Bell 6B KTS Manual page 48

Key telephone system
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SECTION 5 1 8-4 1 1 - 1 00
DEPRESS
STEP
SWITCH
DIGIT 3 SHOWS
ON VISUAL
DISPLAY
LINK
1
LAMP ON
BUSY TONE
HEARD
YES
LINK
2
LAMP ON
BUSY TONE
HEARD
YES
IS SYSTEM
EQUIPPED WITH
TWO 487A KTUs
NO
Page 48
BSP 518-411-100 -i01 1978-08-48.j pg
IF
IS DISPLAYED
2
DEPRESS SWITCH
NO
AGAIN . IF
STILL
2
DISPLAYED. START
FROM PREPARATION
NO
SEE
TEST
REPLACE
NO
485A OR
486A KTU
NO
SEE
TEST
1
REPLACE
NO
485A OR
486A KTU
YES
Fig. 22- Test 3 Sequence- Busy Tone
Scanned by Frank Harrell, Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 21:12:29
NO
LINK
3
LAMP ON
YES
REPLACE
NO
BUSY TONE
485A OR
HEARD
486A KTU
YES
NO
LINK 4
LAMP ON
YES
REPLACE
NO
BUSY TONE
485A OR
HEARD
486A KTU
YES
END OF
TEST
3
SEE
TEST
1
SEE
TEST
1

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