Edgecore ET7402-ER4 Compatible 100GBASE-ER4 Lite QSFP28 40km Module

EdgeOptic's ET7402-ER4 compatible is an Edgecore-coded 100GBASE-ER4 Lite QSFP28 transceiver built on our 100G-QSFP28-40 hardware platform. The module ships pre-programmed with the Edgecore vendor identifiers for the ET7402-ER4 ordering code, so the optic identifies on the host as the OEM transceiver. ET7402-ER4 is the 40km ER4 Lite member of the Edgecore ET7402 QSFP28 family, which spans SR4, LR4, ER4 and ZR4 reach classes.

Optically the module conforms to the 100GBASE-ER4 Lite specification. Four cooled LAN-WDM channels at 1295.56, 1300.05, 1304.58 and 1309.14 nm each carry 25.78125 Gbps NRZ, multiplexed onto one duplex LC single-mode fiber pair. The transmitter is an EML TOSA; the receiver is a 4-channel APD photodetector array, providing the additional sensitivity that distinguishes ER4 Lite from a standard LR4 build. Optical budget is 22 dB with host FEC, 18 dB without. ER4 Lite is not an IEEE 802.3ba or 802.3bm subclause and is not a 100G Lambda MSA grade; it is a generic 100GBASE-ER4 Lite specification used across vendor catalogs.

Reach is 40km on G.652 SMF with host RS-FEC enabled. Host-side FEC is the gating requirement for the 40km reach; the optic itself is transparent to FEC and contains no internal FEC engine. Engineers planning data-center interconnect or campus core links should confirm the host port has RS-FEC available on the 100GE MAC and verify both ends match during commissioning.

The ET7402-ER4 is intended for Edgecore switches with 100GE QSFP28 ports, commonly deployed with open network operating systems such as SONiC. Verify the optic and transceiver acceptance configuration in the host NOS for your specific switch model and software release before deployment, as supported optic lists and acceptance behavior vary by hardware family and NOS revision.

QSFP28 MSA SFF-8665 and SFF-8636 management compliance covers the electrical and software interfaces. DDM/DOM telemetry exposes per-lane TX and RX optical power, module temperature, supply voltage and laser bias current to the host for inspection and SNMP polling. The duplex LC connector accepts standard SMF patch cords. Power draw is bounded at 4.5 W maximum; the commercial 0 to +70 degC case-temperature range covers central-office and metro POP environments. Connector hygiene matters at ER4 Lite reach budgets; inspect and clean both end-faces before turn-up to avoid attenuation that erodes the FEC margin.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Ships next business day from EU stock with a lifetime warranty. For Edgecore platform compatibility verification or volume pricing, contact our sales team.