Open Line Systems can get you to 80K with a 100G DWDM Optic (PAM4) - I've used a lot of SmartOptics DCP-M40 shelves for this purpose. They also have transponders that allow you to go from a QSFP28 to CFP to do coherent 100G out to 120Km using the DCP-M40, without a need for regen or extra amps in line.
The DCP-M40 is a 1RU box. It looks like a deep 40ch DWDM filter but includes a VAO, EDFA amp, and a WSS I think. On Fri, Sep 24, 2021 at 4:40 PM Randy Carpenter <rcar...@network1.net> wrote: > > How is everyone accomplishing 100GbE at farther than 40km distances? > > Juniper is saying it can't be done with anything they offer, except for a > single CFP-based line card that is EOL. > > There are QSFP "ZR" modules from third parties, but I am hesitant to try > those without there being an equivalent official part. > > > The application is an ISP upgrading from Nx10G, where one of their fiber > paths is ~35km and the other is ~60km. > > > > thanks, > -Randy >