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5.0 OPERATION
Once the NetLink-E1™ is installed and configured properly it is ready to
place into operation. This section describes the function of the LED indi-
cators, and the use of the loopback and pattern test modes.
5.1 LED DESCRIPTIONS
The NetLink-E1™ is equipped with nine LED indicators that monitor the
status of communication. Figure 13 shows the location of the LEDs on
the NetLink-E1™ Series front panel.
Figure 13.
Model 2707RC front panel, showing LED indicators.
TXD
When the unit sends a one, the TXD LED is green. When it
sends a zero, the TXD LED is yellow. Moreover, the TXD
LED is active only in active DS0 channels. In inactive
channels, the TXD LED is off.
RXD
When the unit receives a one, the RXD LED is green.
When it receives a zero, the RXD LED is yellow. Moreover,
the RXD LED is active only in active DS0 channels. In
inactive channels, the RXD LED is off.
Link
The Link LED is green when it detects a live E1 network
connection by the 2707RC’s E1 port. The Link LED
remains off if there is no connection to the E1 network.
TM
The Test Mode LED will briefly blink yellow to indicate that
the Model 2707RC is in local loopback mode.
Link
TM
TXD
RXD
Model 2707RC
LLB
