NEC PASOLINK - Page 21

ROI-S04488 FUNCTIONAL OPERATION
2-5/6
Fig. 2-1 Functional Block Diagram of IDU (2/3)
ASC/DSC/ALM INTFC
a
b
c
d
e
f
g
h
P-S
CONV
PLS MON
MUX
SCRB
PAR IT Y
CHECK
TIM
GEN
PCM
CODEC
H
DIF
ENC
DIG
FIL
PLS
MON
MST
CLK
MON
EOW
OUT
EOW IN
EOW
D-A
CONV
D-A
CONV
4PH
MOD
MOD
DEM
EOW
DEM
EOW
MOD
VCO
450 kHz
IF IN/OUT
A
B
C
D
E
DATA UP
DATA DOWN
TX DPU ALM
MOD ALM
F
G
F SYNC ALM
BER ALM
H
I
P-S
CONV
S-P
CONV
MUX ALM 1-4
MOD CW
L BER ALM
H BER ALM
F SYNC ALM
BER ALM
BER THRESHOLD
FRAME ID
q
s
SERIAL ALM
F SYNC ALM
r
SERIAL DATA
Ethernet SW
SPEED CONV
LAN INTFC*
PORT1
PORT2
v
RX FPLS
t
u
16M CLK
RX CLK
i
j
k
l
m
n
o
p
S-P
CONV
DEMUX
TIM
GEN
DSCRB
BER
DET
F SYNC
DIF
DEC
IN
OUT
OUT
IN
DSC/64K/
A-D CONV/LEV CONV
B-U CONV
U-B CONV
64K/SC LAN INTFC*
A-D
CONV
70 MHz
DEM
4 PH
DEM
A-D
CONV
From/To
FIG. 2-1 (1/3)
From/To
FIG. 2-1 (3/3)
DPU
MOD
−43 V DC
INTERFACE
TX FPLS
w
x
TX CLK
VCO
AIS CTRL OFF
CPU CLK
AIS CTRL
y
TERMINAL
Note: * Optional.
10BASE-T/
100BASE-TX
z
WS
IN/OUT
(RJ45)
INTERFACE
TERMINAL
B-U CONV
U-B CONV
WS/SC LAN INTFC*
ASC/EOW
OW/DSC/ASC