OTU loopback modes include the terminal outer, facility outer, terminal inner and facility inner loopback. Terminal outer: A loopback that the client side incoming received signal is connected to the client side transmitter, and does not pass the wrapper/dewrapper IC chip. Facility outer: A loopback that the WDM side incoming received signal is connected to the WDM side transmitter, and does not pass the wrapper/dewrapper IC chip. The OTU supports the outloop function.
Context
NOTICE: As loopback interrupts the services at the port, it is only used for the fault location and must be released after the fault is removed.
Procedure
- In the NE Explorer, select a board and choose from the Function Tree.
- Select an entry. Double-click a parameter and select the loopback mode.
NOTE: The loopback modes are different for different interfaces. Generally,- For WDM side interfaces IN/OUT, the loopback modes are the Terminal Inner and Facility Outer loopback.
- For client side interfaces RX/TX, the loopback modes are the Terminal Outer and Facility Inner loopback.
- Click Apply. A prompt appears telling you that the operation was successful.
- Click Close.
- Optional: Click Query to query the loopback record data.