Peter, A Cisco-branded 10Gbase-ZR X2 actually has a power budget of (at least) 24 dBm @ 1550 nm[1]. Get the fiber cleaned, re-spliced as you suggest, and (re-)tested (to also check for dispersion). It's likely to work just fine.
I have a couple of customers running 'grey' links at significantly more than 24 dB, and while that's not something I'd normally suggest or consider best practice, there really is a pretty good chance that it'll work just fine. [1] http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6574/product_dat a_sheet0900aecd801f92aa.html -A PS: Be careful if testing them in a lab. You *will* toast them if not using attenuators. -----Original Message----- From: cisco-nsp-boun...@puck.nether.net [mailto:cisco-nsp-boun...@puck.nether.net] On Behalf Of Peter Rathlev Sent: 16. maj 2012 11:19 To: cisco-nsp Subject: [c-nsp] Long range 10G ethernet? (On 6500/Sup720 and with LAN cards) We're currently using a gigabit link with a total loss of 24.1dB (at 1510 nm) from end to end. We're using some third party "120 Km" transceivers, and this is working well. Now we're thinking about making it a 10G link instead. Finding 10G transceivers capable of supporting at least ~24-25dB seems tricky though. Googling a bit reveals something like the Optospan SPP-81D-K080T31, rated for 25dB at 1310nm. Of course we're primarily using X2 transceivers, and that one is an SFP+. [snip] _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/