ISS 1 , SECTION 5 1 8-4 1 1 - 1 00
DEPRESS
LINK 3
NO
SEE
STEP
LAMP ON
TEST
1
SWITCH
YES
IF 1 IS DISPLAYED
AUDIBLE
NO
REPLACE
DIGIT 2 SHOWS
NO
DEPRESS SWITCH
RINGBACK
485A OR
ON VISUAL
AGAIN . IF 1 STILL
HEARD.
48SA KTU
DISPLAY
DISPLAYED, START
FROM PREPARATION.
LINK 4
NO
SEE
LINK 1
NO
SEE
LAMP ON
TEST
1
LAMP ON
TEST
1
YES
AUDIBLE
NO
REPLACE
AUDIBLE RING-
NO
REPLACE
RINGBACK
485A OR
BACK HEARD.
485A OR
HEARD .
4BSA KTU
( NOTE )
48SA KTU
YES
LINK 2
NO
SEE
LAMP ON
TEST
1
NOTE : IF SYSTEM IS EQUIPPED
WITH SINGLE SPURT AUDIBLE
RINGBACK OPTION , THE AUDIBLE
RINGBACK TONE WILL BE
AUDIBLE
NO
REPLACE
CONTINUOUS FOR THE TEST .
RING BACK
4B5A OR
HEARD.
4BSA KTU
IS SYSTEM
YES
EQUIPPED WITH
TWO 4B7A KTUs
NO
END OF
TEST 2
Fig. 2 1 -Test 2 Sequence-Audible Ringback
Page 47
BSP S18-411·100-i01 1978-08-47.jpg Scanned by Frank Harrell, (Cowbo Frank) Castle Rock, Colorado Oct 1S, 2012 21:12:11