...and I've just re-read that you were looking for what you could use. There's something like this: https://www.packetlight.com/products/100g-200g-dwdm-transport/200g-single-wavelength-muxponder
I've no personal experience of it, and there may be other similar products on the market, but that looks like it could have a 100GBASE-LR4 uplink to your router, and a CFP2-ACO transceiver facing the provider. Rob On Wed, 24 Jan 2024 at 17:50, Rob Evans <[email protected]> wrote: > > It sounds as though your provider is suggesting a CFP2-DCO, such as > one of these: > https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/datasheet-c78-743732.html > > They're giving you a specification that includes the entire C band > (4.8THz), but stating that your wavelength must fit within 50GHz, > which is a traditional ITU-T channel width for DWDM systems, so they > should probably also specify which channel you're going to use. > > CFP2-DCOs tend to work because they've got the space and power for the > DSPs, and it has been difficult to cram that into QSFP28s (coherent > optics requires a lot of signal processing). As you've already noted, > there are products in the pipeline, but I'm not aware of any that are > widely supported yet. Cisco do seem to suggest there is a QSFP-DD > using QPSK for 100G, but I've not looked too closely at it (and note > that QSFP-DD is different to QSFP28, having about three times the > electrical power available): > https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/datasheet-c78-744377.html > > Cheers, > Rob > > On Tue, 23 Jan 2024 at 19:54, Shawn L via cisco-nsp > <[email protected]> wrote: > > > > Thanks - we don't really understand the intricacies either. This is our > > first adventure in this area. > > > > The distances are quite large (800+ Km). It's a dark wave service, though > > we don't have to worry about anything in the middle, just the 2 end points. > > > > I'm told Adva / Adtran will be releasing a ZR+ 0dBm QSFP28 that would (or > > should) work in Q2 2024, but I'm looking for other options. I did check > > out FS.com, but they're telling me the only option they have available uses > > a 200Gig CFP2 and 2 100gig QSFP28s. > > > > Any idea where else we might look? We'd be happy to engage someone to help > > us design a solution, we're just not sure where to turn. > > > > Shawn > > > > On Fri, Jan 19, 2024 at 1:25 PM Hunter Fuller <[email protected]> wrote: > > > > > I know when we are talking about DWDM my usual expectation these days > > > is to use a "0km optic" (aka one that is meant to launch just far > > > enough to make it into an amp)... so one of those (from anyone, e.g. > > > fs.com, whatever) followed by an amp might be doable? I would advise > > > you to contract someone to work that out though (I myself don't even > > > fully understand the intricacies). > > > > > > the point of the 0km optic is that it fits in QSFP+ generally. It's a > > > lot to ask, to get a precisely tuned DWDM wave coming out of a lil > > > QSFP+ at ZR levels. > > > > > > The other option of course being to send it LR and then use a > > > transponder closer to the DWDM gear, as Nick suggested. > > > > > > -- > > > Hunter Fuller (they) > > > Router Jockey > > > VBH M-1C > > > +1 256 824 5331 > > > > > > Office of Information Technology > > > The University of Alabama in Huntsville > > > Network Engineering > > > > > > On Fri, Jan 19, 2024 at 9:07 AM Nick Hilliard via cisco-nsp > > > <[email protected]> wrote: > > > > > > > > Shawn L via cisco-nsp wrote on 19/01/2024 14:58: > > > > > The pluggable optic must be DWDM 1530 to 1563 nm with QPSK modulation > > > that > > > > > fits 50Ghz (~31 to 35Gbaud) and a launch power of ZR+ 0dBm. The > > > customer > > > > > channel should have Rx: Max <-10 dBm/Ch and Tx: Min: >–5 dBm/Ch to > > > Max: <+ > > > > > 6.5dBm/Ch in order to meet the GOSNR margin of 2.5dBm or more. > > > > > > > > right, so DWDM alien wave requirement then. That's very non-portable and > > > > kit specific. > > > > > > > > Depending on the application, you might be better off ditching the > > > > requirements that they're imposing and simply using 100G transponders > > > > (i.e. 100G as a service). Or something like the smartoptics open line > > > > system with PAM4 QSFP28 transceivers. > > > > > > > > It really depends on what's between you and the other end. D/F has > > > > simple options open for single 100G. If you're connecting into something > > > > more complicated, it can get messy and expensive. > > > > > > > > Nick > > > > _______________________________________________ > > > > cisco-nsp mailing list [email protected] > > > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > > > > _______________________________________________ > > cisco-nsp mailing list [email protected] > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
