AT-40G-ER4 Allied Telesis Compatible 40G ER4 40km SMF Transceiver

The AT-40G-ER4 is a 40G optical transceiver compatible with Allied Telesis platforms. Plug-and-play, no configuration required.

• Data Rate: 40G
• Protocol: ER4
• Wavelength: 1550nm
• Fiber Type: SMF
• Reach: 40km
• Connector: Duplex LC
• OEM Equivalent: AT-40G-ER4

OEM-compatible and MSA-compliant. Manufactured to supplier 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 TenFourOptics' GreenLights4Life® lifetime warranty — buy it once, covered forever. In stock and ships same or next business day. Trusted by network engineers and procurement teams across North America for over 10 years.