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one honk maybe more

benjojo posted 04 Nov 2024 13:39 +0000

Continuing my connoisseur-ness of weird stuff, I have been given a old OPB-SCE8K-MM to play with from a old cisco SCE8000 optical chassis.

The purpose is so that you can electrically (5 volts by the look of it) swap two (850nm in this case) optical paths, so if you were adding a interception/firewall in or something and wanted automatic redundancy or hands free control.

I need to figure out what the pin out of the connector is, so I can drive it without the rest of the SCE8000, but interesting how clean it is inside, also that the actual PCB inside the cisco branded unit doesnt seem to be made by cisco!

Pictures of a grey cisco box with a number of LC connectors in it, The unit has a CTRL port and a part number OPB-SCE8K-MM, the PCB photo shows Oplink 2x2 optical switch modules inside, with not much else inside it Pictures of a grey cisco box with a number of LC connectors in it, The unit has a CTRL port and a part number OPB-SCE8K-MM, the PCB photo shows Oplink 2x2 optical switch modules inside, with not much else inside it Pictures of a grey cisco box with a number of LC connectors in it, The unit has a CTRL port and a part number OPB-SCE8K-MM, the PCB photo shows Oplink 2x2 optical switch modules inside, with not much else inside it

benjojo replied 04 Nov 2024 17:27 +0000
in reply to: https://mastodon.social/users/purpleidea/statuses/113425674146290836

@purpleidea

How many packets are dropped during switchover?

datasheet suggests average switching time of 3ms, worst case 10ms

Does switching one way vs. the other have a different latency?

Unsure, i've yet to get this unit working

Do people still use something like this these days?

Yeah optical bypass protection still is used in some kit, though this being multimode only, is a little more limited use case (hence the reason I likely have it now)