Operating Procedure 3-1
Chapter 3Operation
The ARC-101 has several LED indicators, providing information on the
ARC-101's general status, as well as right and left module status
(see Figure 3-1). The indicators are ON, OFF, or BLINK, depending on the
state of ARC-101. Table 3-1 lists the functions of the front panel indicators.
out out out
Figure 3-1 ARC-101 Front Panel
Table 3-1ARC-101 LED Indicators
Name Description
PWR (green) ON When ARC 101 is powered.
FLT (red) BLINKS Error detected during self-test
− If the error is in one of the modules, the module's two LEDs blink;
− In case of a system error, the two module's LEDs blink.
ON During self-test
ATM (green) ON During active ATM connections on the module's port:
That is when no HEC error was detected during the last second and,
at least one cell was received and transmitted in the last second.
SYNC (green) ON When the module's port is synchronized (no alarm)
OFF During local alarm (a fault is detected on the receive side of ARC-101).
BLINKS During remote alarm the remote unit signals that a fault has been
detected.