Cisco 870 Series User Manual

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Cisco 850 Series and Cisco 870 Series Access Routers Hardware Installation Guide
OL-5331-01
Chapter 4 Router Cabling Procedures
Connecting an Async Modem to the Console Port
Connecting an Async Modem to the Console Port
The Cisco 850 series and Cisco 870 series routers support the dial backup function, which allows a user
to connect an analog modem to the console port as a backup link to the WAN port in case the ADSL
service goes down.
Note To connect an analog modem to the console port, you will need an optional router modem cable. Contact
your router vendor to order this cable.
Although Figure 4-10 shows the async modem connection to the console port on the Cisco 857 router,
this connection applies to all Cisco 850 series and Cisco 870 series routers.
Figure 4-10 Connecting an Async Modem to the Console Port
1 Router console port 4 Wall jack connected by an RJ-11 telephone
cable to a port on an async modem
2 Router modem cable 5 Telephone connected by an RJ-11 telephone
cable to a port on an async modem (optional)
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Cisco 870 Series Specifications

General

Brand	Cisco
Model	870 Series
Category	Network Router
Language	English