On the U2000 network management, the oLT PON port LED is not green, indicating that the PON port is faulty.
The number of users under the OLT can also determine whether the VLA is single-layer or dual-layer VL
The establishment, maintenance and dismantling of the word path between the SIP user and the server are done through the interaction of the --series of messages, so that every information contained in the SIP text has a --nature, There is no phenomenon in which a single information value appears multiple times.
(Multi-select) Query ppPOE simu-lation results on the MDU side as follows
From the query results, it can be judged ()