NEC PASOLINK - Page 24

ROI-S04488 FUNCTIONAL OPERATION
2-11/12
Fig. 2-2 Functional Block Diagram of IDU in 1+1 System (2/4)
D-A
CONV
DEM
EOW
DEM
EOW
MOD
IF IN/OUT
A
B
DATA UP
DATA DOWN
C
D
E
CPU CLK
TX DPU ALM
MOD ALM
F
G
H
I
J
BER ALM
F SYNC ALM
DEM ALM
450 kHz
–43 V DC
4 PH
MOD
D-A
CONV
DIG
FIL
DIF
ENC
SCRB
PAR ITY
CHECK
MUX
PLS
MON
MST
CLK
MON
TIM
GEN
P-S
CONV
PLS MON
TX FPLS
TX CLK
g
s
y
SERIAL ALM
F SYNC ALM
AIS CTRL
From/To
FIG. 2-2 (1/4)
S-P
CONV
S-P
CONV
MUX ALM 1-4
H BER ALM
L BER ALM
F SYNC ALM
BER ALM
MOD CW
AIS CTRL OFF
BER THRESHOLD
FRAME ID
4 PH
DEM
70 MHz
DEM
A-D
CONV
A-D
CONV
BER
DET
F SYNC
DIF
DEC
DSCRB
TIM
GEN
DEMUX
RX FPLS
12M CLK
RX CLK
IF IN/OUT
From/To
FIG. 2-2 (3/4)
No. 2 MD UNIT
(SAME AS ABOVE)
21
CLK MON
RX
SW
H
H
H
H
H
H
H
H
h
g
f
e
d
c
b
a
x
w
H
H
SW
RX
SW
ETHERNET SW
SPEED CONV
PORT2
PORT1
10 BASE-T
100 BASE-TX
EOW
IN/OUT
LAN INTFC *
p
o
n
m
l
k
j
i
u
t
v
RX SW/
HL SW
RX
SW
To RX SW
RX SW CONT
6
From FIG. 2-2 (4/4)
H
ASC/DSC/ALM INTFC *
B-U CONV/DPU
U-B CONV/DPU
64K/SC LAN INTFC *
H
IN
OUT
OW/DSC/ASC
IN
OUT
DSC/64K/
RX CLK LOSS
From/To FIG. 2-2 (4/4)
43
MPX
DPU
No. 1 MD UNIT
SW UNIT
From/To
FIG. 2-2 (3/4)
Note: * Optional.
From/To
FIG. 2-2 (1/4)
DATA UP
DATA DOWN
CPU CLK
TX DPU ALM
MOD ALM
DEM ALM
F SYNC ALM
BER ALM
K
L
M
O
N
P
Q
R
S
T
From/To FIG. 2-2 (4/4)
TX CLK LOSS
From/To
FIG. 2-2 (1/4)
MDP
850 MHz
VCO
PCM
CODEC
MOD
P-S
CONV
CLK MON
H
WS/SC LAN INTFC *
IN
OUT
WS/SC LAN
B-U CONV/DPU
U-B CONV/DPU
SW
ASC/EOW
SERIAL ALM
SYS ALM
SYS CTRL
SYS ALM
SYS CTRL
A-D CONV/
LEV CONV
(RJ45)