ADTRAN T3SU 300 User Manual page 41

DTE Port LEDs
Status
This LED indicates the following conditions:
LED
Off
Flashing green
On green
On red
On yellow
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.
61202217L1-1B
Condition
No option card is installed.
Interface is available but not configured.
Interface is available and configured.
DTE fault condition (for HSSI interface, no clock
from DTE).
For HSSI interface, terminal available (TA)
signal inactive.
T3SU 300 User Manual
Chapter 2. Installation and Operation
41