
n
y
s
d
n
a
t
n
e
s
e
r
p
s
i
l
a
n
g
i
s
1
-
X
S
D
e
d
i
s
-
k
r
o
w
t
e
N
M
L
A
f
f
O
d
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R
w
o
l
l
e
Y
.
d
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t
c
e
t
e
d
n
o
i
t
i
d
n
o
c
m
r
a
l
a
o
N
d
n
a
y
l
l
a
c
o
l
r
o
,
)
C
-
U
T
H
(
y
l
l
a
c
o
l
r
e
h
t
i
e
d
e
t
c
e
t
e
d
n
o
i
t
i
t
n
o
c
m
r
a
l
A
.
)
R
-
U
T
H
d
n
a
C
-
U
T
H
(
y
l
e
t
o
m
e
r
.
d
e
t
c
e
t
e
d
n
o
i
t
d
i
d
n
o
c
m
r
a
l
a
e
t
o
m
e
R
K
B
L
f
f
O
g
n
i
k
n
i
l
B
d
i
l
o
S
.
e
t
a
t
s
d
e
m
r
a
r
o
k
c
a
b
p
o
o
l
n
i
t
o
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s
i
t
i
n
U
e
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a
t
s
s
i
h
t
n
I
.
d
e
t
c
e
t
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d
n
e
e
b
s
a
h
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e
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q
e
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g
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m
r
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b
p
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h
T
.
k
c
a
b
p
o
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l
n
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t
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n
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b
)
k
c
a
b
p
o
o
l
r
o
f
y
d
a
e
r
(
d
e
m
r
a
s
i
t
i
n
u
.
e
v
i
t
c
a
s
i
k
c
a
b
p
o
o
l
)
C
-
U
T
H
(
l
a
c
o
L
The HTU-C M can be optioned via SW2 to adjust the
span powering voltage at either less than -140 VDC or
-190 VDC. If two HREs are used in the HDSL
circuit, then the voltage will be -190 VDC.
HTU-C Alarm Outputs
Pin 32 of the HTU-C edge connector interface
provides a fuse alarm signal that connects -48 VDC to
this pin in the presence of a blown fuse. This
indicates the card has malfunctioned and should be
replaced.
HFAC Alarm Outputs
If the HTU-C M is operating in an ADTRAN E220 or
E220 RP Shelf with an HFAC (P/N 1244051LX or
equivalent), the HTU-C M provides information to the
HFAC which is used to generate alarms. The HFAC
alarm outputs are separate from the HTU-C M alarm
pin mentioned above. For more information on the
HFAC controlled alarms, see the HFAC Installation
and Maintenance practice, section 61244051LX-5.
4. HDSL SYSTEM TESTING
The ADTRAN HDSL system provides the ability to
monitor the status and performance of the DSX-1
signals, DS1 signals, and HDSL loop signals.
Detailed performance monitoring is provided by the
faceplate mounted RS-232 Control Port. These
features are valuable in troubleshooting and isolating
any system level problems that may occur at
installation or during operation of the HDSL system.
The following subsections describe additional testing
features.
HTU-C M DSX EQ Bantam Jacks
The front panel of the HTU-C contains both
monitoring and metallic splitting Bantam jacks. In
general, the monitoring jacks provide a non-intrusive
tap onto a signal line that permits the connection of
test equipment to monitor the characteristics of that
signal. For example, the DSX-1 monitor jack can be
used to connect to a bit error rate tester to monitor for
synchronization, test patterns, etc. The metallic
TX
RX
TX
RX
AMI
UFRM
SF
EN
EN
B8ZS
FRM
ESF
NIU LB DIS
LBK TIMEOUT DIS
H
D
S
L
M
O
N
E
Q
HTU-CM
R
S
2
3
2
1246001L2
133
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