ADC H2TU-C-319 List 4E Network Card User Manual


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Appendix B - Functional Operation LTPH-UM-1049-02, Issue 2
72 January 9, 2002 H2TU-C-319 List 4E
APPENDIX B - FUNCTIONAL OPERATION
ADC HDSL2 technology provides full-duplex services at standard DS1 rates over copper wires between an
H2TU-C and an H2TU-R, which comprise one HiGain HDSL2 system. HiGain HDSL2 systems use ADC
Overlapped Pulse Amplitude Modulation (PAM) Transmission with Interlocking Spectra (OPTIS) transceiver
systems to establish full-duplex, 1.552 kbps data channels between the H2TU-C and a remotely located H2TU-R.
Figure 36 shows a block diagram of the H2TU-C. The H2TU-C receives a 1.544 Mbps DSX-1 data stream from
the DSX-1 digital cross connect interface. The H2TU-C contains a DS1 frame synchronizer controlled by an 8-bit
microprocessor that determines the type of framing on the DS1 stream and synchronizes to it. The H2TU-C
recognizes Superframe (SF), including D4, or Extended Superframe (ESF) framing.
Figure 36. H2TU-C-319 List 4E Block Diagram
Status
RS-232
7
User option
Frame GND J
-48V BATT.8
LOS Alarm Bus H
GND 5
Fuse Alarm 10
H2TU-C-319, L4E
AIS
ADS1
Option
control
Micro
I/O
T1
Payload
(MUX)
IN
OUT
R
A
U
X
M
U
X
D
S
X
-
1
D
S
X
-
1
R
R1
R1
T
T
T1
T1
1
1
19
A
2
2
20
B
LOS
S3
S3
S1
9
K
M
M
MONF
MONE
M
M
A
A
A
A
C
C
C
C
F
r
a
m
e
r
H
D
S
L
2
T
r
a
n
s
c
e
i
v
e
r
R
T
T
e
s
t
J
a
c
k
s
M
U
X
L
I
U
E
q
u
a
l
i
z
e
r
(a)
s
e
l
e
c
t
E
q
u
a
l
i
z
e
r
(a)
s
e
l
e
c
t
A
u
x
L
I
U
Mode SEL
(ACO)
HMU control
HDSL2 SPAN
S3
IN
OUT
(a) Depends on setting of the ADS1 option
M = MUX or SPTF
A = Auxiliary
C = CTHR (Cut-through) or SPTE
MONF = Monitor Facilities
MONE = Monitor Equipment
SPTF = Split Facilities
SPTE = Split Equipment
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