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Bell System Practices TOUCH-A-MATIC 2872A1M Identification, Installation, Connections, Operation, And Maintenance page 56

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SECTION
503-603-101
$ TABLE N (Contd) 4
TROUBLE
ANALYSIS
- 2872AIM
OR 2872A2M
,,,
TROUBLE
NUMBER
FAILURE
ADDITIONAL SYMPTOM
POSSIBLE CAUSE
REMEDIAL ACTION
24
Hum or Noise
Unbalanced
Check for unintentional
caused
by electrical
telephone
line
connections
that might
apparatus
(light
cause an unbalanced
dimmer
switch,
etc)
telephone
line
Page
56
56
Pages

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