To do successful work on their service learning project, students need to learn skills and concepts, the learning goals of your class. You need to decide how to teach these skills and concepts. Traditional methods can work well. The community partner needs to provide a one-page problem statement on letterhead.
ISDN physical layer (Layer 1) frame formats differ depending on whether the frame is outbound (from terminal to network) or inbound (from network to terminal). Both physical layer interfaces are shown in Figure: ISDN Physical Layer Frame Formats Differ Depending on Their Direction.
Basic ISDN (BRI) is designed to meet the needs of most individual users and small networks. It is fairly inexpensive and can use existing phone wiring. It divides the telephone line into three channels: two 64Kbps bearer channels (B channels) and one 16Kbps D channel for setting up and managing calls.