Cisco 1-Port 4-Wire 56-/64-kbps CSU/DSU WAN Interface Card HWIC-1DSU-56K4=

The Cisco® 1-Port 4-Wire 56-/64-kbps CSU/DSU WAN Interface Card (HWIC-1DSU-56K4) performs the channel service unit/data service unit (CSU/DSU) functions for both digital data service (DDS) (dedicated) and 4-wire switched 56-kbps (56K) data networks. In addition, it provides an all-rate synchronous interface to any dedicated DDS point-to-point or multipoint network compatible with AT&T Publication 62310. The new card also supports 4-wire switched 56K data services such as AT&T's Accunet 56 or Sprint's VPN-56 plus many switched data services offered by local exchange carriers. Figure 1 shows the Cisco 1-Port 4-Wire 56-/64-kbps CSU/DSU WAN Interface Card (WIC).

Product Type	WAN Interface Card (WIC)
Brand Name	Cisco
Manufacturer	Cisco Systems, Inc
Product Name	1-Port 4-Wire 56-/64-kbps CSU/DSU WAN Interface Card
Manufacturer Part Number	HWIC-1DSU-56K4=
Manufacturer Website Address	http://www.cisco.com
Compatibility	Cisco Routers: 1905 1921 1941 2901 2911 2921 2951
Application/Usage	Wide Area Network
Interfaces/Ports Details	1 x RJ-48S Synchronous Serial Network WAN