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23
CHAPTER 4: Test Procedures
Figure 4-6. Check loop flow chart (2 of 3).
SIGNAL
LEVEL TOO
LOW
SWITCH TO
REVERSE, DO
CONTINUITY TEST
A
LEVEL
TEST STATUS?
GRN
RED
PUT BACK IN
NORMAL MODE,
PUT IN LEVEL
TEST MODE
TEST STATUS?
PROBLEM WITH
TX PAIR
LINE
CONTINUITY
TEST STATUS?
NT1 OR
SWITCH NOT
WORKING
OPEN IN
RX PAIR
CONTINUITY
TEST STATUS?
OPEN IN
TX PAIR
B
GRN
RED
GRN
RED
GRN