Cisco X2-10GB-ZR: Supports link lengths of up to about 80 km on SMF. This interface is not part of the 10 Gigabit Ethernet standard but is built according to Cisco optical specifications.
I have a need to connect my 4507 chassis with the X2-10GB-ZR module to a Nortel switch at another site. Can anyone tell me if the Cisco ZR module is standards compliant, Nortel claim theirs to be, but don't want to waste a lot of money on a module that won't communicate ?
Seeing that most of these modules are manufactured by a couple of major optics module vendors, I would assume they will interoperate. I looked at Nortel's ZR XFP specs and they look very similiar in optical parameters. From what I can gather, the IEEE has not ratified a ZR spec: 80km, 1550nm, SMF, so vendors developed one based on the SONET optics.
To put your mind at ease, you may want to contact Cisco (or a partner) to see if they can provide you a loaner, or try before you buy option. This way you can test the solution for interoperability. I know in the past they had these types of programs to offer their customers.
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