Installation guide

Connecting WAN and Voice Interface Cards to a Network 3-5

Connecting the Card to the Network

After you install the serial WAN interface card, use the appropriate serial cable to connect

the interface card’s DB-60 serial port to one of the following types of equipment (see

Figure 3-4):

• An asynchronous modem, if connecting to an analog telephone line

• A synchronous modem, data service unit/channel service unit (DSU/CSU), or other

DCE, if connecting to a digital WAN line

Note Cisco 3600 and Cisco 2600 series routers support only synchronous modems; the

Cisco 1720 router and Cisco 1600 series routers support both synchronous and

asynchronous modems.

Take the following steps to connect the serial card to the WAN:

Step 1 Conﬁrm that the router is still turned OFF.

Step 2 Connect one end of the appropriate serial cable to the card’s DB-60 port.

Step 3 Connect the other end of the cable to the appropriate type of equipment, as

shown in Figure 3-4.