CTC Union FMUX-01A Manuel d'utilisateur télécharger pdf (Page 49)

Chapter 5. Loop Back Testing

43 Version 1.2 Apr 2006

5.1 General

In this chapter we shall explain the functioning of the loop back modes available in the Fiber

Multiplexer. The loop back modes available include Local, Remote, and Remote Request Loop

Backs for the Optical interface and the secondary Optical interface (if redundant) as well as Local

Loop Back, Near End Loop Back, Remote Loop Back, and Request Remote Loop Back for the E1,

T1 and Data communication 4-Channel Port Cards.

5.2 Loop Back Modes

5.2.1 Optical Loop Back

* LLB (Optical local loop back)

near end (NE) far end (FE)

* RLB (Optical Remote loop back)

near end (NE) far end (FE)

* RRLB (Request optical remote loop back)

near end (NE) far end (FE)

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CTC Union FMUX-01A Manuel d'utilisateur Page 49