The AT-40G-CSR4 is a 40G optical transceiver compatible with Allied Telesis platforms. Plug-and-play, no configuration required.
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Data Rate: 40G
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Fiber Type: MMF
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Reach: 400m
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Connector: Duplex LC
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OEM Equivalent: AT-40G-CSR4
Compatibility: Documented OEM compatibility (Allied Telesis published compatibility documentation): this module is accepted in 40G QSFP+ ports on the SwitchBlade x8100 Series, SwitchBlade x908 GEN2, x550 Series, x560 Series, x930 Series, and x950 Series. Confirm your exact chassis, line card, and OS release against the Allied Telesis matrix before deployment.
Tested & Proven: Every TenFour Optics part is coded, tested, and verified before shipment — see Tested & Proven.
OEM-compatible and MSA-compliant. Manufactured to MSA specifications following ISO-certified processes. Class 1 laser certified, RoHS compliant. Digital Diagnostic Monitoring (DDM/DOM) supported. Every module is tested for traffic conformity per supported layer 2/3 protocols, DOM threshold verification, EEPROM/MSA value verification, serial number verification, and optical cleanliness before shipment.
Backed by the GreenLights4Life® Limited Lifetime Replacement Warranty. In-stock items ship same or next business day — contact 10.4@tenfouroptics.com to confirm availability and lead time. Trusted by network engineers and procurement teams across North America for over 10 years.
