Cisco 700 - Manual (Page 43)

Installing Your Router 3-7
Figure 3-3 Connecting to the ISDN S/T Port When an NT1 Is Required
Connecting the ISDN Line to the U Port
The U port connects to the telephone service provider network using the internal NT1.
Figure 3-4 shows the ISDN U port connection.
Caution Always connect the red cable to the red U port on the router. Do not
connect the cable to a yellow Ethernet port. This will damage your router.
CONFIG
1
+5V ---1.5A +/-5%
-30V--- 0.2A +/-25%
S 0 NT-1
ISDN U
ISDN S/T
10BASET CISCO 776
2
3
4
17258
Connect orange cable
to orange ISDN S/T port
Connect orange
cable to NT1
Connect ISDN U
cable to NT1
Connect cable to
ISDN wall jack
Connect NT1
power cord to
electrical outlet