ADTRAN 1200130L2 Manual do Utilizador descarregar pdf (Página 29)

61200.130L1-1 FSU User Manual 15

Chapter 3. Operation

LED Descriptions

The FSU has seven LED indicators: TD1, RD1, TD2, RD2, TDN,

RDN, and ALM/TST. These LEDs are identified as follows:

TD1: Transmit Data (DTE 1)

This LED is active when the FSU DTE 1 port is transmitting data.

RD1: Receive Data (DTE 1)

This LED is active when the FSU DTE 1 port is receiving data.

TD2: Transmit Data (DTE 2)

This LED is active when the FSU DTE 2 port is transmitting data.

RD2: Receive Data (DTE 2)

This LED is active when the FSU DTE 2 port is receiving data.

TDN: Transmit Data (Network)

This LED is active when the FSU Network port is transmitting

data.

RDN: Receive Data (Network)

This LED is active when the FSU Network port is receiving data.

ALM/TST: Alarm/Test

This LED is active when an alarm condition exists or when the

unit is in test mode. Alarm conditions include:

DDS Alarm Conditions

• Open loop on network

• No frame synchronization

Frame Relay Alarm Condition

• Network frame relay signaling state is down.

External DSU/CSU Alarm Condition

• DSR on an external DSU/CSU is false.

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ADTRAN 1200130L2 Manual do Utilizador Página 29