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Chapter 3 Installation
Installing Your Router
3-6
Cisco 811 and Cisco 813 Routers Hardware Installation Guide
78-10188-03
Connecting an ISDN Line
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-11
connector), regardless of when power is turned to standby.
Warning
Do not work on the system or connect or disconnect cables during
periods of lightening activity.
Warning
To reduce the risk of fire, use only No. 26 AWG or larger
telecommunications line cord.
Caution Always connect the red cable to the red ISDN U port on the router.
Do not connect the cable to a yellow Ethernet port. This will damage
your router.
Caution If a power failure occurs, the router stops communicating with other
devices.