Bell 6B KTS Manual page 49

Key telephone system
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DEPRESS
STEP
SWITCH
DIGIT 4 SHOWS
ON VISUAL
DISPLAY
LINK 1
LAMP ON
ERROR TONE
HEARD
YES
LINK
2
LAMP ON
ERROR TONE
HEARD
IS SYSTEM
EQUIPPED WITH
TWO 487A KTUs
NO
BSP 518-411-100-i01_1978-08-49.jpg
IF 3 IS DISPLAYED
DEPRESS SWITCH
NO
AGAIN . IF 3 STILL
DISPLAYED, START
FROI'I PREPARATION
NO
SEE
TEST
1
REPLACE
NO
485A OR
486A KTU
NO
SEE
TEST
1
REPLACE
NO
485A OR
486A KTU
YES
Fig. 23- Test 4 Sequence-Error Tone
Scanned by Fra n k H arrell, (Cowboy Frank) Castle
ISS 1 , SECTION 5 1 8-4 1 1 - 1 00
NO
LINK 3
LAMP ON
YES
REPLACE
NO
ERROR TONE
485A OR
HEARD
486A KTU
YES
NO
LINK 4
LAI'IP ON
YES
NO
ERROR TONE
HEARD
YES
END OF
TEST 4
SEE
TEST
1
SEE
TEST
1
REPLACE
485A DR
486A KTU
Page 49

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