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3. Using the Front Panel
3160-A2-GB24-10 March 2001
3-5
LEDs
There are twelve LEDs on the DSU/CSU front panel. The five LEDs on the right
(Figure 3-5, DSU/CSU LEDs) are shared between the DTE Drop/Insert (DSX-1)
interface and the data ports. Refer to
Selecting the DTE Drop/Insert or Data Port
for LED Display
on page 3-12 to choose which port’s status the LEDs display.
NOTE:
The DTE Drop/Insert (DSX-1) interface is only available on 2-port and 4-port
DSU/CSUs.
Figure 3-5. DSU/CSU LEDs
A green LED indicates normal operation. A yellow LED indicates a warning (for the
DTE Drop/Insert interface) or activity (for the data ports). Conditions are sampled
every tenth of a second.
The twelve front panel LEDs are grouped into four sections:
System LEDs (Table 3- 1)
Network Interface LEDs (Table 3- 2)
DTE Drop/Insert (DSX-1) Interface LEDs (Table 3-3 )
Data Port LEDs (Table 3-4)
493-14301
OK
TEST SIG OOF ALRM
NETWORK TXD
EER SIG ALRM PDVOOF BPV
FAIL
DTR RXD CTS RTS