such thing as an OC512?

[TechBoyJK]

"former" prospect claims they found a datacenter that has an OC512. wtf?

 

[cmetz]

OC192c is the fastest I've seen in the wild.

 

[ScottMac]

Could have meant OC12 (with a typo). OC12 is 622Mbps. OC48 is ~2.4G, OC192 is a bit under 10G.

FWIW

Scott

 

[Zucarita9000]

Actually, there is OC-768 (40 Gbps) and OC-3072 (160 Gbps). Anything higher than that would have to be DWDM (10 Tbps).

Theoretically, you could transmit 500GB in 25 seconds over OC-3072 and 5TB in 3 seconds over DWDM... :Q

 

[Barnaby W. Füi]

Yeah, I've heard of OC768, never OC512, but no idea if there is such a thing.

 

[ScottMac]

Actually, with DWDM, that woul be an aggregate bandwidth. Each color / wavelength channel of light ( a "lamda") carries some chunk of bandwidth (like several-to-many channels of Gig E or OC2/12/48, for example) through the same pair of fiber concurrently. It's not a time division like with OC / SONET.

A popular use these days is to use a WDM blade in core switches situated around a large campus where each lamda carries a Gig E trunk for a given VLAN. Instead of one pair-per-trunk, you can have several trunks on one pair, each trunk carried on one lamda.

Even though a WDM / DWDM shelf or blade is extremely expensive (US$100K / shelf), many times it is cheaper than planting more fiber.

FWIW

Scott