DSU/CSU WAN Interface Cards
56/64-kbps DSU/CSU WAN Interface Card
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OL-12845-01
56/64-kbps DSU/CSU WICs Overview
The 1-port 56/64-kbps DSU/CSU WIC (WIC-1DSU-56K4) includes an integral DSU/CSU and can be
configured to provide circuit-switched, dedicated, or leased-line service at 56 kbps. This WIC also
supports 64-kbps dedicated lines. (See Figure 56.)
Figure 56 WIC-1DSU-56K4 Front Panel
56/64-kbps DSU/CSU WIC LEDs
The 56/64-kbps DSU/CSU WIC LEDs, are shown in Figure 56. The functions of the LEDs are described
in Table 12.
Prerequisites for Connecting 56/64-kbps DSU/CSU WICs to a Network
Before connecting a WIC to the network, ensure that the WIC is installed in the router, the equipment is
properly grounded, and you have the proper cables for connecting the WIC to the network. This section
describes the preparation necessary before connecting a 56/64-kbps DSU/CSU WIC to the network.
Installing a Cisco Serial WAN Interface Card
Install the Cisco serial wan interface card according to the instructions in Installing Cisco Interface
Cards in Cisco Access Routers.
Grounding
Ensure that the equipment you are working with is properly grounded. For instructions on grounding
your serial WIC, refer to Installing Cisco Interface Cards in Cisco Access Routers.
LEDs LED
56- or 64-kbps port
41224
SEE MANUAL BEFORE INSTALLATION
DSU
56K
CD
AL
LP
RD
TD
Table 12 56/64-kbps DSU/CSU WIC LEDs
LED Description
TD Data is being transmitted to the DTE interface.
RD Data is being received from the DTE interface.
LP Internal DSU/CSU is in loopback mode.
AL One of these alarm conditions is present: no receive signal, loss of frame signal from
the remote station, or out of service signal from the remote station. This LED is off
during normal operation.
CD Internal DSU/CSU in the WIC is communicating with another DSU/CSU.
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