Cisco Systems 80O SERIES manual Connecting an Isdn Line

Chapter 2 Installation

Installing Your Router

Connecting an ISDN Line

The procedure to connect an ISDN line depends on the router and in some cases your location. The following sections describe the following procedures:

•Connecting an ISDN Line to Cisco 801 and Cisco 803 Routers

•Connecting an ISDN Line to Cisco 802 and Cisco 804 Routers

Connecting an ISDN Line to Cisco 801 and Cisco 803 Routers

Outside of North America, you might need to provide an external NT1 device and the ISDN U cable that connects the NT1 to the ISDN wall jack. Contact your telephone service provider to supply the following information:

•Whether you must supply an external NT1 and the ISDN U cable.

•If necessary, the names of NT1 vendors.

In North America, you must provide an external NT1 and the ISDN U cable that connects the NT1 to the ISDN wall jack. Contact your telephone service provider for a list of NT1 vendors.

To connect an ISDN line to a Cisco 801 or Cisco 803 router without an external NT1, follow the steps in Figure 2-3 on page 2-11.

To connect an ISDN line to a Cisco 801 or Cisco 803 router with an external NT1, follow the steps in Figure 2-4 on page 2-11.

Warning Network hazardous voltages are present in the ISDN cable. If you detach the ISDN cable, detach the end away from the router first to avoid possible electric shock. Network hazardous voltages also are present on the system card in the area of the ISDN port (RJ-45 connector), regardless of when power is turned to standby.

Warning Do not work on the system or connect or disconnect cables during periods of lightning activity.

Warning To reduce the risk of fire, use only No. 26 AWG or larger telecommunications line cord.

Caution Always connect the orange cable to the orange ISDN S/T port on the router. Do not connect the cable to a yellow Ethernet port. This will damage your router.

Caution The Cisco 800 series routers do not support the Australian IUT requirement, which specifies that the routers must communicate for 1/2 hour after a power failure. If a power failure occurs, a Cisco 800 series router stops communicating with other devices.

Cisco 800 Series Routers Hardware Installation Guide

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