Above 40km I like coherent systems with FEC. You can feed the juniper into a pair of SolidOptics 1U appliances 

Ms. Lady Benjamin PD Cannon of Glencoe, ASCE
6x7 Networks & 6x7 Telecom, LLC 
CEO 
lb@6by7.net
"The only fully end-to-end encrypted global telecommunications company in the world.”

FCC License KJ6FJJ

Sent from my iPhone via RFC1149.

On Sep 24, 2021, at 2:35 PM, Edwin Mallette <edwin.mallette@gmail.com> wrote:

I just bite the bullet and use 3rd party optics.  It’s easier and once  you make the switch, lower cost. 

Ed

Sent from my iPhone

On Sep 25, 2021, at 12:29 AM, Joe Freeman <joe@netbyjoe.com> wrote:


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 <rcarpen@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