link test
2.As part of this phase, LCP also allows for an optional link-quality determination test.
3.With in depth research on all the characters of data link, a solution of this test system is presented based on GPIB. And with the application of object oriented (OO) design method, the software of this test system is developed with Visual C++, which is one of the most efficiency developing environment nowadays, and the test result can meet the request of test totally.
6.It introduces the test methods of physical layer, data link layer and network layer of network interface by ISDN subscriber, recommends that the emphasis shall be given to the compatible test during practical acceptance test of the project, and emphasis shall also be given to the unification and effectiveness of equipment during the test of equipment being lined up with the network.
7.The LCP sits on top of the physical layer and is used to establish, configure, and test the data-link connection.

