Installation guide

Overview of Cisco WAN and Voice Interface Cards 1-13

Cisco 1600 Series Routers

The Cisco 1600 series of access routers connect small ofﬁces with Ethernet LANs to the

public Internet and to a company’s internal intranet or corporate LAN through several WAN

connections. The Cisco 1600 series routers include the following models: the Cisco 1601,

Cisco 1602, Cisco 1603, Cisco 1604, and Cisco 1605-R. (See Figure 1-8 through

Figure 1-12.)

All Cisco 1600 series models include one Ethernet port, one built-in WAN port, and one

WAN interface card expansion slot for additional connectivity and ﬂexibility.

Table 1-3 WAN Interface Card Options with Cisco IOS Releases for the

Cisco 1720 Router

WAN Interface Card Cisco IOS

Release

1-Port Serial (WIC-1T) 12.0(1)XA3

2-Port Serial (WIC-2T) 12.0(1)XA3

2-Port Asynchronous/Synchronous

Serial (WIC-2A/S)

12.0(1)XA3

1-Port ISDN BRI S/T (WIC-1B-S/T) 12.0(1)XA3

1-Port ISDN BRI U

(WIC-1B-U)

12.0(1)XA3

1-Port 56/64-kbps CSU/DSU

(WIC-1DSU-56K4)

12.0(1)XA3

1-Port T1/FT1 (WIC-1DSU-T1) 12.0(1)XA3