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Chapter 2. Installation and Operation
LED Descriptions
The T3SU 300 has LED status indicators for remote access, the
network port, and for each individual DTE port. These LEDs are
identified as follows:
Remote Active
This LED is solid when a remote configuration session is taking
place through a Telnet session or from the remote end T3SU 300. It
flashes when the unit is being accessed locally through the front
panel
Network LEDs
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, the 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.
40
port.
CONTROL
T3SU 300 User Manual
61202217L1-1B
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