TELEPHONE INTERFACE MODULE (TIM)
14-9
oscillator of U211 running at
≈
3.7 kHz. With U244,
pin 12 low the output of U210, pin 9 is a “1” (U210,
pin 12 is constantly being retriggered). If a transient
“0” during a logic “1” is encountered at the E-Lead,
U210, pin 7 is retriggered causing U211, pin 3 to go
high for 5 ms. This will not change the output of
U211, pin 9 because it is being retriggered. If U211,
pin 3 stays high longer than 10 ms, U211, pin 9 goes
low. For this to occur, the transient would need to
exceed 10 ms.
Figure 14-13 4-WIRE E&M BLOCK DIAGRAM (-680)
Содержание 3000 SERIES
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Страница 83: ...CHANNEL INTERFACE MODULE CIM 8 7 Figure 8 3 SUMMATION BOARD ALIGNMENT POINTS DIAGRAM ...
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Страница 142: ...TELEPHONE INTERFACE MODULE TIM 14 32 This page intentionally left blank ...
Страница 146: ...VOTER DIAGNOSTICS MODULE VDM 15 4 This page intentionally left blank ...
Страница 148: ...POWER TERMINATION MODULE PTM 16 2 Figure 16 1 POWER TERMINATION MODULE ALIGNMENT POINTS DIAGRAM ...
Страница 156: ...VOICE TONE MODULE VTM 18 4 This page intentionally left blank ...
Страница 164: ...WIDE AREA MODULE WAM 19 8 This page intentionally left blank ...
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Страница 178: ...POWER SUPPLY 22 4 Figure 22 6 POWER SUPPLY DRAWER ...
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Страница 214: ...Part Number 001 3139 005 10 03 Printed in U S A ...