The frame structure of ODU4 is four times that of ODU1
Which of the following are device-level protection schemes for SDH products? (Multiple choice).
When the SNCP ring consisting of four Optis OSN 2500 devices has a rate of 25 Gbt/s, the network's service answer stars can carry up to ()2Mt/s Signal.
The 1510nm optical monitoring channel can be effectively amplified after passing through EDFA.
When an OTU board works with an OLP board, the optical power difference cannot be used as a trigger condition for intra-board 1+1 protection switching.