BIG NEWS! The Adtran Support Community is moving! In the next few weeks it will be housed in a new location. Be sure to visit our NEW Adtran Community before the end of July to check it out and verify that you can access all the resources and features that you need. If you discover any issues with your account or access, or just want to let us know about your experience, be sure to use our Feedback Form to let us know!
 | Article ID: 1914 |
| Q&A | |
T3SU 300 LEDs
Q:
A:
- IN SERVICE: This LED is active when a valid signal is being received on the DS3 interface.
- IN TEST: This LED is active when the network interface has been put in loopback by the service provider.
- ALARM: This LED is active when the DS3 receive signal contains framing errors, a yellow alarm is received from the far end unit, or other alarm messages are received from the network.
- LOS: This LED is active when no receive signal from the network is detected on the Rx (in) circuit.
DTE Port LEDs:
- STATUS: This LED indicates the following conditions:
-- Off: No option card is installed. -- Flashing green: Interface is available but not configured. -- Solid green: Interface is available and configured. -- Solid red: DTE fault condition (for HSSI interface, no clock from DTE). -- Solid yellow: For HSSI interface, terminal available (TA) signal inactive.
- 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.
