Is anyone aware of a company that offers a QSFP+/28 optic @ 40 or 100Gbps that can reach out to 60km or more, without the use of an amplifier, or additional intermediate WDM equipment. I understand that 40Gbase-ER4 (40K), and 100Gbase-ER4 optics are available per ratified standard. However, I'm curious if there is a company out there that are producing, or planning to produce a transceiver that can make it further than 40km. Thanks!
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