LMQ3926-PC+ Hisense Compatible 400GBASE-FR4 QSFP-DD Transceiver

EdgeOptic's LMQ3926-PC+ compatible is a Hisense-coded 400GBASE-FR4 QSFP-DD transceiver that drops into a QSFP-DD host port programmed for Hisense Broadband. Same 2 km duplex single-mode reach, same LC/UPC connector, and same optical and electrical envelope as the original module, with EEPROM coded so the host accepts the module on insertion.

Four CWDM wavelengths at 1271, 1291, 1311, and 1331 nm multiplex onto a single duplex pair. PAM4 modulation at 53.125 GBaud per lane delivers 400 Gb/s aggregate throughput. EML transmitters drive each wavelength channel; PIN photodiode receivers handle the inbound side. TX power is -3.3 to +3.5 dBm per lane, RX sensitivity is -7.3 dBm. The 4 dB optical link budget covers a 2 km OS2 span with margin for patch panels and splices in normal data center cabling environments.

Hisense Broadband is the optical networking arm of the Hisense Group, separate from the consumer electronics business. The LMQ3926-PC+ is one of several Hisense Broadband 400G QSFP-DD variants. EdgeOptic codes the EEPROM so the module is accepted on the target host once the platform supports the QSFP-DD form factor. Verify support against Hisense Broadband compatibility documentation for the specific switch and software release before ordering.

Don't confuse the LMQ3926-PC+ with the LMQ8811-PC+ or the LMQ3921S-PC1. The LMQ3926-PC+ is FR4: CWDM wavelength multiplexing, LC duplex connector, 2 km reach over single-mode fiber. The LMQ8811-PC+ is SR8 over multi-mode fiber with 850 nm VCSELs, MTP/MPO-16 connector, 100 m reach over OM4 or OM5. The LMQ3921S-PC1 is DR4: parallel 1310 nm PSM4 lanes on an MPO-12 connector, 500 m reach over single-mode fiber. All three are 400G QSFP-DD modules with similar LMQ prefixes, but each uses a different fiber plant, connector, and reach class. Verify the exact part number, including the suffix, against the chassis transceiver table before ordering.

Conforms to IEEE 802.3cu, 100G Lambda MSA 400G-FR4, QSFP-DD MSA, and CMIS 4.0. CMIS exposes per-lane TX and RX optical power, module case temperature, supply voltage, and laser bias current over standard I2C, so DOM integrates with existing chassis monitoring. KP4 RS-FEC (RS(544,514)) is required from the host ASIC to meet the PAM4 BER target. Class 1 laser safe per IEC 60825-1, CE and RoHS certified, commercial temperature 0 to 70 °C, under 10 W power consumption.

FR4 fits 400G data center interconnect, leaf-spine uplinks, and aggregation above a 100G leaf layer. Duplex LC patching keeps structured cabling simple where the existing single-mode plant already uses LC, the alternative to MPO-12 parallel optics on DR4. 2 km covers most intra-campus runs; longer spans move to LR4.

Backed by 15+ years of EdgeOptic compatibility engineering across vendor optical platforms. Made to order with a 2-week lead time and lifetime warranty included. For volume pricing or platform-specific EEPROM coding requests, contact our sales team.