Testing; Figure 4. Ocu Loopback At The Dds-Dp; Figure 5. Dds-Dp Bidirectional Loopback; Table 3. Led Indication - ADTRAN Total Reach DDS-DP 5 Series Installation And Maintenance Manual
Total reach all-rate dds dataport
Hide thumbs
Also See for Total Reach DDS-DP 5 Series:
- Installation and maintenance manual (9 pages) ,
- Installation and maintenance manual (8 pages)
Advertisement
Span Power
Span powering is accomplished using -130 VDC
measured from Tip to Ring. Voltage measured from
Tip to GND should be -130 VDC or less depending on
voltmeter impedance. Voltage from Ring to GND
should indicate approximately 0 V.
Synchronization and LED Indication
The DDS-DP and DDS-R typically require 30 to 90
seconds to achieve synchronization. Once
synchronized, the SYNC LOSS indicator LED will
turn OFF. If synchronization cannot be achieved,
check the T/R pair for open or short circuit conditions
or load coils. See Table 3 for LED indications.
Table 3. LED Indication
n I
d
c i
t a
r o
S
X
O
N
i
d n
c i
t a
h t
l e
c o
l a
o l
r p
p o
r e
D
D
S
(
D
D
S
R -
. )
S
Y
N
C
O
N
n i
i d
a c
e t
t
e h
D
D
- S
D
f
r o
o c
t n
n i
i u
a
n b
r o
m
l a
i l
N
E
C
R
C
O
N
n i
i d
a c
e t
n i
o c
m
i
g n
a d
a
n b
r o
m
l a
i l
D
D
- S
D
P
(
N
F
E
C
R
C
O
N
n i
i d
a c
e t
o t
w
a
d r
t s
e h
a
n b
r o
m
l a
i l
D
D
S
R -
F (
A
Q
M
O
N
n i
i d
a c
e t
i D
c s
n o
e n
t c
D
S
U
Y
l e
o l
w
n i
i d
c
s u
o t
m
r e
D
D
D
- S
. R
i D
f
a r
m
i
g n
p
t t a
D
S
U
C /
S
U
G
e r
n e
i
d n
c i
D
S
U
C /
S
U
M
A
N
O
N
i
d n
c i
t a
e s
e l
t c
d e
u
i s
L
B
K
O
N
i
d n
c i
t a
a
t c
v i
t a
o i
, n
l F
s a
i h
g n
f i
o l
p o
a b
k c
o t
4
D
e
c s
i r
t p
o i
n
s e
o n
e s
i l a
g n
c
r u
e r
t n
p
e r
e s
p o
c ;
e h
k c
f
r o
o c
t n
n i
i u
y t
a
d n
t
r e
m
n i
i t a
n o
t a
e r
m
o
e t
e
d n
t s
a h
t t
e h
e r
s i
o n
y s
c n
e b
w t
P
a
d n
t
e h
e r
m
o
e t
D
D
S
R -
c ;
, y t
o l
d a
o c
s l i
a ,
d n
o
h t
r e
e n
o c
d n
i t i
n o
. s
t s
a h
t t
e h
e r
a
e r
r e
o r
s r
n o
a t
r t s
a e
m
c ;
e h
k c
o f
t r
e h
e n
o c
d n
t i
o i
s n
l c
s o
r e
o t
t
e h
E
A
R
E
N
D
. )
t s
a h
t t
e h
e r
a
e r
r e
o r
s r
c o
u c
e r
m
o
e t
D
D
S
R -
c ;
e h
k c
o f
e n
o c
d n
t i
o i
s n
l c
s o
r e
o t
t
e h
R
E
N
D
. )
t s
a h
t t
e h
Q
u
i l a
y t
M
n o
t i
r o
h
s a
o
c c
r u
e r
. d
a c
e t
t s
e h
a
s b
n e
e c
o
t f
e h
S
U
C /
S
U
s a
d
t e
r e
m
n i
d e
y b
c s
n o
e n
t c
d e
D
S
U
C /
S
U
i ,
v n
r e
, n
r o
o n
R
X
s
g i
a n
f l
o r
m
r t
g i
e g
s r
a
y
l e
o l
w
L
E
. D
t a
s e
r p
s e
n e
e c
o
t f
e h
c
s u
o t
s a
d
t e
r e
m
n i
d e
y b
t
e h
D
D
- S
s e
a r
e t
h
s a
e b
n e
m
a
u n
l a
y l
g n
S
W
. 1
s e
O
C
U
r o
C
S
U
o l
p o
a b
k c
r o
f i
a
D
S
6
s
s e
i s
n o
s i
a
t c
v i
D
D
S
R -
h
s a
a
t c
v i
t a
d e
D
D
- S
w
r a
s d
c
s u
o t
m
. r e
Section 61433105L1, Issue 6
4. TESTING
Testing for the DDS-DP is accomplished using the
same test procedures for 4-wire OCU and OCU DP
units.
If 64 kbps is selected, the unit will only respond to
latching loopback sequences.
sequences are not valid at this rate.
DDS DP Bidirectional Loopback Support
The DDS DP will execute a bidirectional loopback
when performing an OCU loopback at the DDS-DP as
shown in Figure 4. During a bidirectional loopback
the DDS-R enables test data to pass through the
4-wire interface to the customer premises. This
allows a standard portable test set at the customer
premises to verify the integrity of both the 4-wire and
t n
n o
2-wire loops by transmitting a test pattern to the DDS
DP and examining the returning data for
synchronization and errors. A bidirectional loopback
and pass through is shown in Figure 5. During a
e
n e
bidirectional loopback initiated at the DDS DP the
e h
k c
DDS-R LBK LED will flash. Refer to remote unit
documentation for LED descriptions.
t
e h
i r r
g n
t r
e h
t
e h
l a
d i
Figure 4. OCU Loopback at the DDS-DP
t
e h
Series 5
m
r e
DDS-DP
. R
. e
D
P
Figure 5. DDS-DP Bidirectional Loopback
NOTE
Series 5
DDS-DP
Intra-office
Customer
OCU
Bidirectional
loopback
DDS-R
Bidirectional
loopback
Alternating
Test
Unit
Data
Pass-Through
61433105L1-5F
Advertisement
