Which of the following are basic flow for single point commissioning of PTN 6000 seri

A./ n1.Power on the device and check whether each part of the device is running normally/ n2. Check whether each Ethernet port is normal by loopback network cable connectors; check whether E1 port is normal by loopback 2M coaxial cable/ n3. Check whether versions are engineering versions/ n4. Check whether output optical power meets optical module index

B./ n1.Power on the device and check whether each part of the device is running normally/ n2.Check whether versions are engineering versions / n3.Check whether each Ethernet port is normal by loopback network cable connectors; check whether E1 port is normal by loopback 2M coaxial cable/ n4.Check whether output optical power meets

C./ n1.Power on the device and check whether each part of the device is running normally/ n2.Check whether versions are engineering versions / n3.Check whether output optical power meets optical module index/ n4.Check whether each Ethernet port is normal by loopback network cable connectors; check whether E1 port is normal by loopback 2M coaxial cable

D./ n1.Power on the device and check whether each part of the device is running normally/ n2.Check whether output optical power meets optical module index / n3.Check whether versions are engineering versions / n4.Check whether each Ethernet port is normal by loopback network cable connectors; check whether E1 port is normal by loopback 2M coaxial cable