CFP2 stands for C Form-factor Pluggable 2. A pluggable form factor frequently used for coherent metro and long-haul optical transmission. The term is most useful when a project connects that definition to a concrete use case such as Coherent DCI, metro and long-haul networks.
The reference framework matters when specifying CFP2 for Coherent DCI, metro and long-haul networks. The mechanical, electrical, thermal, and management requirements normally come from the relevant MSA and host-platform specification. A product name or quotation that mentions CFP2 without that context is not yet a complete requirement.
CFP2 should not be treated as another name for QSFP28. CFP2 is defined here as a pluggable form factor frequently used for coherent metro and long-haul optical transmission. By comparison, QSFP28 means a four-lane hot-pluggable form factor commonly used for 100G Ethernet, typically with four 25G electrical lanes. The two concepts may appear in the same design, but they answer different engineering or purchasing questions.
When selecting or documenting CFP2, verify cage type, electrical lane mapping, power class, cooling, firmware, and backward compatibility. A common mistake is to assume that support for QSFP56 automatically confirms support for CFP2; the exact data sheet, host configuration, and test conditions must show that relationship.
Frequently Asked Questions
How is CFP2 different from QSFP28?
CFP2 refers to a pluggable form factor frequently used for coherent metro and long-haul optical transmission. QSFP28 instead refers to a four-lane hot-pluggable form factor commonly used for 100G Ethernet, typically with four 25G electrical lanes. They can be related in one project, but one does not prove compliance with the other.
Where is CFP2 normally used?
Typical use includes Coherent DCI, metro and long-haul networks. The exact implementation still depends on the host equipment, link design, environment, and governing specification.
What should a CFP2 specification include?
It should state cage type, electrical lane mapping, power class, cooling, firmware, and backward compatibility. These details allow a supplier or engineer to verify the requirement instead of relying only on the term CFP2.
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