... .l Longer than 20km, 155Mb/s, high speed optical interface can better support burst data long distance transmission ... SC,FC, ST optional, SC standard.Ø The optical line BER: <10-9Ø Signal Delay (optical interface): ≤1.6us/nodePower and Protection:Ø Power ... and reverse protection, industrial terminal interface.Ø Relay alarm output: optical fiber link failure and power error alarm output, maximum ...