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Cisco 800 Series Routers Hardware Installation Guide
78-5373-04
Chapter 2 Installation
Installing Your Router
Figure 2-3 Connecting an ISDN Line to Cisco 801 and Cisco 803 Routers (without External NT1)
Figure 2-4 Connecting ISDN to Cisco 801 and Cisco 803 Routers (with External NT1)
1. Connect orange cable
to orange ISDN S/T port.
ISDN wall jack
Cisco 803 router
2. Connect other end of
cable to ISDN wall jack.
11677
ISD
N
S
/T
C
O
N
S
O
L
E
1
2
ETHE
RN
ET 10 BA
SE T
HUB
N
O
H
U
B
Cisco 803
PHON
E
0
1
2
3
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1. Connect orange cable
to orange ISDN S/T port.
Cisco 803 router
2. Connect other end
of cable to NT1.
3. Connect ISDN U
cable to NT1.
NT1
ISDN wall jack
4. Connect other end of
cable to ISDN wall jack.
5. Connect NT1
power cord to
electrical outlet.
IS
D
N
S
/T
C
O
N
S
O
L
E
1
2
ETHERNET 10 BASE T
HUB
N
O
H
U
B
Cisco 803
PH
ON
E
1
2
3
0