Cisco 1720 Hardware Installation Manual page 31

Chapter 1 Cisco 1700 Router Overview
Equipment
Cisco WAN interface card
Straight-through
RJ-45-to-RJ-45 cable
Serial cable
NT1
Asynchronous modem
78-5405-03
When You Use It
In order to make a WAN connection, the Cisco 1700 router must
have a supported WAN interface card installed. The router
supports up to two cards. You can order the cards when ordering
the router, and they will be installed for you. You can order the
cards separately, after receiving the router, and install them
yourself.
This cable connects the router to the Ethernet LAN and the
WAN interface cards to various WAN services, including ISDN,
T1/FT1, and 56-kbps services. You will need one cable for each
connection that requires this cable type.
This cable connects a serial card to serial services. You must
order this cable from Cisco. For detailed information about
serial cable types, refer to the Cisco WAN Interface Cards
Hardware Installation Guide that comes with every card.
Some ISDN service providers require a Network Termination 1
device to connect an ISDN S/T port to the ISDN line.
Connect a modem to the AUX port on the router when you want
to configure the router from a remote location.
Cisco 1700 Router Hardware Installation Guide
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