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Operation
3-5
3160-A2-GB21-80
March 1999
LEDs
There are twelve LEDs on the DSU/CSU front panel. The five LEDs on the right
(Figure 3-5) 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 to indicate the status
of the:
H System (Table 3-1)
H Network Interface (Table 3-2)
H DTE Drop/Insert (DSX-1) Interface (Table 3-3)
H Data Ports (Table 3-4)