
115370-A Rev. A 2-1
Chapter 2
Checking the Dual Sync/ISDN BRI
Net Module LEDs
Figure 2-1 shows the Dual Sync/ISDN BRI net module and Table 2-1 describes
the LEDs.
Figure 2-1. Dual Sync/ISDN BRI Net Module LEDs
Table 2-1. Functions of the Dual Sync/ISDN BRI Net Module LEDs
LED Function
DCD1 Indicates that data carrier detect is present on the COM1 port.
DCD2 Indicates that data carrier detect is present on the COM2 port.
F (FAIL) Lights during power-up, and might flash during diagnostic testing. The FAIL
LED turns off once the diagnostics complete successfully and the router
boots.
The LED remains lit if the net module or any connector on the net module
fails diagnostics. In this case, the DIAG LED on the ASN front panel will
also be on.
ISDN BRI Lights when the interface is active, and turns off when the interface is
inactive.
ISDN - BRI
DCD
DCD
2
1
SYNC/ISDN
34005
F
ASN0022A
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