Sdt Card Loopback Test; Figure 6-14 Loopback Points Of Sdt Card; Figure 6-15 Loopback Setting By P-Sw Key On Pa-Sdta Card - NEC NEAX 2400 IPX Manual

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 illustrates the loopback points of the SDT card.
Self Node
NEAX 2400 IPX
1 Local
Loopback
SDT PKG
Diagnosis
Test Result (1)
Test Result (1)
• Test Procedure
STEP 1: Designate the loopback test pattern by setting the P-SW key on the SDT (PA-SDTA) card. Refer to
Figure 6-15.
Operate switch 1 or 2 of the P-SW key to designate the loopback pattern.
SW11 SW12

Figure 6-15 Loopback Setting by P-SW key on PA-SDTA Card

2 Remote
Loopback
NG: Error detection at self-node.
OK, (2) NG: Error detection on optical fiber line or distant node side.

Figure 6-14 Loopback Points of SDT Card

SDT (PA-SDTA)
Fusion
Networking
NDA-24299
POST INSTALLATION TEST
SDT Card Loopback Test
Distant Node
NEAX 2400 IPX
SDT PKG
CHAPTER 6
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