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Overview
F
P
RONT
ANEL
Figure 2
shows the FRC-753 front panel.
Unit front panel LEDs.
To reduce power at the RT, the LEDs extinguish after a 2-minute timeout period. Press and hold the ACO button
on the RTLU for two seconds to re-activate the LEDs for another two minutes.
LEDs
ACTIVE (1 through 8)
FAULT
4
Table 1
lists the different states and indications for the FRC-753 Channel
Figure 2. FRC-753 Front Panel
Table 1. FRC-753 Front Panel LEDs
State
Indicates
Solid green
Channel is off hook.
Fast flashing green
Channel is switched to the test pair.
Slow flashing green
Channel is ringing.
Off
Channel is on hook.
Red
Fault detected by the unit.
Off
No faults detected.
July 23, 1999
363-753-142-01, Revision 01
FRC-753 List 4B
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