
Connecting an ISDN Telephone to the Cisco 1604
Cisco 1600 Series Router Hardware Installation Guide
3-8
Note If the ISDN telephone model you are using does not require an external power
supply, connect the ISDN telephone RJ-45-to-RJ-45 cable directly to the router
ISDN PHONE port.
Follow these steps to connect an ISDN telephone to the router:
Step 1 Connect an RJ-45-to-RJ-45 cable (included) to the ISDN PHONE on the router.
Step 2 Connect the other end of the cable to the LINE port on the ISDN telephone
power supply, as shown in Figure 3-4.
Figure 3-4 Connecting an ISDN Telephone Power Supply to a Cisco 1604
Step 3
Connect the ISDN telephone RJ-45 cable to the PHONE port on the ISDN
telephone power supply, as shown in Figure 3-5.
OK
WIC
OK
LNK
OK
LNK
LINE
OTHER
PHONE
Power supply for
ISDN telephone
RJ-45-to-RJ-45 cables
ISDN U
port
Wall jack
OK LED
H7204
ISDN
PHONE
port
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