Technical Description
3.3 Node Processor Unit (NPU)
The NPU implements the system’s control functions. One NPU is always
required in the subrack. The NPU also provides traffic, DCN and management
interfaces.
The NPU holds a Removable Memory Module (RMM) for storage of license and
configuration information. The following NPUs are available:
3.3.1 Overview
NPU1 B
Fits in an AMM 20p B.
NPU3
Fits in an AMM 2p B, AMM 6p C or AMM 6p D.
NPU3 B
Fits in an AMM 2p B, AMM 6p C or AMM 6p D.
NPU1 B
NPU3
2x(4xE1)
User I/O
10/100BASE-T
O&M
Not used
E
R
I
C
S
S
O
N
NPU
1
B
1
0
/1
0
0
B
a
s
e
-
T
C
o
n
s
o
le
O
&
M
E
1
:
3
A
-
3
D
E
1
:
2
A
-
2
D
U
s
e
r
I/
O
:
1
A
-
1
I
Fault
P
ow
er
BR
RMM
NPU3 B
10036
NPU3
TR:4A-4D
/User Out:E-F
10/100 Base-
T
F
P
O&M
2x(10/100BASE-T)
4xE1 + 2xUser Out
O&M
RMM
E1/
DS1
10/100 Base-
T
LAN
TR:3
NPU3 B
E
1
/D
S
1
1
0
/
1
0
0
/1
0
0
0
B
A
S
E
-
T
1
0
/
1
0
0
/1
000
B
A
S
E
-
T
TR:2/LAN
TR:3
TR:4
A-4D/Use
r Ou
t:E-F
O&M
F
P
2x(10/100/1000BASE-T)
4xE1 + 2xUser Out
O&M
RMM
Figure 19 NPUs
The following summarizes the common functions of the NPUs:
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