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Connecting the ISDN Line
To connect an ISDN line to the U port on a router, complete the following steps.
Step 1
Step 2
Figure 3-4
C O N FI G
3-8
Cisco 700 Series Router Installation Guide
Connect the red ISDN U cable to the red port labeled ISDN U on the rear panel
of your router.
Connect the other end of the red ISDN U cable to the ISDN wall socket. (See
Figure 3-4.)
Connecting to the ISDN U Port
4
10 BA SE T
3
CI SC O 77
6
2
1
IS D N S /T
IS D N U
S
0
N T -1
Connect red cable
to red ISDN U port
Connect red
cable to ISDN
wall jack
+5 V --- 1.5
A +/- 5%
-30 V- -- 0.2
A +/- 25 %
If your wall jack has an RJ-11 connector,
attach RJ-45-to-RJ-11 adapter cable
to red cable, and then connect RJ-11
connector to ISDN wall jack
RJ-45-to-RJ-11
adapter cable
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Troubleshooting
