OAM test supports IEEE 802.3ah, IEEE 802.1ag, ITU-T Y.1731, and ITU-T G.8113.1 OAM link and services protocol. It includes partner link detection, remote loopback, MIB retrieval, and link event notification. It also can check network connection, connection ring back; generate link trace messages, and analyse service level of OAM test application. ITU-T Y.1731 OAM message can practice frame loss performance verification. ITU-T G.8113.1 OAM message can verify the PTN network, and practice and the frame loss performance verification.