Installation guide

1-Port ISDN BRI Cards
Cisco WAN Interface Cards Hardware Installation Guide
3-14
Figure 3-13 ISDN BRI S/T WAN Interface Card LEDs (WIC36-1B-S/T)
BRI U WAN interface cards also have three LEDs, shown in Figure 3-14 for WIC-1B-U
and Figure 3-15 for WIC36-1B-U, and described in Table 3-2. The B1 and B2 LEDs
indicate call activity on the two ISDN BRI B channels. The NT1 LED indicates
synchronization status of the NT1.
Figure 3-14 ISDN BRI U WAN Interface Card LEDs (WIC-1B-U)
Table 3-1 BRI S/T WAN Interface Card LEDs
LED Meaning
B1 Active connection on B1 channel.
B2 Active connection on B2 channel.
OK ISDN port has established a connection
with the central office switch.
BRI
S/T
B1
B2
SEE MANUAL BEFORE INSTALLATION
LEDs
BRI S/T port
H7211
H9591
BRI
U
SEE MANUAL BEFORE INSTALLATION
B1 B2 NT1
LEDs LED