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ND-70185 (E) CHAPTER 6
Page 145
Revision 3.0
POST INSTALLATION TEST
SDT Card Loopback Test
5. SDT Card Loopback Test
The patterns for loopback test, which can be set by the SDT card, are as follows:
1. Local Loopback
Loopback tests are performed only on the SDT card at the self-node.
2. Remote Loopback
Loopback tests are performed between different nodes. The result of this test can be confirmed not at the
self-node, but at the distant node.
Figure 6-14 Loopback Points of SDT Card
• Test Procedure
STEP 1: Designate the loopback test pattern by setting the P-SW key on the SDT (PA-SDTA) card (see Figure
6-15).
Figure 6-15 Loopback Setting by P-SW key on PA-SDTA Card
Remote
Loopback
SDT PKG
2
N
E
C
N
E
A
X
2
4
0
0
I
M
S
N
E
C
N
E
A
X
2
4
0
0
I
M
S
Fusion
Self-Node
Distant Node
Diagnosis
Test Result (1) NG: Error detection at self-node.
Test Result (1) OK, (2) NG: Error detection on optical fiber line or distant node side.
Local
Loopback
1
SDT PKG
Networking
Operate switch 1 or 2 of the P-SW key to designate the loopback pattern.
SDT (PA-SDTA)
SW11 SW12