Cisco Systems 1721 manual Equipment, When You Use It, 1-10

Chapter 1 Cisco 1721 Router Overview

Additional Required Equipment

Table 1-6 Additional Required Equipment

Equipment	When You Use It
Ethernet hub	A hub connects pieces of network equipment (including the
	Cisco 1721 router) to create a network. You can use a 10-, 100-, or
	10/100-Mbps hub with the Cisco 1721 router.
Ethernet switch	A switch connects pieces of network equipment (including the
	Cisco 1721 router) to create a network. You can use a 10-, 100-, or
	10/100-Mbps switch with the Cisco 1721 router.
Phillips screwdriver	Although the WICs use thumbscrews, you might need a Phillips
	screwdriver to loosen the WIC slot cover.
Cisco WIC	In order to make a WAN connection, the Cisco 1721 router must
	have a supported WIC installed. The router supports up to two
	cards. You can order the cards when you order the router, and they
	will be installed for you. Or, you can order the cards separately, after
	you receive the router, and then install them yourself.
Straight-through RJ-45-to-RJ-45	This cable connects the router to the Ethernet LAN and connects the
cable	WICs 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.
Serial cable	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, which comes with every card.
NT-1	Some ISDN service providers require a Network Termination 1
	(NT-1) device to connect an ISDN S/T port to the ISDN line.
Asynchronous modem	Connect a modem to the AUX port on the router when you want to
	configure the router from a remote location.

	Cisco 1721 Router Hardware Installation Guide
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