QSFPP-40GBASE-ER4 Juniper Compatible 40G ER4 40km SMF Transceiver

Decoded, the title describes a 40G ER4 optic reaching 40km over single-mode fiber on a duplex LC pair — the Juniper-coded version of exactly that, shipped as the QSFPP-40GBASE-ER4. It comes up coded to the host so Juniper gear sees a native module and links with no configuration required. At the ER4 grade the 40km reach on single-mode plant handles extended metro and inter-site 40G hops, with live optical diagnostics available over DDM once the port is up.

• Form Factor: SFP+
• Data Rate: 40G
• Protocol: ER4
• Fiber Type: SMF
• Reach: 40km
• Connector: Duplex LC
• OEM Equivalent: QSFPP-40GBASE-ER4

Compatibility: Documented OEM compatibility (Juniper published compatibility documentation): this module is accepted in 40G QSFP+ ports on the EX3400 Series, EX4600 Series, EX4650 Series, PTX10000 Series, QFX10000 Series, QFX5100 Series, and QFX5120 Series. This module follows Juniper's published compatibility matrix; for your exact line card or OS release, email 10.4@tenfouroptics.com and we'll confirm fit.

Tested & Proven: Every TenFour Optics part is coded, tested, and verified before shipment — see Tested & Proven.

Manufactured to MSA specification and individually verified on the bench before it ships. Backed by the GreenLights4Life® Limited Lifetime Replacement Warranty. In stock — ships same or next business day.