Kentrox DataSMART T3/E3 IDSU Installation Manual page 42

42 Chapter 5: Initial configuration
Table 2—LED indicators and their meanings
LED Indicator
POWER/FAIL Green
Red
Off
LOOP / FEL Yellow
Yellow, flashing
SEND Yellow
Yellow, flashing
ALARM Red
Green
Off
RCV Off
XMT
FEI
NEI
TxD Yellow
Off
RxD Yellow
Off
CA Yellow
Off
TA Yellow
Off
Condition
Power is on, self-test successful.
Power is on, self-test failed.
No power is being received.
Internal loopback is set.
Remote loopback is set and verified.
Remote loopback set code is
being transmitted.
Remote loopback may be set but
not verified.
Alarm exists at the network interface.
ACO switch has been activated, but
alarm still exists at the
network interface.
No alarm.
Not used; always off.
Data is being transmitted by DTE,
received by IDSU. (Indicates SD
activity for HSSI port, transmit data
activity for V.35 port.)
No transmit data.
Data is being received at DTE,
transmitted by IDSU. (Indicates RD
activity for HSSI port, receive data
activity for V.35 port.)
No receive data flow.
Indicates IDSU is ready to send and
receive data. (Indicates the state of
CA for HSSI port, and state of CTS
& DCD in V.35 mode.)
IDSU not ready.
Indicates DTE is ready to send and
receive data. (Indicates the state of
TA for HSSI port, and DTR for
V.35 port.)
DTE not ready.