Cisco Systems 800 Series quick start Connect an Isdn Line

7Connect an ISDN Line

Refer to the section corresponding to your router model and follow the steps to connect the Cisco 800 series router to an ISDN line.

•Option A—Connecting Cisco 801 and Cisco 803 Routers

•Option B—Connecting Cisco 802 and Cisco 804 Routers

Caution Always connect the orange cable to the orange ISDN S/T port and the red cable to the red ISDN U port on the router. Do not connect either cable to the yellow Ethernet port. Accidently connecting these cables to the wrong port can damage your router.

Option A—Connecting Cisco 801 and Cisco 803 Routers

This section describes how to connect Cisco 801 and Cisco 803 routers outside of North America. For information on connecting these routers in North America, see the Cisco 800 Series Routers Hardware Installation Guide.

Figure 3 Connecting an 801 or 803 Router to an ISDN Line

HUB

NO HUB

ETHERNET 10 BASE T

0

1

2

3

Cisco 803

CONSOLE

ISDN S/T

PHONE

1 2

Cisco 803 router

ISDN wall jack

Step 1 Connect the orange cable to the orange ISDN S/T port.

Step 2 Connect the other end of the cable to the ISDN wall jack.

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