Bell 6B KTS Manual page 51

Key telephone system
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BSP 518·411·100·i01 _1978-08·5l.jpg
DEPRESS
STEP SWITCH
YES
END OF
TEST 7
Fig. 26- Test 7 Sequence-Ring Rate
Scanned by Frank Harrell, (Cowboy Frank) Castle Rock, Colorado Oct 15, 2012 21:13:33
NO
DISPLAY
BLANK
REPLACE 485A OR 486A
KTU DR REMOVE 484A
KTUs ONE AT A TIME
UNTIL DISPLAY SHOWS
RING RATE . REPLACE
DEFECTIVE KTU .
ISS 1 , SECTION 5 1 8-4 1 1 - 1 00
IF 6 IS DISPLAYED
DEPRESS SWITCH
AGAIN . IF 6 STILL
DISPLAYED , START
FROM PREPARATION .
Page 5 1

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