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Chapter 2. Installation and Operation
2-10 T3SU 300 User Manual 61200217L1-1
In Test
This LED is active when the DTE interface is in a loopback
condition or is performing a BERT test.
TD
This LED is active when the T3SU 300 DTE port is transmitting
data.
RD
This LED is active when the T3SU 300 DTE port is receiving data.
LED Condition
Off No option card is installed.
Flashing green Interface is available but not configured.
On green Interface is available and configured.
On red DTE fault condition (for HSSI interface, no clock
from DTE).
On yellow For HSSI interface, terminal available (TA) sig-
nal inactive.