Installation guide

1-10

HiSpeed WAN Comm. Installation and Service Guide

The figure 11 shows a simple example of transferred packets during a call between two

DTEs using a switched virtual circuit (SVC):

1. A makes a call, which B receives.

2. B accepts the call; A receives a call saying the call has been connected.

3. A sends some data, but does not ask for acknowledgment.

4. A sends some more data, which B acknowledges.

5. A clears the call; B receives indication of this and confirms that is has received

the indication.

6. The network confirms to A that the call has been cleared.

Network

DTE A

DTE B

DCE

Call-Request packet

Call-Connected packet Call-Accepted packet

Data packet

Acknowledgement

Incoming-Call packet

Clear-Indication packet

Acknowledgement

Clear-Confirmation packet

Clear-Request packet

Clear-Confirmation packet

DCE

Figure 11. Sequence of packets in an example call over a switched virtual circuit