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l 12
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PAGE
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.
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.
MS
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O N ( P I L O T
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L
A M P IT).
.
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.
B O A R D S
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ARE INSTALLED.
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A , T I E L I N E C O N N E C T I O N
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RTB-A RING
TONES
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ALWAYS
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WT, M.E. CONNECTION EXCHANGE
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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R R B - A LRB-A FOR TIE
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LINE FOR TIE LINE.
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LINES.
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.
.
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.
W I R I N G B E T W E E N
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A N D T I E L I N E
.
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. .
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.
.
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IS
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**
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FAULT AFFECTING
YES
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RINGING OR RING TONE?
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TIE LINE IS THE
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CORRECT
WIRED
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. . . . . . .
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CORRECTLY.
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:
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.
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.
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R E P L A C E
BOARD
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B O A R D .
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:
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* l
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1 4
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PAGE
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. l +
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l **
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.
IS USED FOR RING-IN/RING-OUT TIE LINES.
. . . . . . . . . . . . . . . . . . .
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. . LRB IS USED FOR LOOP-IN/LOOP-OUT TIE LINES.
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.
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C A N
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.
NO
MAIN
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.
.
SEIZE
TIE LINE?
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,
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.
.
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.
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l .******:****m.**
.
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REPLACE
BOARD.
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IF STILL CANNOT SEIZE,
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YES
:
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REPLACE SLB-AN.
.
:
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3 4
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PAGE F29
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1 4
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PAGE t-33
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1 1 1
AN-61 6
ISSUE 1
