In our WAN we will create a remote node, which will be the community center. We will use the ISDN BRI service to connect the remote node to the network. Using an ISDN link is an inexpensive way of adding network access to the community center because will not need full-time active link going to and from it. The implementation of ISDN will start from the Central Office, linking to an ISP, and then linking to the small remote site. ISDN uses 2 B channels for separate voice and/or data applications and 1 D channel for control and signaling information. The BRI will provide a total bandwidth of 144kbps [(2 * 8bit B channel + 2bit D channel) * 8000 frames per sec] = 144kbps. For the implementation of ISDN we will need an ISDN router, NT1 device, and a terminal. The benefits for using ISDN are that it offers a faster call setup time than a modem, it avoids full time data service costs and it uses DDR, which automatically establishes and releases circuit switched calls as needed by networking traffic. Router Configuration: Router(config)#
encap ppp
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