
T400 Controller Facilities Manual
667/EB/20200/000 Page 25-8 Issue 9
Figure 25.1 - Ancillary Processor PCB Layout
ON
S1 - 2/4 Wire Selector
S4 - 600
Ω
/ High Impedance Selector
600
Ω
Hi-Z
LP2 - Carrier Detect
LP3 - Transmit Confirm
LP4 - Watchdog Fail
Status LED’s
SK2 - Reply Line Jack Socket
SK3 - Control Line Jack Socket
S3 - Line Level Switch
SK1 - 6-Way Telecom Socket
Lithium Battery Switch - S2
Lithium Battery - B1
Covered Area
PLA
40-Way
Extended
System Bus
Connector
PLB
60-Way
Connector
to LMU
Inputs
Push down this
side for ‘open’
switch (i.e. ‘0’)
Serial No.
Cover Fixings
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