Cisco 800 Series Quick Start Manual page 7

Option B—Connecting Cisco 802 and Cisco 804 Routers
Figure 4 Connecting an 802 or 804 Router to an ISDN Line
HU B
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Cisco 804 router
Step 1 Connect the red cable to the red ISDN U port.
Connect the other end of the cable to the ISDN wall jack. If your wall jack has an RJ-11 connector, attach the
Step 2
RJ-45-to-RJ-11 adapter cable to the red cable, and then connect the RJ-11 connector to the ISDN wall jack.
IS DN U
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RJ-45-to-RJ-11
adapter cable
ISDN wall jack
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