CTC Union FMUX-01, User Manual

Page: 47 / 59

Chapter 5. Loop Back Testing
5-1
FMUX-01Mar 2003
5.1 General
In this chapter we shall explain the functioning of the loop back modes available in
the MULTIPLEXER UNIT. As of printing of this manual (F/W ver. 1.03) 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 and
T1 4-Channel Port Cards.
5.2 Loop Back Modes
Optical Section
* 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)