Cisco 1605-R How To Use Manual page 59

For more information on BRI network modules, see the publication Cisco Network
Modules Hardware Installation Guide.
Warning Network hazardous voltages are present in the BRI cable. If you detach 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. (To see translated versions of
this warning, see the Regulatory Compliance and Safety Information document that
accompanied the router.)
The ISDN connection is regarded as a source of voltage that should be
Warning
inaccessible to user contact. Do not attempt to tamper with or open any public telephone
operated (PTO)-provided equipment or connection hardware. Any hardwired connection
(other than by a nonremovable, connect-one-time-only plug) must be made only by PTO
staff or suitably trained engineers. (To see translated versions of this warning, see the
Regulatory Compliance and Safety Information document that accompanied the router.)
Use a BRI cable (not included) to connect the BRI WAN interface card directly to an ISDN.
See the online document Cisco Modular Access Router Cable Specifications for pinouts.
This document is located on both the Documentation CD-ROM that accompanied your
router package, and Cisco Connection Online.
Take the following steps to connect an ISDN BRI S/T WAN interface card to an NT1
device:
Confirm that the router is still turned OFF.
Step 1
Connect one end of a straight-through RJ-45-to-RJ-45 cable to the card's RJ-45
Step 2
connector.
Step 3 Connect the other end of the cable to the NT1, as shown in Figure 3-10.
Connect the NT1 to the ISDN wall jack according to the documentation that
Step 4
came with the NT1.
Turn ON power to the router.
Step 5
Connecting WAN and Voice Interface Cards to a Network 3-11
Connecting ISDN BRI Cards