What is the difference of monitor modules SMU01A, SMUO1B, SMU01C on Huawei ETP4890?

Because Huawei MA5600T, OSN 8800, OSN3500 is DC power, when you buy Huawei OLT or WDM devices, you need to choose a AC/DC converter to meet your AC plat; ETP4890-A2 is a very normal converter, there are three kinds of modules, what are the difference of these modules?

1, SMU01A can support WebUI remote manage function, SMU01B and SMU01C cannot support WebUI feature.

2,  SMU01B supports Huawei master/slave protocols and access network point-to-point protocols, which allows Huawei access network communications equipment to connect to the U2000.

What are the differences in the processing mechanism of the ring check function between earlier-version and later-version MA5600T?

We plan to buy Huawei OLT, What are the differences in the processing mechanism of the ring check function between earlier-version and later-version MA5600T?

• The processing mechanism of the ring check function of an earlier-version MA5600T has the following disadvantages:

1,After a loop is detected, the MA5600T deactivates the ONT. In this way, live-network configurations are modified.

After the ONT is deactivated, you need to manually activate the ONT (that is, re-configure services). This increases the workload.

• The processing mechanism of the ring check function of MA5600T V800R009 (or later versions) is optimized in terms of the following aspects:

1, After a loop is detected, the MA5600T makes the ONT go offline. In this way, live-network configurations are not modified but the ONT is stopped from transmitting services.

2, Huawei MA5600T automatically makes the offline ONT go online after a period of time elapses. Note that 3, the length of this period of time is configurable.

3, An easy-to-use query function is provided. With this function, you can query all ONTs that go offline because of loops.

• If you need to query all ONT deactivation records, run the display event history eventid command to query the information about events 0x2910000d and 0x29100026.