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.

Self-Node

NEC

NEAX

 

 

 

2400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IMS

1 Local

 

 

2 Remote

 

Loopback

 

 

Loopback

 

 

 

 

 

 

SDT PKG

Distant Node

NEC

NEAX

 

2400 IMS

 

 

 

 

 

 

 

 

 

 

 

SDT PKG

Fusion

Networking

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.

 

 

 

 

 

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).

Operate switch 1 or 2 of the P-SW key to designate the loopback pattern.

SDT (PA-SDTA)

SW11 SW12

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

ND-70185 (E)CHAPTER 6

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NEC NEAX2400 system manual SDT Card Loopback Test