Cisco 1603R User Manual page 32

Connecting the Router to the WAN
Figure 2-8
Warning
the BRI cable, detach the end away from the router first to avoid possible electric
shock. Network hazardous voltages also are present on the system card in the area
of the BRI port (RJ-45 connector), regardless of when power is turned off.
Step 3
2-14 Cisco 1600 Series Router Hardware Installation Guide
ISDN Wall Jack Connection—Cisco 1603
Wall jack
Straight-through
BRI cable
Network hazardous voltages are present in the BRI cable. If you detach
Check the following LEDs:
•
The OK LED on the rear panel (next to ISDN S/T port) lights when the router
has synchronized with the central office switch.
•
The external NT1 might have an LED indicating synchronization with the
central office switch or other NT1 status. Check the NT1 documentation.